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-rw-r--r--test/-ext-/array/test_resize.rb1
-rw-r--r--test/-ext-/bignum/test_big2str.rb1
-rw-r--r--test/-ext-/bignum/test_bigzero.rb1
-rw-r--r--test/-ext-/bignum/test_div.rb1
-rw-r--r--test/-ext-/bignum/test_mul.rb1
-rw-r--r--test/-ext-/bignum/test_pack.rb1
-rw-r--r--test/-ext-/bignum/test_str2big.rb1
-rw-r--r--test/-ext-/bug_reporter/test_bug_reporter.rb1
-rw-r--r--test/-ext-/class/test_class2name.rb1
-rw-r--r--test/-ext-/debug/test_debug.rb1
-rw-r--r--test/-ext-/debug/test_profile_frames.rb1
-rw-r--r--test/-ext-/exception/test_data_error.rb1
-rw-r--r--test/-ext-/exception/test_enc_raise.rb1
-rw-r--r--test/-ext-/exception/test_ensured.rb1
-rw-r--r--test/-ext-/file/test_stat.rb1
-rw-r--r--test/-ext-/float/test_nextafter.rb1
-rw-r--r--test/-ext-/funcall/test_passing_block.rb1
-rw-r--r--test/-ext-/gvl/test_last_thread.rb1
-rw-r--r--test/-ext-/hash/test_delete.rb1
-rw-r--r--test/-ext-/iseq_load/test_iseq_load.rb1
-rw-r--r--test/-ext-/iter/test_iter_break.rb1
-rw-r--r--test/-ext-/iter/test_yield_block.rb1
-rw-r--r--test/-ext-/load/test_dot_dot.rb1
-rw-r--r--test/-ext-/marshal/test_internal_ivar.rb1
-rw-r--r--test/-ext-/marshal/test_usrmarshal.rb1
-rw-r--r--test/-ext-/method/test_arity.rb1
-rw-r--r--test/-ext-/num2int/test_num2int.rb1
-rw-r--r--test/-ext-/path_to_class/test_path_to_class.rb1
-rw-r--r--test/-ext-/popen_deadlock/test_popen_deadlock.rb1
-rw-r--r--test/-ext-/postponed_job/test_postponed_job.rb1
-rw-r--r--test/-ext-/proc/test_bmethod.rb1
-rw-r--r--test/-ext-/rational/test_rat.rb1
-rw-r--r--test/-ext-/st/test_foreach.rb1
-rw-r--r--test/-ext-/st/test_numhash.rb1
-rw-r--r--test/-ext-/st/test_update.rb1
-rw-r--r--test/-ext-/string/test_coderange.rb1
-rw-r--r--test/-ext-/string/test_cstr.rb1
-rw-r--r--test/-ext-/string/test_ellipsize.rb1
-rw-r--r--test/-ext-/string/test_enc_associate.rb1
-rw-r--r--test/-ext-/string/test_enc_str_buf_cat.rb1
-rw-r--r--test/-ext-/string/test_fstring.rb1
-rw-r--r--test/-ext-/string/test_modify_expand.rb1
-rw-r--r--test/-ext-/string/test_nofree.rb1
-rw-r--r--test/-ext-/string/test_normalize.rb1
-rw-r--r--test/-ext-/string/test_qsort.rb1
-rw-r--r--test/-ext-/string/test_set_len.rb1
-rw-r--r--test/-ext-/struct/test_member.rb1
-rw-r--r--test/-ext-/symbol/test_inadvertent_creation.rb1
-rw-r--r--test/-ext-/symbol/test_type.rb1
-rw-r--r--test/-ext-/test_bug-3571.rb1
-rw-r--r--test/-ext-/test_bug-5832.rb1
-rw-r--r--test/-ext-/test_notimplement.rb1
-rw-r--r--test/-ext-/test_printf.rb1
-rw-r--r--test/-ext-/test_recursion.rb1
-rw-r--r--test/-ext-/time/test_new.rb1
-rw-r--r--test/-ext-/tracepoint/test_tracepoint.rb1
-rw-r--r--test/-ext-/typeddata/test_typeddata.rb1
-rw-r--r--test/-ext-/wait_for_single_fd/test_wait_for_single_fd.rb1
-rw-r--r--test/-ext-/win32/test_console_attr.rb1
-rw-r--r--test/-ext-/win32/test_dln.rb1
-rw-r--r--test/-ext-/win32/test_fd_setsize.rb1
-rw-r--r--test/base64/test_base64.rb1
-rw-r--r--test/benchmark/test_benchmark.rb1
-rw-r--r--test/bigdecimal/test_bigdecimal.rb1
-rw-r--r--test/bigdecimal/test_bigdecimal_util.rb1
-rw-r--r--test/bigdecimal/test_bigmath.rb1
-rw-r--r--test/bigdecimal/testbase.rb1
-rw-r--r--test/cgi/test_cgi_cookie.rb1
-rw-r--r--test/cgi/test_cgi_core.rb1
-rw-r--r--test/cgi/test_cgi_header.rb1
-rw-r--r--test/cgi/test_cgi_modruby.rb1
-rw-r--r--test/cgi/test_cgi_multipart.rb1
-rw-r--r--test/cgi/test_cgi_session.rb1
-rw-r--r--test/cgi/test_cgi_tag_helper.rb1
-rw-r--r--test/cgi/test_cgi_util.rb1
-rw-r--r--test/cgi/update_env.rb1
-rw-r--r--test/coverage/test_coverage.rb1
-rw-r--r--test/csv/base.rb1
-rwxr-xr-xtest/csv/test_csv_parsing.rb1
-rwxr-xr-xtest/csv/test_csv_writing.rb1
-rwxr-xr-xtest/csv/test_data_converters.rb1
-rwxr-xr-xtest/csv/test_encodings.rb1
-rwxr-xr-xtest/csv/test_features.rb1
-rwxr-xr-xtest/csv/test_headers.rb1
-rwxr-xr-xtest/csv/test_interface.rb1
-rwxr-xr-xtest/csv/test_row.rb1
-rwxr-xr-xtest/csv/test_table.rb1
-rw-r--r--test/csv/ts_all.rb1
-rw-r--r--test/date/test_date.rb1
-rw-r--r--test/date/test_date_arith.rb1
-rw-r--r--test/date/test_date_attr.rb1
-rw-r--r--test/date/test_date_base.rb1
-rw-r--r--test/date/test_date_compat.rb1
-rw-r--r--test/date/test_date_conv.rb1
-rw-r--r--test/date/test_date_marshal.rb1
-rw-r--r--test/date/test_date_new.rb1
-rw-r--r--test/date/test_date_parse.rb1
-rw-r--r--test/date/test_date_strftime.rb1
-rw-r--r--test/date/test_date_strptime.rb1
-rw-r--r--test/date/test_switch_hitter.rb1
-rw-r--r--test/dbm/test_dbm.rb1
-rw-r--r--test/digest/digest/foo.rb1
-rw-r--r--test/digest/test_digest.rb1
-rw-r--r--test/digest/test_digest_extend.rb1
-rw-r--r--test/drb/drbtest.rb1
-rw-r--r--test/drb/ignore_test_drb.rb1
-rw-r--r--test/drb/test_acl.rb1
-rw-r--r--test/drb/test_drb.rb1
-rw-r--r--test/drb/test_drbssl.rb1
-rw-r--r--test/drb/test_drbunix.rb1
-rw-r--r--test/drb/ut_array.rb1
-rw-r--r--test/drb/ut_array_drbssl.rb1
-rw-r--r--test/drb/ut_array_drbunix.rb1
-rw-r--r--test/drb/ut_drb.rb1
-rw-r--r--test/drb/ut_drb_drbssl.rb1
-rw-r--r--test/drb/ut_drb_drbunix.rb1
-rw-r--r--test/drb/ut_eq.rb1
-rw-r--r--test/drb/ut_eval.rb1
-rw-r--r--test/drb/ut_large.rb1
-rw-r--r--test/drb/ut_port.rb1
-rw-r--r--test/drb/ut_safe1.rb1
-rw-r--r--test/drb/ut_timerholder.rb1
-rw-r--r--test/dtrace/dummy.rb1
-rw-r--r--test/dtrace/helper.rb1
-rw-r--r--test/dtrace/test_array_create.rb1
-rw-r--r--test/dtrace/test_cmethod.rb1
-rw-r--r--test/dtrace/test_function_entry.rb1
-rw-r--r--test/dtrace/test_gc.rb1
-rw-r--r--test/dtrace/test_hash_create.rb1
-rw-r--r--test/dtrace/test_load.rb1
-rw-r--r--test/dtrace/test_method_cache.rb1
-rw-r--r--test/dtrace/test_object_create_start.rb1
-rw-r--r--test/dtrace/test_raise.rb1
-rw-r--r--test/dtrace/test_require.rb1
-rw-r--r--test/dtrace/test_singleton_function.rb1
-rw-r--r--test/dtrace/test_string.rb1
-rw-r--r--test/erb/test_erb.rb1
-rw-r--r--test/erb/test_erb_command.rb1
-rw-r--r--test/erb/test_erb_m17n.rb1
-rw-r--r--test/etc/test_etc.rb1
-rw-r--r--test/excludes/TestException.rb1
-rw-r--r--test/excludes/TestIO_Console.rb1
-rw-r--r--test/excludes/TestThread.rb1
-rw-r--r--test/fiddle/helper.rb1
-rw-r--r--test/fiddle/test_c_struct_entry.rb1
-rw-r--r--test/fiddle/test_c_union_entity.rb1
-rw-r--r--test/fiddle/test_closure.rb1
-rw-r--r--test/fiddle/test_cparser.rb1
-rw-r--r--test/fiddle/test_fiddle.rb1
-rw-r--r--test/fiddle/test_func.rb1
-rw-r--r--test/fiddle/test_function.rb1
-rw-r--r--test/fiddle/test_handle.rb1
-rw-r--r--test/fiddle/test_import.rb1
-rw-r--r--test/fiddle/test_pointer.rb1
-rw-r--r--test/fileutils/clobber.rb1
-rw-r--r--test/fileutils/fileasserts.rb1
-rw-r--r--test/fileutils/test_dryrun.rb1
-rw-r--r--test/fileutils/test_fileutils.rb1
-rw-r--r--test/fileutils/test_nowrite.rb1
-rw-r--r--test/fileutils/test_verbose.rb1
-rw-r--r--test/fileutils/visibility_tests.rb1
-rw-r--r--test/gdbm/test_gdbm.rb1
-rw-r--r--test/io/console/test_io_console.rb1
-rw-r--r--test/io/nonblock/test_flush.rb1
-rw-r--r--test/io/wait/test_io_wait.rb1
-rw-r--r--test/irb/test_completion.rb1
-rw-r--r--test/irb/test_option.rb1
-rw-r--r--test/irb/test_raise_no_backtrace_exception.rb1
-rw-r--r--test/json/setup_variant.rb1
-rwxr-xr-xtest/json/test_json.rb1
-rw-r--r--test/json/test_json_addition.rb1
-rw-r--r--test/json/test_json_encoding.rb1
-rw-r--r--test/json/test_json_fixtures.rb1
-rw-r--r--test/json/test_json_generate.rb1
-rw-r--r--test/json/test_json_generic_object.rb1
-rw-r--r--test/json/test_json_string_matching.rb1
-rw-r--r--test/json/test_json_unicode.rb1
-rw-r--r--test/lib/envutil.rb1
-rw-r--r--test/lib/find_executable.rb1
-rw-r--r--test/lib/iseq_loader_checker.rb1
-rw-r--r--test/lib/leakchecker.rb1
-rw-r--r--test/lib/memory_status.rb1
-rw-r--r--test/lib/minitest/autorun.rb1
-rw-r--r--test/lib/minitest/benchmark.rb1
-rw-r--r--test/lib/minitest/mock.rb1
-rw-r--r--test/lib/minitest/unit.rb1
-rw-r--r--test/lib/profile_test_all.rb1
-rw-r--r--test/lib/test/unit.rb1
-rw-r--r--test/lib/test/unit/assertions.rb1
-rw-r--r--test/lib/test/unit/parallel.rb1
-rw-r--r--test/lib/test/unit/testcase.rb1
-rw-r--r--test/lib/tracepointchecker.rb1
-rw-r--r--test/lib/with_different_ofs.rb1
-rw-r--r--test/lib/zombie_hunter.rb1
-rw-r--r--test/logger/test_logdevice.rb1
-rw-r--r--test/logger/test_logger.rb1
-rw-r--r--test/logger/test_severity.rb1
-rw-r--r--test/matrix/test_matrix.rb1
-rw-r--r--test/matrix/test_vector.rb1
-rw-r--r--test/minitest/metametameta.rb1
-rw-r--r--test/minitest/test_minitest_benchmark.rb1
-rw-r--r--test/minitest/test_minitest_mock.rb1
-rw-r--r--test/minitest/test_minitest_unit.rb1
-rw-r--r--test/misc/test_ruby_mode.rb1
-rw-r--r--test/mkmf/base.rb1
-rw-r--r--test/mkmf/test_config.rb1
-rw-r--r--test/mkmf/test_constant.rb1
-rw-r--r--test/mkmf/test_convertible.rb1
-rw-r--r--test/mkmf/test_find_executable.rb1
-rw-r--r--test/mkmf/test_flags.rb1
-rw-r--r--test/mkmf/test_framework.rb1
-rw-r--r--test/mkmf/test_have_func.rb1
-rw-r--r--test/mkmf/test_have_library.rb1
-rw-r--r--test/mkmf/test_have_macro.rb1
-rw-r--r--test/mkmf/test_libs.rb1
-rw-r--r--test/mkmf/test_signedness.rb1
-rw-r--r--test/mkmf/test_sizeof.rb1
-rw-r--r--test/monitor/test_monitor.rb1
-rw-r--r--test/net/http/test_buffered_io.rb1
-rw-r--r--test/net/http/test_http.rb1
-rw-r--r--test/net/http/test_http_request.rb1
-rw-r--r--test/net/http/test_httpheader.rb1
-rw-r--r--test/net/http/test_httpresponse.rb1
-rw-r--r--test/net/http/test_httpresponses.rb1
-rw-r--r--test/net/http/test_https.rb1
-rw-r--r--test/net/http/test_https_proxy.rb1
-rw-r--r--test/net/http/utils.rb1
-rw-r--r--test/net/pop/test_pop.rb1
-rw-r--r--test/net/protocol/test_protocol.rb1
-rw-r--r--test/net/smtp/test_response.rb1
-rw-r--r--test/net/smtp/test_smtp.rb1
-rw-r--r--test/net/smtp/test_ssl_socket.rb1
-rw-r--r--test/nkf/test_kconv.rb1
-rw-r--r--test/nkf/test_nkf.rb1
-rw-r--r--test/objspace/test_objspace.rb1
-rw-r--r--test/openssl/test_asn1.rb1
-rw-r--r--test/openssl/test_bn.rb1
-rw-r--r--test/openssl/test_buffering.rb1
-rw-r--r--test/openssl/test_cipher.rb1
-rw-r--r--test/openssl/test_config.rb1
-rw-r--r--test/openssl/test_digest.rb1
-rw-r--r--test/openssl/test_engine.rb1
-rw-r--r--test/openssl/test_fips.rb1
-rw-r--r--test/openssl/test_hmac.rb1
-rw-r--r--test/openssl/test_ns_spki.rb1
-rw-r--r--test/openssl/test_ocsp.rb1
-rw-r--r--test/openssl/test_pair.rb1
-rw-r--r--test/openssl/test_partial_record_read.rb1
-rw-r--r--test/openssl/test_pkcs12.rb1
-rw-r--r--test/openssl/test_pkcs5.rb1
-rw-r--r--test/openssl/test_pkcs7.rb1
-rw-r--r--test/openssl/test_pkey_dh.rb1
-rw-r--r--test/openssl/test_pkey_dsa.rb1
-rw-r--r--test/openssl/test_pkey_ec.rb1
-rw-r--r--test/openssl/test_pkey_rsa.rb1
-rw-r--r--test/openssl/test_random.rb1
-rw-r--r--test/openssl/test_ssl.rb1
-rw-r--r--test/openssl/test_ssl_session.rb1
-rw-r--r--test/openssl/test_x509cert.rb1
-rw-r--r--test/openssl/test_x509crl.rb1
-rw-r--r--test/openssl/test_x509ext.rb1
-rw-r--r--test/openssl/test_x509name.rb1
-rw-r--r--test/openssl/test_x509req.rb1
-rw-r--r--test/openssl/test_x509store.rb1
-rw-r--r--test/openssl/utils.rb1
-rw-r--r--test/optparse/test_acceptable.rb1
-rw-r--r--test/optparse/test_autoconf.rb1
-rw-r--r--test/optparse/test_bash_completion.rb1
-rw-r--r--test/optparse/test_getopts.rb1
-rw-r--r--test/optparse/test_noarg.rb1
-rw-r--r--test/optparse/test_optarg.rb1
-rw-r--r--test/optparse/test_optparse.rb1
-rw-r--r--test/optparse/test_placearg.rb1
-rw-r--r--test/optparse/test_reqarg.rb1
-rw-r--r--test/optparse/test_summary.rb1
-rw-r--r--test/optparse/test_zsh_completion.rb1
-rw-r--r--test/ostruct/test_ostruct.rb1
-rw-r--r--test/psych/handlers/test_recorder.rb1
-rw-r--r--test/psych/helper.rb1
-rw-r--r--test/psych/json/test_stream.rb1
-rw-r--r--test/psych/nodes/test_enumerable.rb1
-rw-r--r--test/psych/test_alias_and_anchor.rb1
-rw-r--r--test/psych/test_array.rb1
-rw-r--r--test/psych/test_boolean.rb1
-rw-r--r--test/psych/test_class.rb1
-rw-r--r--test/psych/test_coder.rb1
-rw-r--r--test/psych/test_date_time.rb1
-rw-r--r--test/psych/test_deprecated.rb1
-rw-r--r--test/psych/test_document.rb1
-rw-r--r--test/psych/test_emitter.rb1
-rw-r--r--test/psych/test_encoding.rb1
-rw-r--r--test/psych/test_exception.rb1
-rw-r--r--test/psych/test_hash.rb1
-rw-r--r--test/psych/test_json_tree.rb1
-rw-r--r--test/psych/test_marshalable.rb1
-rw-r--r--test/psych/test_merge_keys.rb1
-rw-r--r--test/psych/test_nil.rb1
-rw-r--r--test/psych/test_null.rb1
-rw-r--r--test/psych/test_numeric.rb1
-rw-r--r--test/psych/test_object.rb1
-rw-r--r--test/psych/test_object_references.rb1
-rw-r--r--test/psych/test_omap.rb1
-rw-r--r--test/psych/test_parser.rb1
-rw-r--r--test/psych/test_psych.rb1
-rw-r--r--test/psych/test_safe_load.rb1
-rw-r--r--test/psych/test_scalar.rb1
-rw-r--r--test/psych/test_scalar_scanner.rb1
-rw-r--r--test/psych/test_serialize_subclasses.rb1
-rw-r--r--test/psych/test_set.rb1
-rw-r--r--test/psych/test_stream.rb1
-rw-r--r--test/psych/test_string.rb1
-rw-r--r--test/psych/test_struct.rb1
-rw-r--r--test/psych/test_symbol.rb1
-rw-r--r--test/psych/test_tainted.rb1
-rw-r--r--test/psych/test_to_yaml_properties.rb1
-rw-r--r--test/psych/test_tree_builder.rb1
-rw-r--r--test/psych/test_yaml.rb1
-rw-r--r--test/psych/test_yamldbm.rb1
-rw-r--r--test/psych/test_yamlstore.rb1
-rw-r--r--test/psych/visitors/test_depth_first.rb1
-rw-r--r--test/psych/visitors/test_emitter.rb1
-rw-r--r--test/psych/visitors/test_to_ruby.rb1
-rw-r--r--test/psych/visitors/test_yaml_tree.rb1
-rw-r--r--test/rdoc/test_rdoc_alias.rb1
-rw-r--r--test/rdoc/test_rdoc_any_method.rb1
-rw-r--r--test/rdoc/test_rdoc_attr.rb1
-rw-r--r--test/rdoc/test_rdoc_class_module.rb1
-rw-r--r--test/rdoc/test_rdoc_code_object.rb1
-rw-r--r--test/rdoc/test_rdoc_comment.rb1
-rw-r--r--test/rdoc/test_rdoc_constant.rb1
-rw-r--r--test/rdoc/test_rdoc_context.rb1
-rw-r--r--test/rdoc/test_rdoc_context_section.rb1
-rw-r--r--test/rdoc/test_rdoc_cross_reference.rb1
-rw-r--r--test/rdoc/test_rdoc_encoding.rb1
-rw-r--r--test/rdoc/test_rdoc_extend.rb1
-rw-r--r--test/rdoc/test_rdoc_generator_darkfish.rb1
-rw-r--r--test/rdoc/test_rdoc_generator_json_index.rb1
-rw-r--r--test/rdoc/test_rdoc_generator_markup.rb1
-rw-r--r--test/rdoc/test_rdoc_generator_pot.rb1
-rw-r--r--test/rdoc/test_rdoc_generator_pot_po.rb1
-rw-r--r--test/rdoc/test_rdoc_generator_pot_po_entry.rb1
-rw-r--r--test/rdoc/test_rdoc_generator_ri.rb1
-rw-r--r--test/rdoc/test_rdoc_i18n_locale.rb1
-rw-r--r--test/rdoc/test_rdoc_i18n_text.rb1
-rw-r--r--test/rdoc/test_rdoc_include.rb1
-rw-r--r--test/rdoc/test_rdoc_markdown.rb1
-rw-r--r--test/rdoc/test_rdoc_markdown_test.rb1
-rw-r--r--test/rdoc/test_rdoc_markup.rb1
-rw-r--r--test/rdoc/test_rdoc_markup_attribute_manager.rb1
-rw-r--r--test/rdoc/test_rdoc_markup_attributes.rb1
-rw-r--r--test/rdoc/test_rdoc_markup_document.rb1
-rw-r--r--test/rdoc/test_rdoc_markup_formatter.rb1
-rw-r--r--test/rdoc/test_rdoc_markup_hard_break.rb1
-rw-r--r--test/rdoc/test_rdoc_markup_heading.rb1
-rw-r--r--test/rdoc/test_rdoc_markup_include.rb1
-rw-r--r--test/rdoc/test_rdoc_markup_indented_paragraph.rb1
-rw-r--r--test/rdoc/test_rdoc_markup_paragraph.rb1
-rw-r--r--test/rdoc/test_rdoc_markup_parser.rb1
-rw-r--r--test/rdoc/test_rdoc_markup_pre_process.rb1
-rw-r--r--test/rdoc/test_rdoc_markup_raw.rb1
-rw-r--r--test/rdoc/test_rdoc_markup_to_ansi.rb1
-rw-r--r--test/rdoc/test_rdoc_markup_to_bs.rb1
-rw-r--r--test/rdoc/test_rdoc_markup_to_html.rb1
-rw-r--r--test/rdoc/test_rdoc_markup_to_html_crossref.rb1
-rw-r--r--test/rdoc/test_rdoc_markup_to_html_snippet.rb1
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-rw-r--r--test/rubygems/test_gem_resolver_conflict.rb1
-rw-r--r--test/rubygems/test_gem_resolver_dependency_request.rb1
-rw-r--r--test/rubygems/test_gem_resolver_git_set.rb1
-rw-r--r--test/rubygems/test_gem_resolver_git_specification.rb1
-rw-r--r--test/rubygems/test_gem_resolver_index_set.rb1
-rw-r--r--test/rubygems/test_gem_resolver_index_specification.rb1
-rw-r--r--test/rubygems/test_gem_resolver_installed_specification.rb1
-rw-r--r--test/rubygems/test_gem_resolver_installer_set.rb1
-rw-r--r--test/rubygems/test_gem_resolver_local_specification.rb1
-rw-r--r--test/rubygems/test_gem_resolver_lock_set.rb1
-rw-r--r--test/rubygems/test_gem_resolver_lock_specification.rb1
-rw-r--r--test/rubygems/test_gem_resolver_requirement_list.rb1
-rw-r--r--test/rubygems/test_gem_resolver_specification.rb1
-rw-r--r--test/rubygems/test_gem_resolver_vendor_set.rb1
-rw-r--r--test/rubygems/test_gem_resolver_vendor_specification.rb1
-rw-r--r--test/rubygems/test_gem_security.rb1
-rw-r--r--test/rubygems/test_gem_security_policy.rb1
-rw-r--r--test/rubygems/test_gem_security_signer.rb1
-rw-r--r--test/rubygems/test_gem_security_trust_dir.rb1
-rw-r--r--test/rubygems/test_gem_server.rb1
-rw-r--r--test/rubygems/test_gem_silent_ui.rb1
-rw-r--r--test/rubygems/test_gem_source.rb1
-rw-r--r--test/rubygems/test_gem_source_fetch_problem.rb1
-rw-r--r--test/rubygems/test_gem_source_git.rb1
-rw-r--r--test/rubygems/test_gem_source_installed.rb1
-rw-r--r--test/rubygems/test_gem_source_list.rb1
-rw-r--r--test/rubygems/test_gem_source_local.rb1
-rw-r--r--test/rubygems/test_gem_source_lock.rb1
-rw-r--r--test/rubygems/test_gem_source_specific_file.rb1
-rw-r--r--test/rubygems/test_gem_source_vendor.rb1
-rw-r--r--test/rubygems/test_gem_spec_fetcher.rb1
-rw-r--r--test/rubygems/test_gem_specification.rb1
-rw-r--r--test/rubygems/test_gem_stream_ui.rb1
-rw-r--r--test/rubygems/test_gem_stub_specification.rb1
-rw-r--r--test/rubygems/test_gem_text.rb1
-rw-r--r--test/rubygems/test_gem_uninstaller.rb1
-rw-r--r--test/rubygems/test_gem_unsatisfiable_dependency_error.rb1
-rw-r--r--test/rubygems/test_gem_uri_formatter.rb1
-rw-r--r--test/rubygems/test_gem_util.rb1
-rw-r--r--test/rubygems/test_gem_validator.rb1
-rw-r--r--test/rubygems/test_gem_version.rb1
-rw-r--r--test/rubygems/test_gem_version_option.rb1
-rw-r--r--test/rubygems/test_kernel.rb1
-rw-r--r--test/rubygems/test_require.rb1
-rw-r--r--test/runner.rb1
-rw-r--r--test/scanf/test_scanf.rb1
-rw-r--r--test/scanf/test_scanfblocks.rb1
-rw-r--r--test/scanf/test_scanfio.rb1
-rw-r--r--test/sdbm/test_sdbm.rb1
-rw-r--r--test/shell/test_command_processor.rb1
-rw-r--r--test/stringio/test_stringio.rb1
-rw-r--r--test/strscan/test_stringscanner.rb1
-rw-r--r--test/syslog/test_syslog_logger.rb1
-rw-r--r--test/test_abbrev.rb1
-rw-r--r--test/test_cmath.rb1
-rw-r--r--test/test_delegate.rb1
-rw-r--r--test/test_find.rb1
-rw-r--r--test/test_forwardable.rb1
-rw-r--r--test/test_ipaddr.rb1
-rw-r--r--test/test_mathn.rb1
-rw-r--r--test/test_mutex_m.rb1
-rw-r--r--test/test_observer.rb1
-rw-r--r--test/test_prime.rb1
-rw-r--r--test/test_pstore.rb1
-rw-r--r--test/test_pty.rb1
-rw-r--r--test/test_rbconfig.rb1
-rw-r--r--test/test_securerandom.rb1
-rw-r--r--test/test_set.rb1
-rw-r--r--test/test_shellwords.rb1
-rw-r--r--test/test_singleton.rb1
-rw-r--r--test/test_syslog.rb1
-rw-r--r--test/test_tempfile.rb1
-rw-r--r--test/test_timeout.rb1
-rw-r--r--test/test_tmpdir.rb1
-rw-r--r--test/test_tracer.rb1
-rw-r--r--test/test_unicode_normalize.rb1
-rw-r--r--test/test_weakref.rb1
-rw-r--r--test/test_win32api.rb1
-rw-r--r--test/testunit/test4test_hideskip.rb1
-rw-r--r--test/testunit/test4test_redefinition.rb1
-rw-r--r--test/testunit/test4test_sorting.rb1
-rw-r--r--test/testunit/test_assertion.rb1
-rw-r--r--test/testunit/test_hideskip.rb1
-rw-r--r--test/testunit/test_parallel.rb1
-rw-r--r--test/testunit/test_redefinition.rb1
-rw-r--r--test/testunit/test_sorting.rb1
-rw-r--r--test/testunit/tests_for_parallel/ptest_first.rb1
-rw-r--r--test/testunit/tests_for_parallel/ptest_forth.rb1
-rw-r--r--test/testunit/tests_for_parallel/ptest_second.rb1
-rw-r--r--test/testunit/tests_for_parallel/ptest_third.rb1
-rw-r--r--test/testunit/tests_for_parallel/runner.rb1
-rw-r--r--test/thread/test_cv.rb1
-rw-r--r--test/thread/test_queue.rb1
-rw-r--r--test/thread/test_sync.rb1
-rw-r--r--test/uri/test_common.rb1
-rw-r--r--test/uri/test_ftp.rb1
-rw-r--r--test/uri/test_generic.rb1
-rw-r--r--test/uri/test_http.rb1
-rw-r--r--test/uri/test_ldap.rb1
-rw-r--r--test/uri/test_mailto.rb1
-rw-r--r--test/uri/test_parser.rb1
-rw-r--r--test/webrick/test_cgi.rb1
-rw-r--r--test/webrick/test_cookie.rb1
-rw-r--r--test/webrick/test_do_not_reverse_lookup.rb1
-rw-r--r--test/webrick/test_filehandler.rb1
-rw-r--r--test/webrick/test_htmlutils.rb1
-rw-r--r--test/webrick/test_httpauth.rb1
-rw-r--r--test/webrick/test_httpproxy.rb1
-rw-r--r--test/webrick/test_httprequest.rb1
-rw-r--r--test/webrick/test_httpresponse.rb1
-rw-r--r--test/webrick/test_httpserver.rb1
-rw-r--r--test/webrick/test_httputils.rb1
-rw-r--r--test/webrick/test_httpversion.rb1
-rw-r--r--test/webrick/test_server.rb1
-rw-r--r--test/webrick/test_utils.rb1
-rw-r--r--test/webrick/utils.rb1
-rw-r--r--test/win32ole/err_in_callback.rb1
-rw-r--r--test/win32ole/test_err_in_callback.rb1
-rw-r--r--test/win32ole/test_folderitem2_invokeverb.rb1
-rw-r--r--test/win32ole/test_nil2vtempty.rb1
-rw-r--r--test/win32ole/test_ole_methods.rb1
-rw-r--r--test/win32ole/test_propertyputref.rb1
-rw-r--r--test/win32ole/test_thread.rb1
-rw-r--r--test/win32ole/test_win32ole.rb1
-rw-r--r--test/win32ole/test_win32ole_event.rb1
-rw-r--r--test/win32ole/test_win32ole_method.rb1
-rw-r--r--test/win32ole/test_win32ole_param.rb1
-rw-r--r--test/win32ole/test_win32ole_record.rb1
-rw-r--r--test/win32ole/test_win32ole_type.rb1
-rw-r--r--test/win32ole/test_win32ole_typelib.rb1
-rw-r--r--test/win32ole/test_win32ole_variable.rb1
-rw-r--r--test/win32ole/test_win32ole_variant.rb1
-rw-r--r--test/win32ole/test_win32ole_variant_m.rb1
-rw-r--r--test/win32ole/test_win32ole_variant_outarg.rb1
-rw-r--r--test/win32ole/test_word.rb1
-rw-r--r--test/xmlrpc/test_client.rb1
-rw-r--r--test/xmlrpc/test_cookie.rb1
-rw-r--r--test/xmlrpc/test_datetime.rb1
-rw-r--r--test/xmlrpc/test_features.rb1
-rw-r--r--test/xmlrpc/test_marshal.rb1
-rw-r--r--test/xmlrpc/test_parser.rb1
-rw-r--r--test/xmlrpc/test_webrick_server.rb1
-rw-r--r--test/xmlrpc/webrick_testing.rb1
-rw-r--r--test/zlib/test_zlib.rb1
869 files changed, 870 insertions, 1 deletions
diff --git a/test/-ext-/array/test_resize.rb b/test/-ext-/array/test_resize.rb
index 8e526b5a0c..f6a368cb75 100644
--- a/test/-ext-/array/test_resize.rb
+++ b/test/-ext-/array/test_resize.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require '-test-/array/resize'
diff --git a/test/-ext-/bignum/test_big2str.rb b/test/-ext-/bignum/test_big2str.rb
index 0af552ea70..4fae24eb34 100644
--- a/test/-ext-/bignum/test_big2str.rb
+++ b/test/-ext-/bignum/test_big2str.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/bignum"
diff --git a/test/-ext-/bignum/test_bigzero.rb b/test/-ext-/bignum/test_bigzero.rb
index f75c4590b8..8529e54456 100644
--- a/test/-ext-/bignum/test_bigzero.rb
+++ b/test/-ext-/bignum/test_bigzero.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/bignum"
diff --git a/test/-ext-/bignum/test_div.rb b/test/-ext-/bignum/test_div.rb
index 9c1a3c3d2a..9a8e93b081 100644
--- a/test/-ext-/bignum/test_div.rb
+++ b/test/-ext-/bignum/test_div.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/bignum"
diff --git a/test/-ext-/bignum/test_mul.rb b/test/-ext-/bignum/test_mul.rb
index 3e78247aa4..103a00fbad 100644
--- a/test/-ext-/bignum/test_mul.rb
+++ b/test/-ext-/bignum/test_mul.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/bignum"
diff --git a/test/-ext-/bignum/test_pack.rb b/test/-ext-/bignum/test_pack.rb
index f2a3df814e..04bf3e02de 100644
--- a/test/-ext-/bignum/test_pack.rb
+++ b/test/-ext-/bignum/test_pack.rb
@@ -1,4 +1,5 @@
# coding: ASCII-8BIT
+# frozen_string_literal: false
require 'test/unit'
require "-test-/bignum"
diff --git a/test/-ext-/bignum/test_str2big.rb b/test/-ext-/bignum/test_str2big.rb
index 4304be88e9..3b5750154e 100644
--- a/test/-ext-/bignum/test_str2big.rb
+++ b/test/-ext-/bignum/test_str2big.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/bignum"
diff --git a/test/-ext-/bug_reporter/test_bug_reporter.rb b/test/-ext-/bug_reporter/test_bug_reporter.rb
index e68adeef06..fb37658c92 100644
--- a/test/-ext-/bug_reporter/test_bug_reporter.rb
+++ b/test/-ext-/bug_reporter/test_bug_reporter.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'tmpdir'
diff --git a/test/-ext-/class/test_class2name.rb b/test/-ext-/class/test_class2name.rb
index 070be5a130..e61964d9eb 100644
--- a/test/-ext-/class/test_class2name.rb
+++ b/test/-ext-/class/test_class2name.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/class"
diff --git a/test/-ext-/debug/test_debug.rb b/test/-ext-/debug/test_debug.rb
index ec506e0ca5..3804714d0d 100644
--- a/test/-ext-/debug/test_debug.rb
+++ b/test/-ext-/debug/test_debug.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require '-test-/debug'
diff --git a/test/-ext-/debug/test_profile_frames.rb b/test/-ext-/debug/test_profile_frames.rb
index e257ef09b3..860652c0cd 100644
--- a/test/-ext-/debug/test_profile_frames.rb
+++ b/test/-ext-/debug/test_profile_frames.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require '-test-/debug'
diff --git a/test/-ext-/exception/test_data_error.rb b/test/-ext-/exception/test_data_error.rb
index 53cbb28438..d33d8ca43f 100644
--- a/test/-ext-/exception/test_data_error.rb
+++ b/test/-ext-/exception/test_data_error.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
module Bug
diff --git a/test/-ext-/exception/test_enc_raise.rb b/test/-ext-/exception/test_enc_raise.rb
index a578b167ea..2bc7f02413 100644
--- a/test/-ext-/exception/test_enc_raise.rb
+++ b/test/-ext-/exception/test_enc_raise.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require '-test-/exception'
diff --git a/test/-ext-/exception/test_ensured.rb b/test/-ext-/exception/test_ensured.rb
index 97d9794186..858245868b 100644
--- a/test/-ext-/exception/test_ensured.rb
+++ b/test/-ext-/exception/test_ensured.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
module Bug
diff --git a/test/-ext-/file/test_stat.rb b/test/-ext-/file/test_stat.rb
index b9aa132932..9eebcd97b9 100644
--- a/test/-ext-/file/test_stat.rb
+++ b/test/-ext-/file/test_stat.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/file"
diff --git a/test/-ext-/float/test_nextafter.rb b/test/-ext-/float/test_nextafter.rb
index e3a3e726c7..c131d1e413 100644
--- a/test/-ext-/float/test_nextafter.rb
+++ b/test/-ext-/float/test_nextafter.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/float"
diff --git a/test/-ext-/funcall/test_passing_block.rb b/test/-ext-/funcall/test_passing_block.rb
index 87aed2212c..fac7eaf953 100644
--- a/test/-ext-/funcall/test_passing_block.rb
+++ b/test/-ext-/funcall/test_passing_block.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestFuncall < Test::Unit::TestCase
diff --git a/test/-ext-/gvl/test_last_thread.rb b/test/-ext-/gvl/test_last_thread.rb
index cf5f28f4b6..3b297a5b31 100644
--- a/test/-ext-/gvl/test_last_thread.rb
+++ b/test/-ext-/gvl/test_last_thread.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
class TestLastThread < Test::Unit::TestCase
# [Bug #11237]
diff --git a/test/-ext-/hash/test_delete.rb b/test/-ext-/hash/test_delete.rb
index 13f3595482..e2ad3cbdbc 100644
--- a/test/-ext-/hash/test_delete.rb
+++ b/test/-ext-/hash/test_delete.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require '-test-/hash'
diff --git a/test/-ext-/iseq_load/test_iseq_load.rb b/test/-ext-/iseq_load/test_iseq_load.rb
index 5dfd69a863..7eb8f4bfc8 100644
--- a/test/-ext-/iseq_load/test_iseq_load.rb
+++ b/test/-ext-/iseq_load/test_iseq_load.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestIseqLoad < Test::Unit::TestCase
diff --git a/test/-ext-/iter/test_iter_break.rb b/test/-ext-/iter/test_iter_break.rb
index 5bac6331fd..8c2379960a 100644
--- a/test/-ext-/iter/test_iter_break.rb
+++ b/test/-ext-/iter/test_iter_break.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require '-test-/iter'
diff --git a/test/-ext-/iter/test_yield_block.rb b/test/-ext-/iter/test_yield_block.rb
index bec993c950..d4f1fa3c35 100644
--- a/test/-ext-/iter/test_yield_block.rb
+++ b/test/-ext-/iter/test_yield_block.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require '-test-/iter'
diff --git a/test/-ext-/load/test_dot_dot.rb b/test/-ext-/load/test_dot_dot.rb
index 82aa10a95f..1b2c871608 100644
--- a/test/-ext-/load/test_dot_dot.rb
+++ b/test/-ext-/load/test_dot_dot.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class Test_DotDot < Test::Unit::TestCase
diff --git a/test/-ext-/marshal/test_internal_ivar.rb b/test/-ext-/marshal/test_internal_ivar.rb
index e0e2a72f54..51529667b5 100644
--- a/test/-ext-/marshal/test_internal_ivar.rb
+++ b/test/-ext-/marshal/test_internal_ivar.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require '-test-/marshal/internal_ivar'
diff --git a/test/-ext-/marshal/test_usrmarshal.rb b/test/-ext-/marshal/test_usrmarshal.rb
index 8d8db012ac..263dcb8297 100644
--- a/test/-ext-/marshal/test_usrmarshal.rb
+++ b/test/-ext-/marshal/test_usrmarshal.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require '-test-/marshal/usr'
diff --git a/test/-ext-/method/test_arity.rb b/test/-ext-/method/test_arity.rb
index 79ef23b34f..d0032c6a50 100644
--- a/test/-ext-/method/test_arity.rb
+++ b/test/-ext-/method/test_arity.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require '-test-/method'
require 'test/unit'
diff --git a/test/-ext-/num2int/test_num2int.rb b/test/-ext-/num2int/test_num2int.rb
index f579659929..c00bb56833 100644
--- a/test/-ext-/num2int/test_num2int.rb
+++ b/test/-ext-/num2int/test_num2int.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require '-test-/num2int/num2int'
diff --git a/test/-ext-/path_to_class/test_path_to_class.rb b/test/-ext-/path_to_class/test_path_to_class.rb
index fdf4097fde..57e3a9233a 100644
--- a/test/-ext-/path_to_class/test_path_to_class.rb
+++ b/test/-ext-/path_to_class/test_path_to_class.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class Test_PathToClass < Test::Unit::TestCase
diff --git a/test/-ext-/popen_deadlock/test_popen_deadlock.rb b/test/-ext-/popen_deadlock/test_popen_deadlock.rb
index 60ec6ccce4..97892e5008 100644
--- a/test/-ext-/popen_deadlock/test_popen_deadlock.rb
+++ b/test/-ext-/popen_deadlock/test_popen_deadlock.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require '-test-/popen_deadlock/infinite_loop_dlsym'
rescue LoadError
diff --git a/test/-ext-/postponed_job/test_postponed_job.rb b/test/-ext-/postponed_job/test_postponed_job.rb
index 032e35c055..da3b579eba 100644
--- a/test/-ext-/postponed_job/test_postponed_job.rb
+++ b/test/-ext-/postponed_job/test_postponed_job.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'thread'
require '-test-/postponed_job'
diff --git a/test/-ext-/proc/test_bmethod.rb b/test/-ext-/proc/test_bmethod.rb
index 16927dcf7d..344f975755 100644
--- a/test/-ext-/proc/test_bmethod.rb
+++ b/test/-ext-/proc/test_bmethod.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require '-test-/proc'
diff --git a/test/-ext-/rational/test_rat.rb b/test/-ext-/rational/test_rat.rb
index ef7e7fe535..626ffb9661 100644
--- a/test/-ext-/rational/test_rat.rb
+++ b/test/-ext-/rational/test_rat.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/rational"
diff --git a/test/-ext-/st/test_foreach.rb b/test/-ext-/st/test_foreach.rb
index 259b0a93b1..4b3eb870e4 100644
--- a/test/-ext-/st/test_foreach.rb
+++ b/test/-ext-/st/test_foreach.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require '-test-/st/foreach'
diff --git a/test/-ext-/st/test_numhash.rb b/test/-ext-/st/test_numhash.rb
index 24dc87c1d9..97c3a755bb 100644
--- a/test/-ext-/st/test_numhash.rb
+++ b/test/-ext-/st/test_numhash.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/st/numhash"
diff --git a/test/-ext-/st/test_update.rb b/test/-ext-/st/test_update.rb
index 1b41d2bc03..db86eeb8d7 100644
--- a/test/-ext-/st/test_update.rb
+++ b/test/-ext-/st/test_update.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/st/update"
diff --git a/test/-ext-/string/test_coderange.rb b/test/-ext-/string/test_coderange.rb
index 31f5c871f5..18b256fcea 100644
--- a/test/-ext-/string/test_coderange.rb
+++ b/test/-ext-/string/test_coderange.rb
@@ -1,4 +1,5 @@
# coding: ascii-8bit
+# frozen_string_literal: false
require 'test/unit'
require "-test-/string"
require "rbconfig/sizeof"
diff --git a/test/-ext-/string/test_cstr.rb b/test/-ext-/string/test_cstr.rb
index 4be2cc98fa..f4ed520b2d 100644
--- a/test/-ext-/string/test_cstr.rb
+++ b/test/-ext-/string/test_cstr.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/string"
diff --git a/test/-ext-/string/test_ellipsize.rb b/test/-ext-/string/test_ellipsize.rb
index 23ccdb515b..d7947041d5 100644
--- a/test/-ext-/string/test_ellipsize.rb
+++ b/test/-ext-/string/test_ellipsize.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/string"
diff --git a/test/-ext-/string/test_enc_associate.rb b/test/-ext-/string/test_enc_associate.rb
index 2c84f49db1..4fad8e1cc8 100644
--- a/test/-ext-/string/test_enc_associate.rb
+++ b/test/-ext-/string/test_enc_associate.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/string"
diff --git a/test/-ext-/string/test_enc_str_buf_cat.rb b/test/-ext-/string/test_enc_str_buf_cat.rb
index c925affb41..72f903903c 100644
--- a/test/-ext-/string/test_enc_str_buf_cat.rb
+++ b/test/-ext-/string/test_enc_str_buf_cat.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/string"
diff --git a/test/-ext-/string/test_fstring.rb b/test/-ext-/string/test_fstring.rb
index 3ad9a4c312..39ed020892 100644
--- a/test/-ext-/string/test_fstring.rb
+++ b/test/-ext-/string/test_fstring.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require '-test-/string'
diff --git a/test/-ext-/string/test_modify_expand.rb b/test/-ext-/string/test_modify_expand.rb
index cc19a47b91..5eb7a02b91 100644
--- a/test/-ext-/string/test_modify_expand.rb
+++ b/test/-ext-/string/test_modify_expand.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/string"
diff --git a/test/-ext-/string/test_nofree.rb b/test/-ext-/string/test_nofree.rb
index cb034a4b8f..86681e4652 100644
--- a/test/-ext-/string/test_nofree.rb
+++ b/test/-ext-/string/test_nofree.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class Test_StringNoFree < Test::Unit::TestCase
diff --git a/test/-ext-/string/test_normalize.rb b/test/-ext-/string/test_normalize.rb
index b270a45005..8c11bfe3d4 100644
--- a/test/-ext-/string/test_normalize.rb
+++ b/test/-ext-/string/test_normalize.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/string"
require "tempfile"
diff --git a/test/-ext-/string/test_qsort.rb b/test/-ext-/string/test_qsort.rb
index 1a6dae0124..94aff8c3c4 100644
--- a/test/-ext-/string/test_qsort.rb
+++ b/test/-ext-/string/test_qsort.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/string"
diff --git a/test/-ext-/string/test_set_len.rb b/test/-ext-/string/test_set_len.rb
index 198129d72f..1c5252a5f6 100644
--- a/test/-ext-/string/test_set_len.rb
+++ b/test/-ext-/string/test_set_len.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/string"
diff --git a/test/-ext-/struct/test_member.rb b/test/-ext-/struct/test_member.rb
index 18e98085a0..5ee0adcf67 100644
--- a/test/-ext-/struct/test_member.rb
+++ b/test/-ext-/struct/test_member.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/struct"
diff --git a/test/-ext-/symbol/test_inadvertent_creation.rb b/test/-ext-/symbol/test_inadvertent_creation.rb
index 14afc90d74..073952fae3 100644
--- a/test/-ext-/symbol/test_inadvertent_creation.rb
+++ b/test/-ext-/symbol/test_inadvertent_creation.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/symbol"
diff --git a/test/-ext-/symbol/test_type.rb b/test/-ext-/symbol/test_type.rb
index ddd79561ab..32a700d273 100644
--- a/test/-ext-/symbol/test_type.rb
+++ b/test/-ext-/symbol/test_type.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/symbol"
diff --git a/test/-ext-/test_bug-3571.rb b/test/-ext-/test_bug-3571.rb
index d7c26d1ff0..dc9c92bd23 100644
--- a/test/-ext-/test_bug-3571.rb
+++ b/test/-ext-/test_bug-3571.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class Test_BUG_3571 < Test::Unit::TestCase
diff --git a/test/-ext-/test_bug-5832.rb b/test/-ext-/test_bug-5832.rb
index 11f8a52a95..6812e64e5e 100644
--- a/test/-ext-/test_bug-5832.rb
+++ b/test/-ext-/test_bug-5832.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require '-test-/bug-5832/bug'
class Test_BUG_5832 < Test::Unit::TestCase
diff --git a/test/-ext-/test_notimplement.rb b/test/-ext-/test_notimplement.rb
index 7394126fb1..0eba7bdaf8 100644
--- a/test/-ext-/test_notimplement.rb
+++ b/test/-ext-/test_notimplement.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require '-test-/notimplement'
class TestNotImplement < Test::Unit::TestCase
diff --git a/test/-ext-/test_printf.rb b/test/-ext-/test_printf.rb
index 1f06ad6300..4e4f5b4695 100644
--- a/test/-ext-/test_printf.rb
+++ b/test/-ext-/test_printf.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/printf"
require_relative '../ruby/allpairs'
diff --git a/test/-ext-/test_recursion.rb b/test/-ext-/test_recursion.rb
index 06faf6dc7a..db7a853988 100644
--- a/test/-ext-/test_recursion.rb
+++ b/test/-ext-/test_recursion.rb
@@ -1,4 +1,5 @@
# -*- coding: us-ascii -*-
+# frozen_string_literal: false
require 'test/unit'
class TestRecursion < Test::Unit::TestCase
diff --git a/test/-ext-/time/test_new.rb b/test/-ext-/time/test_new.rb
index 5ccf6f0a5d..699201fda5 100644
--- a/test/-ext-/time/test_new.rb
+++ b/test/-ext-/time/test_new.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/time"
diff --git a/test/-ext-/tracepoint/test_tracepoint.rb b/test/-ext-/tracepoint/test_tracepoint.rb
index b5a6e769d6..33d0c3e8e1 100644
--- a/test/-ext-/tracepoint/test_tracepoint.rb
+++ b/test/-ext-/tracepoint/test_tracepoint.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require '-test-/tracepoint'
diff --git a/test/-ext-/typeddata/test_typeddata.rb b/test/-ext-/typeddata/test_typeddata.rb
index 31fe32b20a..058b7b70c5 100644
--- a/test/-ext-/typeddata/test_typeddata.rb
+++ b/test/-ext-/typeddata/test_typeddata.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "-test-/typeddata/typeddata"
diff --git a/test/-ext-/wait_for_single_fd/test_wait_for_single_fd.rb b/test/-ext-/wait_for_single_fd/test_wait_for_single_fd.rb
index e88dbefac6..d9fc52ebb2 100644
--- a/test/-ext-/wait_for_single_fd/test_wait_for_single_fd.rb
+++ b/test/-ext-/wait_for_single_fd/test_wait_for_single_fd.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestWaitForSingleFD < Test::Unit::TestCase
diff --git a/test/-ext-/win32/test_console_attr.rb b/test/-ext-/win32/test_console_attr.rb
index 3afb2d9378..e596e13469 100644
--- a/test/-ext-/win32/test_console_attr.rb
+++ b/test/-ext-/win32/test_console_attr.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
if /mswin|mingw/ =~ RUBY_PLATFORM and STDOUT.tty?
require '-test-/win32/console'
require 'io/console'
diff --git a/test/-ext-/win32/test_dln.rb b/test/-ext-/win32/test_dln.rb
index fe289d150f..fd5e453719 100644
--- a/test/-ext-/win32/test_dln.rb
+++ b/test/-ext-/win32/test_dln.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'tmpdir'
require 'rbconfig'
diff --git a/test/-ext-/win32/test_fd_setsize.rb b/test/-ext-/win32/test_fd_setsize.rb
index 6fe889c941..4c64376f15 100644
--- a/test/-ext-/win32/test_fd_setsize.rb
+++ b/test/-ext-/win32/test_fd_setsize.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
module Bug
diff --git a/test/base64/test_base64.rb b/test/base64/test_base64.rb
index c2cd60adcd..8e11bef9a6 100644
--- a/test/base64/test_base64.rb
+++ b/test/base64/test_base64.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require "test/unit"
require "base64"
diff --git a/test/benchmark/test_benchmark.rb b/test/benchmark/test_benchmark.rb
index 1b9964eafa..2db148304c 100644
--- a/test/benchmark/test_benchmark.rb
+++ b/test/benchmark/test_benchmark.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'benchmark'
diff --git a/test/bigdecimal/test_bigdecimal.rb b/test/bigdecimal/test_bigdecimal.rb
index edbaa163b4..f10c50b47a 100644
--- a/test/bigdecimal/test_bigdecimal.rb
+++ b/test/bigdecimal/test_bigdecimal.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "testbase"
require 'bigdecimal/math'
diff --git a/test/bigdecimal/test_bigdecimal_util.rb b/test/bigdecimal/test_bigdecimal_util.rb
index e4d64006ab..c3a45b2eee 100644
--- a/test/bigdecimal/test_bigdecimal_util.rb
+++ b/test/bigdecimal/test_bigdecimal_util.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "testbase"
require 'bigdecimal/util'
diff --git a/test/bigdecimal/test_bigmath.rb b/test/bigdecimal/test_bigmath.rb
index 740c755eae..6f271d0960 100644
--- a/test/bigdecimal/test_bigmath.rb
+++ b/test/bigdecimal/test_bigmath.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "testbase"
require "bigdecimal/math"
diff --git a/test/bigdecimal/testbase.rb b/test/bigdecimal/testbase.rb
index c014e61e92..22b05f09ae 100644
--- a/test/bigdecimal/testbase.rb
+++ b/test/bigdecimal/testbase.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "bigdecimal"
diff --git a/test/cgi/test_cgi_cookie.rb b/test/cgi/test_cgi_cookie.rb
index eee6215fac..ae7b14a4dd 100644
--- a/test/cgi/test_cgi_cookie.rb
+++ b/test/cgi/test_cgi_cookie.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'cgi'
require 'stringio'
diff --git a/test/cgi/test_cgi_core.rb b/test/cgi/test_cgi_core.rb
index 68e008d3f1..97308a0457 100644
--- a/test/cgi/test_cgi_core.rb
+++ b/test/cgi/test_cgi_core.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'cgi'
require 'stringio'
diff --git a/test/cgi/test_cgi_header.rb b/test/cgi/test_cgi_header.rb
index 91086c4f27..b1a0b41856 100644
--- a/test/cgi/test_cgi_header.rb
+++ b/test/cgi/test_cgi_header.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'cgi'
require 'time'
diff --git a/test/cgi/test_cgi_modruby.rb b/test/cgi/test_cgi_modruby.rb
index ed1d519bae..9813a95277 100644
--- a/test/cgi/test_cgi_modruby.rb
+++ b/test/cgi/test_cgi_modruby.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'cgi'
require_relative 'update_env'
diff --git a/test/cgi/test_cgi_multipart.rb b/test/cgi/test_cgi_multipart.rb
index b3df694849..f63c2e3778 100644
--- a/test/cgi/test_cgi_multipart.rb
+++ b/test/cgi/test_cgi_multipart.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'cgi'
require 'tempfile'
diff --git a/test/cgi/test_cgi_session.rb b/test/cgi/test_cgi_session.rb
index c2d7bdc60d..59e8d4c15b 100644
--- a/test/cgi/test_cgi_session.rb
+++ b/test/cgi/test_cgi_session.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'cgi'
require 'cgi/session'
diff --git a/test/cgi/test_cgi_tag_helper.rb b/test/cgi/test_cgi_tag_helper.rb
index cc119cb1bc..a48bafdaec 100644
--- a/test/cgi/test_cgi_tag_helper.rb
+++ b/test/cgi/test_cgi_tag_helper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'cgi'
require 'stringio'
diff --git a/test/cgi/test_cgi_util.rb b/test/cgi/test_cgi_util.rb
index 2c5182b524..5662a30eff 100644
--- a/test/cgi/test_cgi_util.rb
+++ b/test/cgi/test_cgi_util.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'cgi'
require 'stringio'
diff --git a/test/cgi/update_env.rb b/test/cgi/update_env.rb
index 0cd926d7af..cbc8dc13c6 100644
--- a/test/cgi/update_env.rb
+++ b/test/cgi/update_env.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
module UpdateEnv
def update_env(environ)
environ.each do |key, val|
diff --git a/test/coverage/test_coverage.rb b/test/coverage/test_coverage.rb
index b7a7ea7dab..4870b1006a 100644
--- a/test/coverage/test_coverage.rb
+++ b/test/coverage/test_coverage.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "coverage"
require "tmpdir"
diff --git a/test/csv/base.rb b/test/csv/base.rb
index 621569e013..a282c7afed 100644
--- a/test/csv/base.rb
+++ b/test/csv/base.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "csv"
diff --git a/test/csv/test_csv_parsing.rb b/test/csv/test_csv_parsing.rb
index 319f3f392f..ff3d65fd24 100755
--- a/test/csv/test_csv_parsing.rb
+++ b/test/csv/test_csv_parsing.rb
@@ -1,5 +1,6 @@
#!/usr/bin/env ruby -w
# encoding: UTF-8
+# frozen_string_literal: false
# tc_csv_parsing.rb
#
diff --git a/test/csv/test_csv_writing.rb b/test/csv/test_csv_writing.rb
index 704c1d7ddc..de82dae244 100755
--- a/test/csv/test_csv_writing.rb
+++ b/test/csv/test_csv_writing.rb
@@ -1,5 +1,6 @@
#!/usr/bin/env ruby -w
# encoding: UTF-8
+# frozen_string_literal: false
# tc_csv_writing.rb
#
diff --git a/test/csv/test_data_converters.rb b/test/csv/test_data_converters.rb
index 89b6dd1dfd..70f996360c 100755
--- a/test/csv/test_data_converters.rb
+++ b/test/csv/test_data_converters.rb
@@ -1,5 +1,6 @@
#!/usr/bin/env ruby -w
# encoding: UTF-8
+# frozen_string_literal: false
# tc_data_converters.rb
#
diff --git a/test/csv/test_encodings.rb b/test/csv/test_encodings.rb
index dc45692ce4..7460a3ff34 100755
--- a/test/csv/test_encodings.rb
+++ b/test/csv/test_encodings.rb
@@ -1,5 +1,6 @@
#!/usr/bin/env ruby -w
# encoding: UTF-8
+# frozen_string_literal: false
# tc_encodings.rb
#
diff --git a/test/csv/test_features.rb b/test/csv/test_features.rb
index e31465710b..37fdab8636 100755
--- a/test/csv/test_features.rb
+++ b/test/csv/test_features.rb
@@ -1,5 +1,6 @@
#!/usr/bin/env ruby -w
# encoding: UTF-8
+# frozen_string_literal: false
# tc_features.rb
#
diff --git a/test/csv/test_headers.rb b/test/csv/test_headers.rb
index 79ccd20c74..d8a1c15836 100755
--- a/test/csv/test_headers.rb
+++ b/test/csv/test_headers.rb
@@ -1,5 +1,6 @@
#!/usr/bin/env ruby -w
# encoding: UTF-8
+# frozen_string_literal: false
# tc_headers.rb
#
diff --git a/test/csv/test_interface.rb b/test/csv/test_interface.rb
index d6bf470f6b..a12545c8b0 100755
--- a/test/csv/test_interface.rb
+++ b/test/csv/test_interface.rb
@@ -1,5 +1,6 @@
#!/usr/bin/env ruby -w
# encoding: UTF-8
+# frozen_string_literal: false
# tc_interface.rb
#
diff --git a/test/csv/test_row.rb b/test/csv/test_row.rb
index a8aeb288fc..1fa15d392a 100755
--- a/test/csv/test_row.rb
+++ b/test/csv/test_row.rb
@@ -1,5 +1,6 @@
#!/usr/bin/env ruby -w
# encoding: UTF-8
+# frozen_string_literal: false
# tc_row.rb
#
diff --git a/test/csv/test_table.rb b/test/csv/test_table.rb
index 7d2148c379..80e553e83f 100755
--- a/test/csv/test_table.rb
+++ b/test/csv/test_table.rb
@@ -1,5 +1,6 @@
#!/usr/bin/env ruby -w
# encoding: UTF-8
+# frozen_string_literal: false
# tc_table.rb
#
diff --git a/test/csv/ts_all.rb b/test/csv/ts_all.rb
index 389384168b..9eadf12918 100644
--- a/test/csv/ts_all.rb
+++ b/test/csv/ts_all.rb
@@ -1,5 +1,6 @@
#!/usr/bin/env ruby -w
# encoding: UTF-8
+# frozen_string_literal: false
# ts_all.rb
#
diff --git a/test/date/test_date.rb b/test/date/test_date.rb
index 3d8bf868c4..3bb1f4a4c7 100644
--- a/test/date/test_date.rb
+++ b/test/date/test_date.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'date'
diff --git a/test/date/test_date_arith.rb b/test/date/test_date_arith.rb
index 7b79c18097..f5ac5bf30b 100644
--- a/test/date/test_date_arith.rb
+++ b/test/date/test_date_arith.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'date'
diff --git a/test/date/test_date_attr.rb b/test/date/test_date_attr.rb
index bc6bec2a80..3d1b0a2e6e 100644
--- a/test/date/test_date_attr.rb
+++ b/test/date/test_date_attr.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'date'
diff --git a/test/date/test_date_base.rb b/test/date/test_date_base.rb
index 1f3d8c0a55..06fec19e52 100644
--- a/test/date/test_date_base.rb
+++ b/test/date/test_date_base.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'date'
diff --git a/test/date/test_date_compat.rb b/test/date/test_date_compat.rb
index 8284007407..1bd30b5f80 100644
--- a/test/date/test_date_compat.rb
+++ b/test/date/test_date_compat.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'date'
diff --git a/test/date/test_date_conv.rb b/test/date/test_date_conv.rb
index daf0374294..8b99970dd7 100644
--- a/test/date/test_date_conv.rb
+++ b/test/date/test_date_conv.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'date'
diff --git a/test/date/test_date_marshal.rb b/test/date/test_date_marshal.rb
index 4ea5565716..27ae1e9004 100644
--- a/test/date/test_date_marshal.rb
+++ b/test/date/test_date_marshal.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'date'
diff --git a/test/date/test_date_new.rb b/test/date/test_date_new.rb
index 0bbbfee44b..80ecbc204e 100644
--- a/test/date/test_date_new.rb
+++ b/test/date/test_date_new.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'date'
diff --git a/test/date/test_date_parse.rb b/test/date/test_date_parse.rb
index e0cd6025a8..d980674591 100644
--- a/test/date/test_date_parse.rb
+++ b/test/date/test_date_parse.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'date'
diff --git a/test/date/test_date_strftime.rb b/test/date/test_date_strftime.rb
index 0ed9215e1e..7472a4323d 100644
--- a/test/date/test_date_strftime.rb
+++ b/test/date/test_date_strftime.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'date'
diff --git a/test/date/test_date_strptime.rb b/test/date/test_date_strptime.rb
index ae149bb8d8..15fdc949f5 100644
--- a/test/date/test_date_strptime.rb
+++ b/test/date/test_date_strptime.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'date'
diff --git a/test/date/test_switch_hitter.rb b/test/date/test_switch_hitter.rb
index 08e23015dc..931d736edf 100644
--- a/test/date/test_switch_hitter.rb
+++ b/test/date/test_switch_hitter.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'date'
diff --git a/test/dbm/test_dbm.rb b/test/dbm/test_dbm.rb
index c783b497d8..cd8c3fd8d3 100644
--- a/test/dbm/test_dbm.rb
+++ b/test/dbm/test_dbm.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'tmpdir'
diff --git a/test/digest/digest/foo.rb b/test/digest/digest/foo.rb
index d576ef00e0..6d42b003fb 100644
--- a/test/digest/digest/foo.rb
+++ b/test/digest/digest/foo.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
module Digest
Foo = nil
diff --git a/test/digest/test_digest.rb b/test/digest/test_digest.rb
index ccf0a26b90..039c1701cb 100644
--- a/test/digest/test_digest.rb
+++ b/test/digest/test_digest.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
# $RoughId: test.rb,v 1.4 2001/07/13 15:38:27 knu Exp $
# $Id$
diff --git a/test/digest/test_digest_extend.rb b/test/digest/test_digest_extend.rb
index 46158a670c..9dd026b5e3 100644
--- a/test/digest/test_digest_extend.rb
+++ b/test/digest/test_digest_extend.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'digest'
require_relative '../lib/with_different_ofs.rb'
diff --git a/test/drb/drbtest.rb b/test/drb/drbtest.rb
index 11b542a4ee..4488e1be21 100644
--- a/test/drb/drbtest.rb
+++ b/test/drb/drbtest.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'drb/drb'
require 'drb/extservm'
diff --git a/test/drb/ignore_test_drb.rb b/test/drb/ignore_test_drb.rb
index 8b94650534..996a554c0f 100644
--- a/test/drb/ignore_test_drb.rb
+++ b/test/drb/ignore_test_drb.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'drbtest'
module DRbTests
diff --git a/test/drb/test_acl.rb b/test/drb/test_acl.rb
index a1ee1d48c5..c886ae2396 100644
--- a/test/drb/test_acl.rb
+++ b/test/drb/test_acl.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
# acltest.rb - ACL unit test
# Copyright (c) 2000 Masatoshi SEKI
#
diff --git a/test/drb/test_drb.rb b/test/drb/test_drb.rb
index 016e62f7c6..dd2855e3b0 100644
--- a/test/drb/test_drb.rb
+++ b/test/drb/test_drb.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'drbtest'
module DRbTests
diff --git a/test/drb/test_drbssl.rb b/test/drb/test_drbssl.rb
index bcf5f9034a..1f1495356e 100644
--- a/test/drb/test_drbssl.rb
+++ b/test/drb/test_drbssl.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'drbtest'
begin
diff --git a/test/drb/test_drbunix.rb b/test/drb/test_drbunix.rb
index c422b7a689..7ece2453a9 100644
--- a/test/drb/test_drbunix.rb
+++ b/test/drb/test_drbunix.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'drbtest'
begin
diff --git a/test/drb/ut_array.rb b/test/drb/ut_array.rb
index 01599f1d89..d13dda3d8e 100644
--- a/test/drb/ut_array.rb
+++ b/test/drb/ut_array.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'drb/drb'
require 'drb/extserv'
diff --git a/test/drb/ut_array_drbssl.rb b/test/drb/ut_array_drbssl.rb
index fa9afa6abd..08849ca176 100644
--- a/test/drb/ut_array_drbssl.rb
+++ b/test/drb/ut_array_drbssl.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'drb/drb'
require 'drb/extserv'
require 'drb/ssl'
diff --git a/test/drb/ut_array_drbunix.rb b/test/drb/ut_array_drbunix.rb
index dd397907c7..b656cdaddd 100644
--- a/test/drb/ut_array_drbunix.rb
+++ b/test/drb/ut_array_drbunix.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'drb/drb'
require 'drb/extserv'
diff --git a/test/drb/ut_drb.rb b/test/drb/ut_drb.rb
index 0dd0988a7d..6a94a0fb40 100644
--- a/test/drb/ut_drb.rb
+++ b/test/drb/ut_drb.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'drb/drb'
require 'drb/extserv'
require 'timeout'
diff --git a/test/drb/ut_drb_drbssl.rb b/test/drb/ut_drb_drbssl.rb
index b6d1c12262..ddaa859e7d 100644
--- a/test/drb/ut_drb_drbssl.rb
+++ b/test/drb/ut_drb_drbssl.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "ut_drb"
require 'drb/ssl'
diff --git a/test/drb/ut_drb_drbunix.rb b/test/drb/ut_drb_drbunix.rb
index c997d2469d..ecf0920451 100644
--- a/test/drb/ut_drb_drbunix.rb
+++ b/test/drb/ut_drb_drbunix.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "#{File.dirname(File.expand_path(__FILE__))}/ut_drb"
if __FILE__ == $0
diff --git a/test/drb/ut_eq.rb b/test/drb/ut_eq.rb
index cc86158363..56285a384f 100644
--- a/test/drb/ut_eq.rb
+++ b/test/drb/ut_eq.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'drb/drb'
require 'drb/extserv'
diff --git a/test/drb/ut_eval.rb b/test/drb/ut_eval.rb
index c456790fd9..0a81b40b0e 100644
--- a/test/drb/ut_eval.rb
+++ b/test/drb/ut_eval.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'drb/drb'
require 'drb/extserv'
diff --git a/test/drb/ut_large.rb b/test/drb/ut_large.rb
index c2fbd3e184..c00279e7cb 100644
--- a/test/drb/ut_large.rb
+++ b/test/drb/ut_large.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'drb/drb'
require 'drb/extserv'
require 'timeout'
diff --git a/test/drb/ut_port.rb b/test/drb/ut_port.rb
index 3009db5acd..d317a307cc 100644
--- a/test/drb/ut_port.rb
+++ b/test/drb/ut_port.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'drb/drb'
require 'drb/extserv'
diff --git a/test/drb/ut_safe1.rb b/test/drb/ut_safe1.rb
index 43eb367689..4b16fa7d6d 100644
--- a/test/drb/ut_safe1.rb
+++ b/test/drb/ut_safe1.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'drb/drb'
require 'drb/extserv'
diff --git a/test/drb/ut_timerholder.rb b/test/drb/ut_timerholder.rb
index 6c62ea7726..1b992d95f3 100644
--- a/test/drb/ut_timerholder.rb
+++ b/test/drb/ut_timerholder.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'runit/testcase'
require 'runit/cui/testrunner'
require 'timerholder'
diff --git a/test/dtrace/dummy.rb b/test/dtrace/dummy.rb
index e85614228c..932cb4e625 100644
--- a/test/dtrace/dummy.rb
+++ b/test/dtrace/dummy.rb
@@ -1 +1,2 @@
+# frozen_string_literal: false
# this is a dummy file used by test/dtrace/test_require.rb
diff --git a/test/dtrace/helper.rb b/test/dtrace/helper.rb
index f76c41b025..a479b1adb7 100644
--- a/test/dtrace/helper.rb
+++ b/test/dtrace/helper.rb
@@ -1,4 +1,5 @@
# -*- coding: us-ascii -*-
+# frozen_string_literal: false
require 'test/unit'
require 'tempfile'
diff --git a/test/dtrace/test_array_create.rb b/test/dtrace/test_array_create.rb
index d849bcc0c7..44d4657b61 100644
--- a/test/dtrace/test_array_create.rb
+++ b/test/dtrace/test_array_create.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module DTrace
diff --git a/test/dtrace/test_cmethod.rb b/test/dtrace/test_cmethod.rb
index 0a9107fa38..a0aa1b646b 100644
--- a/test/dtrace/test_cmethod.rb
+++ b/test/dtrace/test_cmethod.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module DTrace
diff --git a/test/dtrace/test_function_entry.rb b/test/dtrace/test_function_entry.rb
index 74aee64b02..fc07ccc455 100644
--- a/test/dtrace/test_function_entry.rb
+++ b/test/dtrace/test_function_entry.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module DTrace
diff --git a/test/dtrace/test_gc.rb b/test/dtrace/test_gc.rb
index 2f58a11096..77de7998dd 100644
--- a/test/dtrace/test_gc.rb
+++ b/test/dtrace/test_gc.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module DTrace
diff --git a/test/dtrace/test_hash_create.rb b/test/dtrace/test_hash_create.rb
index 2cceded38f..83a4d0062c 100644
--- a/test/dtrace/test_hash_create.rb
+++ b/test/dtrace/test_hash_create.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module DTrace
diff --git a/test/dtrace/test_load.rb b/test/dtrace/test_load.rb
index cceb0c2925..1c208bd488 100644
--- a/test/dtrace/test_load.rb
+++ b/test/dtrace/test_load.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
require 'tempfile'
diff --git a/test/dtrace/test_method_cache.rb b/test/dtrace/test_method_cache.rb
index d8ddf454f4..7ecec194b2 100644
--- a/test/dtrace/test_method_cache.rb
+++ b/test/dtrace/test_method_cache.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module DTrace
diff --git a/test/dtrace/test_object_create_start.rb b/test/dtrace/test_object_create_start.rb
index 2be9611613..81f8ed2110 100644
--- a/test/dtrace/test_object_create_start.rb
+++ b/test/dtrace/test_object_create_start.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module DTrace
diff --git a/test/dtrace/test_raise.rb b/test/dtrace/test_raise.rb
index 48fdbf14d1..81e64e8c16 100644
--- a/test/dtrace/test_raise.rb
+++ b/test/dtrace/test_raise.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module DTrace
diff --git a/test/dtrace/test_require.rb b/test/dtrace/test_require.rb
index 46a1d7652a..9fa6c0e87c 100644
--- a/test/dtrace/test_require.rb
+++ b/test/dtrace/test_require.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module DTrace
diff --git a/test/dtrace/test_singleton_function.rb b/test/dtrace/test_singleton_function.rb
index 9e118f65b7..3698a02c93 100644
--- a/test/dtrace/test_singleton_function.rb
+++ b/test/dtrace/test_singleton_function.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module DTrace
diff --git a/test/dtrace/test_string.rb b/test/dtrace/test_string.rb
index 873d5ac364..407280b1fc 100644
--- a/test/dtrace/test_string.rb
+++ b/test/dtrace/test_string.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module DTrace
diff --git a/test/erb/test_erb.rb b/test/erb/test_erb.rb
index 1f1253fd23..4e2d49a866 100644
--- a/test/erb/test_erb.rb
+++ b/test/erb/test_erb.rb
@@ -1,4 +1,5 @@
# -*- coding: us-ascii -*-
+# frozen_string_literal: false
require 'test/unit'
require 'erb'
diff --git a/test/erb/test_erb_command.rb b/test/erb/test_erb_command.rb
index abc8fdbe25..406b14cdb3 100644
--- a/test/erb/test_erb_command.rb
+++ b/test/erb/test_erb_command.rb
@@ -1,4 +1,5 @@
# -*- coding: us-ascii -*-
+# frozen_string_literal: false
require 'test/unit'
class TestErbCommand < Test::Unit::TestCase
diff --git a/test/erb/test_erb_m17n.rb b/test/erb/test_erb_m17n.rb
index f60dd103f6..a7840c9605 100644
--- a/test/erb/test_erb_m17n.rb
+++ b/test/erb/test_erb_m17n.rb
@@ -1,4 +1,5 @@
# -*- coding: utf-8 -*-
+# frozen_string_literal: false
require 'test/unit'
require 'erb'
diff --git a/test/etc/test_etc.rb b/test/etc/test_etc.rb
index 5ac09a781b..ec9083eb16 100644
--- a/test/etc/test_etc.rb
+++ b/test/etc/test_etc.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "etc"
diff --git a/test/excludes/TestException.rb b/test/excludes/TestException.rb
index 78ee4ca1c0..a992950152 100644
--- a/test/excludes/TestException.rb
+++ b/test/excludes/TestException.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
reason = %[\
Because machine stack overflow can happen anywhere, even critical
sections including external libraries, it is very neary impossible to
diff --git a/test/excludes/TestIO_Console.rb b/test/excludes/TestIO_Console.rb
index 26780c01b1..caf1935fec 100644
--- a/test/excludes/TestIO_Console.rb
+++ b/test/excludes/TestIO_Console.rb
@@ -1 +1,2 @@
+# frozen_string_literal: false
exclude(:test_getpass, 'not portable')
diff --git a/test/excludes/TestThread.rb b/test/excludes/TestThread.rb
index 0b4050b4eb..ea73a4c010 100644
--- a/test/excludes/TestThread.rb
+++ b/test/excludes/TestThread.rb
@@ -1 +1,2 @@
+# frozen_string_literal: false
exclude(/_stack_size$/, 'often too expensive')
diff --git a/test/fiddle/helper.rb b/test/fiddle/helper.rb
index 0952cc2438..1da3d93819 100644
--- a/test/fiddle/helper.rb
+++ b/test/fiddle/helper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'minitest/autorun'
require 'fiddle'
diff --git a/test/fiddle/test_c_struct_entry.rb b/test/fiddle/test_c_struct_entry.rb
index de5449b43d..39b7aeff99 100644
--- a/test/fiddle/test_c_struct_entry.rb
+++ b/test/fiddle/test_c_struct_entry.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require_relative 'helper'
require 'fiddle/struct'
diff --git a/test/fiddle/test_c_union_entity.rb b/test/fiddle/test_c_union_entity.rb
index 165c4ecacb..3c4d538ff1 100644
--- a/test/fiddle/test_c_union_entity.rb
+++ b/test/fiddle/test_c_union_entity.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require_relative 'helper'
require 'fiddle/struct'
diff --git a/test/fiddle/test_closure.rb b/test/fiddle/test_closure.rb
index 56839e7b63..0e3574ff84 100644
--- a/test/fiddle/test_closure.rb
+++ b/test/fiddle/test_closure.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require_relative 'helper'
rescue LoadError
diff --git a/test/fiddle/test_cparser.rb b/test/fiddle/test_cparser.rb
index 4d4799d8d6..16134f5aa7 100644
--- a/test/fiddle/test_cparser.rb
+++ b/test/fiddle/test_cparser.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require_relative 'helper'
require 'fiddle/cparser'
diff --git a/test/fiddle/test_fiddle.rb b/test/fiddle/test_fiddle.rb
index 4c6ab97b12..cf4839af86 100644
--- a/test/fiddle/test_fiddle.rb
+++ b/test/fiddle/test_fiddle.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require_relative 'helper'
rescue LoadError
diff --git a/test/fiddle/test_func.rb b/test/fiddle/test_func.rb
index 529aaa8baf..5cdf90f567 100644
--- a/test/fiddle/test_func.rb
+++ b/test/fiddle/test_func.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require_relative 'helper'
rescue LoadError
diff --git a/test/fiddle/test_function.rb b/test/fiddle/test_function.rb
index 9351f961df..06d0eb2b50 100644
--- a/test/fiddle/test_function.rb
+++ b/test/fiddle/test_function.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require_relative 'helper'
rescue LoadError
diff --git a/test/fiddle/test_handle.rb b/test/fiddle/test_handle.rb
index 54165f00af..f14357c6cb 100644
--- a/test/fiddle/test_handle.rb
+++ b/test/fiddle/test_handle.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require_relative 'helper'
rescue LoadError
diff --git a/test/fiddle/test_import.rb b/test/fiddle/test_import.rb
index c83f50fe44..ba68296fd0 100644
--- a/test/fiddle/test_import.rb
+++ b/test/fiddle/test_import.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
begin
require_relative 'helper'
require 'fiddle/import'
diff --git a/test/fiddle/test_pointer.rb b/test/fiddle/test_pointer.rb
index ef54470943..ec677324eb 100644
--- a/test/fiddle/test_pointer.rb
+++ b/test/fiddle/test_pointer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require_relative 'helper'
rescue LoadError
diff --git a/test/fileutils/clobber.rb b/test/fileutils/clobber.rb
index 9f946651bf..ae416e9fa5 100644
--- a/test/fileutils/clobber.rb
+++ b/test/fileutils/clobber.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'fileutils'
require 'test/unit'
require 'tmpdir'
diff --git a/test/fileutils/fileasserts.rb b/test/fileutils/fileasserts.rb
index b6067f6d84..512d31e95f 100644
--- a/test/fileutils/fileasserts.rb
+++ b/test/fileutils/fileasserts.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
# $Id$
module Test
diff --git a/test/fileutils/test_dryrun.rb b/test/fileutils/test_dryrun.rb
index 03f6bed387..bc59f8d339 100644
--- a/test/fileutils/test_dryrun.rb
+++ b/test/fileutils/test_dryrun.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
# $Id$
require 'fileutils'
diff --git a/test/fileutils/test_fileutils.rb b/test/fileutils/test_fileutils.rb
index 1a6f1c5c55..f5ca9d21e2 100644
--- a/test/fileutils/test_fileutils.rb
+++ b/test/fileutils/test_fileutils.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
# $Id$
require 'fileutils'
diff --git a/test/fileutils/test_nowrite.rb b/test/fileutils/test_nowrite.rb
index 946eed3b6c..f331d51e46 100644
--- a/test/fileutils/test_nowrite.rb
+++ b/test/fileutils/test_nowrite.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
# $Id$
require 'fileutils'
diff --git a/test/fileutils/test_verbose.rb b/test/fileutils/test_verbose.rb
index fb069bcf14..1daf9f0531 100644
--- a/test/fileutils/test_verbose.rb
+++ b/test/fileutils/test_verbose.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
# $Id$
require 'test/unit'
diff --git a/test/fileutils/visibility_tests.rb b/test/fileutils/visibility_tests.rb
index a140614674..6bb5a9fc8f 100644
--- a/test/fileutils/visibility_tests.rb
+++ b/test/fileutils/visibility_tests.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'fileutils'
diff --git a/test/gdbm/test_gdbm.rb b/test/gdbm/test_gdbm.rb
index 729424dec5..0a42da386c 100644
--- a/test/gdbm/test_gdbm.rb
+++ b/test/gdbm/test_gdbm.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require 'gdbm'
rescue LoadError
diff --git a/test/io/console/test_io_console.rb b/test/io/console/test_io_console.rb
index ba9063e1b3..36619cebd5 100644
--- a/test/io/console/test_io_console.rb
+++ b/test/io/console/test_io_console.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require 'io/console'
require 'test/unit'
diff --git a/test/io/nonblock/test_flush.rb b/test/io/nonblock/test_flush.rb
index 70e65cceed..bc60cab8bf 100644
--- a/test/io/nonblock/test_flush.rb
+++ b/test/io/nonblock/test_flush.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'timeout'
begin
diff --git a/test/io/wait/test_io_wait.rb b/test/io/wait/test_io_wait.rb
index bef4731ae5..637917d510 100644
--- a/test/io/wait/test_io_wait.rb
+++ b/test/io/wait/test_io_wait.rb
@@ -1,4 +1,5 @@
# -*- coding: us-ascii -*-
+# frozen_string_literal: false
require 'test/unit'
require 'timeout'
require 'socket'
diff --git a/test/irb/test_completion.rb b/test/irb/test_completion.rb
index eeeda1234c..608c41bad9 100644
--- a/test/irb/test_completion.rb
+++ b/test/irb/test_completion.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
module TestIRB
diff --git a/test/irb/test_option.rb b/test/irb/test_option.rb
index a7dd663112..85ebd085ca 100644
--- a/test/irb/test_option.rb
+++ b/test/irb/test_option.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
module TestIRB
diff --git a/test/irb/test_raise_no_backtrace_exception.rb b/test/irb/test_raise_no_backtrace_exception.rb
index 67fb5b66cc..d3882a427c 100644
--- a/test/irb/test_raise_no_backtrace_exception.rb
+++ b/test/irb/test_raise_no_backtrace_exception.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
module TestIRB
diff --git a/test/json/setup_variant.rb b/test/json/setup_variant.rb
index 2dab184bc4..f7fb2a1d56 100644
--- a/test/json/setup_variant.rb
+++ b/test/json/setup_variant.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
case ENV['JSON']
when 'pure'
$:.unshift 'lib'
diff --git a/test/json/test_json.rb b/test/json/test_json.rb
index 07287eed81..8fe9459978 100755
--- a/test/json/test_json.rb
+++ b/test/json/test_json.rb
@@ -1,5 +1,6 @@
#!/usr/bin/env ruby
# encoding: utf-8
+# frozen_string_literal: false
require 'test/unit'
require File.join(File.dirname(__FILE__), 'setup_variant')
diff --git a/test/json/test_json_addition.rb b/test/json/test_json_addition.rb
index 6034a183bd..f2059312de 100644
--- a/test/json/test_json_addition.rb
+++ b/test/json/test_json_addition.rb
@@ -1,5 +1,6 @@
#!/usr/bin/env ruby
# -*- coding:utf-8 -*-
+# frozen_string_literal: false
require 'test/unit'
require File.join(File.dirname(__FILE__), 'setup_variant')
diff --git a/test/json/test_json_encoding.rb b/test/json/test_json_encoding.rb
index 13903cd266..50fb4ea279 100644
--- a/test/json/test_json_encoding.rb
+++ b/test/json/test_json_encoding.rb
@@ -1,5 +1,6 @@
#!/usr/bin/env ruby
# encoding: utf-8
+# frozen_string_literal: false
require 'test/unit'
require File.join(File.dirname(__FILE__), 'setup_variant')
diff --git a/test/json/test_json_fixtures.rb b/test/json/test_json_fixtures.rb
index c861439573..e192706d6b 100644
--- a/test/json/test_json_fixtures.rb
+++ b/test/json/test_json_fixtures.rb
@@ -1,5 +1,6 @@
#!/usr/bin/env ruby
# encoding: utf-8
+# frozen_string_literal: false
require 'test/unit'
require File.join(File.dirname(__FILE__), 'setup_variant')
diff --git a/test/json/test_json_generate.rb b/test/json/test_json_generate.rb
index 5da0d2f4f0..50895f6247 100644
--- a/test/json/test_json_generate.rb
+++ b/test/json/test_json_generate.rb
@@ -1,5 +1,6 @@
#!/usr/bin/env ruby
# encoding: utf-8
+# frozen_string_literal: false
require 'test/unit'
require File.join(File.dirname(__FILE__), 'setup_variant')
diff --git a/test/json/test_json_generic_object.rb b/test/json/test_json_generic_object.rb
index c43c7762be..e04e1a1cb3 100644
--- a/test/json/test_json_generic_object.rb
+++ b/test/json/test_json_generic_object.rb
@@ -1,5 +1,6 @@
#!/usr/bin/env ruby
# encoding: utf-8
+# frozen_string_literal: false
require 'test/unit'
require File.join(File.dirname(__FILE__), 'setup_variant')
diff --git a/test/json/test_json_string_matching.rb b/test/json/test_json_string_matching.rb
index c233df8c2c..6158231103 100644
--- a/test/json/test_json_string_matching.rb
+++ b/test/json/test_json_string_matching.rb
@@ -1,5 +1,6 @@
#!/usr/bin/env ruby
# encoding: utf-8
+# frozen_string_literal: false
require 'test/unit'
require File.join(File.dirname(__FILE__), 'setup_variant')
diff --git a/test/json/test_json_unicode.rb b/test/json/test_json_unicode.rb
index 8352d5c6c6..16234f0491 100644
--- a/test/json/test_json_unicode.rb
+++ b/test/json/test_json_unicode.rb
@@ -1,5 +1,6 @@
#!/usr/bin/env ruby
# encoding: utf-8
+# frozen_string_literal: false
require 'test/unit'
require File.join(File.dirname(__FILE__), 'setup_variant')
diff --git a/test/lib/envutil.rb b/test/lib/envutil.rb
index 2f2ec6deb6..a0b907c245 100644
--- a/test/lib/envutil.rb
+++ b/test/lib/envutil.rb
@@ -1,4 +1,5 @@
# -*- coding: us-ascii -*-
+# frozen_string_literal: false
require "open3"
require "timeout"
require_relative "find_executable"
diff --git a/test/lib/find_executable.rb b/test/lib/find_executable.rb
index 4ba9a0533e..0ddd307f8c 100644
--- a/test/lib/find_executable.rb
+++ b/test/lib/find_executable.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "rbconfig"
module EnvUtil
diff --git a/test/lib/iseq_loader_checker.rb b/test/lib/iseq_loader_checker.rb
index db9b7678c9..675b6580d6 100644
--- a/test/lib/iseq_loader_checker.rb
+++ b/test/lib/iseq_loader_checker.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require '-test-/iseq_load/iseq_load'
diff --git a/test/lib/leakchecker.rb b/test/lib/leakchecker.rb
index 98a598f365..a9bc5813c5 100644
--- a/test/lib/leakchecker.rb
+++ b/test/lib/leakchecker.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
class LeakChecker
def initialize
@fd_info = find_fds
diff --git a/test/lib/memory_status.rb b/test/lib/memory_status.rb
index b275db05e6..deaaeb2a1b 100644
--- a/test/lib/memory_status.rb
+++ b/test/lib/memory_status.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
module Memory
keys = []
vals = []
diff --git a/test/lib/minitest/autorun.rb b/test/lib/minitest/autorun.rb
index 88b1e0550d..40640b2580 100644
--- a/test/lib/minitest/autorun.rb
+++ b/test/lib/minitest/autorun.rb
@@ -1,4 +1,5 @@
# encoding: utf-8
+# frozen_string_literal: false
begin
require 'rubygems'
diff --git a/test/lib/minitest/benchmark.rb b/test/lib/minitest/benchmark.rb
index 5195fc01bc..21f0b29d50 100644
--- a/test/lib/minitest/benchmark.rb
+++ b/test/lib/minitest/benchmark.rb
@@ -1,4 +1,5 @@
# encoding: utf-8
+# frozen_string_literal: false
require 'minitest/unit'
diff --git a/test/lib/minitest/mock.rb b/test/lib/minitest/mock.rb
index 19acaff68e..07e88113ea 100644
--- a/test/lib/minitest/mock.rb
+++ b/test/lib/minitest/mock.rb
@@ -1,4 +1,5 @@
# encoding: utf-8
+# frozen_string_literal: false
class MockExpectationError < StandardError; end # :nodoc:
diff --git a/test/lib/minitest/unit.rb b/test/lib/minitest/unit.rb
index e67ca02cd8..62f89e97e5 100644
--- a/test/lib/minitest/unit.rb
+++ b/test/lib/minitest/unit.rb
@@ -1,4 +1,5 @@
# encoding: utf-8
+# frozen_string_literal: false
require "optparse"
require "rbconfig"
diff --git a/test/lib/profile_test_all.rb b/test/lib/profile_test_all.rb
index 08de7bb129..4496d3f780 100644
--- a/test/lib/profile_test_all.rb
+++ b/test/lib/profile_test_all.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
#
# purpose:
# Profile memory usage of each tests.
diff --git a/test/lib/test/unit.rb b/test/lib/test/unit.rb
index d886f29c73..85e6d76f3d 100644
--- a/test/lib/test/unit.rb
+++ b/test/lib/test/unit.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
gem 'minitest', '< 5.0.0' if defined? Gem
rescue Gem::LoadError
diff --git a/test/lib/test/unit/assertions.rb b/test/lib/test/unit/assertions.rb
index 201e24592a..c749384eba 100644
--- a/test/lib/test/unit/assertions.rb
+++ b/test/lib/test/unit/assertions.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'minitest/unit'
require 'pp'
diff --git a/test/lib/test/unit/parallel.rb b/test/lib/test/unit/parallel.rb
index 780deda5ae..6a319c3c3f 100644
--- a/test/lib/test/unit/parallel.rb
+++ b/test/lib/test/unit/parallel.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
$LOAD_PATH.unshift "#{File.dirname(__FILE__)}/../.."
require 'test/unit'
diff --git a/test/lib/test/unit/testcase.rb b/test/lib/test/unit/testcase.rb
index d6ea4fd2b1..10348b5c9b 100644
--- a/test/lib/test/unit/testcase.rb
+++ b/test/lib/test/unit/testcase.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit/assertions'
module Test
diff --git a/test/lib/tracepointchecker.rb b/test/lib/tracepointchecker.rb
index 2d56e658ff..73631d415e 100644
--- a/test/lib/tracepointchecker.rb
+++ b/test/lib/tracepointchecker.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
module TracePointChecker
STATE = {
count: 0,
diff --git a/test/lib/with_different_ofs.rb b/test/lib/with_different_ofs.rb
index 76dfa6896c..164914f1d6 100644
--- a/test/lib/with_different_ofs.rb
+++ b/test/lib/with_different_ofs.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
module DifferentOFS
module WithDifferentOFS
def setup
diff --git a/test/lib/zombie_hunter.rb b/test/lib/zombie_hunter.rb
index 77be4dfea8..8a8fba649c 100644
--- a/test/lib/zombie_hunter.rb
+++ b/test/lib/zombie_hunter.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
module ZombieHunter
def after_teardown
super
diff --git a/test/logger/test_logdevice.rb b/test/logger/test_logdevice.rb
index f6dcf9a5a3..8a7938984f 100644
--- a/test/logger/test_logdevice.rb
+++ b/test/logger/test_logdevice.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require 'test/unit'
require 'logger'
require 'tempfile'
diff --git a/test/logger/test_logger.rb b/test/logger/test_logger.rb
index 24a53c1f64..836d3b30f4 100644
--- a/test/logger/test_logger.rb
+++ b/test/logger/test_logger.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require 'test/unit'
require 'logger'
require 'tempfile'
diff --git a/test/logger/test_severity.rb b/test/logger/test_severity.rb
index 045461caa2..f17a392829 100644
--- a/test/logger/test_severity.rb
+++ b/test/logger/test_severity.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require 'test/unit'
require 'logger'
diff --git a/test/matrix/test_matrix.rb b/test/matrix/test_matrix.rb
index 4e4dda0ee1..425ec25a52 100644
--- a/test/matrix/test_matrix.rb
+++ b/test/matrix/test_matrix.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'matrix'
diff --git a/test/matrix/test_vector.rb b/test/matrix/test_vector.rb
index 77fc68dd2b..72082be84c 100644
--- a/test/matrix/test_vector.rb
+++ b/test/matrix/test_vector.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'matrix'
diff --git a/test/minitest/metametameta.rb b/test/minitest/metametameta.rb
index 9ffbdb0569..a12717c8b1 100644
--- a/test/minitest/metametameta.rb
+++ b/test/minitest/metametameta.rb
@@ -1,4 +1,5 @@
# encoding: utf-8
+# frozen_string_literal: false
require 'tempfile'
require 'stringio'
diff --git a/test/minitest/test_minitest_benchmark.rb b/test/minitest/test_minitest_benchmark.rb
index d04bb9a125..a783e684c2 100644
--- a/test/minitest/test_minitest_benchmark.rb
+++ b/test/minitest/test_minitest_benchmark.rb
@@ -1,4 +1,5 @@
# encoding: utf-8
+# frozen_string_literal: false
require 'minitest/autorun'
require 'minitest/benchmark'
diff --git a/test/minitest/test_minitest_mock.rb b/test/minitest/test_minitest_mock.rb
index 062cda56ff..0db972674c 100644
--- a/test/minitest/test_minitest_mock.rb
+++ b/test/minitest/test_minitest_mock.rb
@@ -1,4 +1,5 @@
# encoding: utf-8
+# frozen_string_literal: false
require 'minitest/autorun'
diff --git a/test/minitest/test_minitest_unit.rb b/test/minitest/test_minitest_unit.rb
index 61bfe25ee3..315c36d416 100644
--- a/test/minitest/test_minitest_unit.rb
+++ b/test/minitest/test_minitest_unit.rb
@@ -1,4 +1,5 @@
# encoding: utf-8
+# frozen_string_literal: false
require 'pathname'
require 'minitest/metametameta'
diff --git a/test/misc/test_ruby_mode.rb b/test/misc/test_ruby_mode.rb
index 5be01747f1..a91e1c254c 100644
--- a/test/misc/test_ruby_mode.rb
+++ b/test/misc/test_ruby_mode.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'tempfile'
diff --git a/test/mkmf/base.rb b/test/mkmf/base.rb
index d8e2a04fe7..86bdd29286 100644
--- a/test/mkmf/base.rb
+++ b/test/mkmf/base.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
$extmk = true
require 'test/unit'
diff --git a/test/mkmf/test_config.rb b/test/mkmf/test_config.rb
index 7bf537e693..07ed641415 100644
--- a/test/mkmf/test_config.rb
+++ b/test/mkmf/test_config.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
$extmk = true
require 'test/unit'
diff --git a/test/mkmf/test_constant.rb b/test/mkmf/test_constant.rb
index fd1f940c44..f5a87a1caa 100644
--- a/test/mkmf/test_constant.rb
+++ b/test/mkmf/test_constant.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'base'
class TestMkmf
diff --git a/test/mkmf/test_convertible.rb b/test/mkmf/test_convertible.rb
index eec2d12c66..1baf892842 100644
--- a/test/mkmf/test_convertible.rb
+++ b/test/mkmf/test_convertible.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'base'
class TestMkmf
diff --git a/test/mkmf/test_find_executable.rb b/test/mkmf/test_find_executable.rb
index fe45ef2d1c..d2b460bd00 100644
--- a/test/mkmf/test_find_executable.rb
+++ b/test/mkmf/test_find_executable.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'base'
class TestMkmf
diff --git a/test/mkmf/test_flags.rb b/test/mkmf/test_flags.rb
index e49d474dc9..69a1084608 100644
--- a/test/mkmf/test_flags.rb
+++ b/test/mkmf/test_flags.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'base'
class TestMkmf
diff --git a/test/mkmf/test_framework.rb b/test/mkmf/test_framework.rb
index 70ea8c3327..ae05b0cffc 100644
--- a/test/mkmf/test_framework.rb
+++ b/test/mkmf/test_framework.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'base'
class TestMkmf
diff --git a/test/mkmf/test_have_func.rb b/test/mkmf/test_have_func.rb
index 8049ffba18..5f76b72122 100644
--- a/test/mkmf/test_have_func.rb
+++ b/test/mkmf/test_have_func.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'base'
require 'tempfile'
diff --git a/test/mkmf/test_have_library.rb b/test/mkmf/test_have_library.rb
index bf17b85f61..bb9ce6972d 100644
--- a/test/mkmf/test_have_library.rb
+++ b/test/mkmf/test_have_library.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'base'
require 'tempfile'
diff --git a/test/mkmf/test_have_macro.rb b/test/mkmf/test_have_macro.rb
index 43c4029f70..ebc5648097 100644
--- a/test/mkmf/test_have_macro.rb
+++ b/test/mkmf/test_have_macro.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'base'
require 'tempfile'
diff --git a/test/mkmf/test_libs.rb b/test/mkmf/test_libs.rb
index 27674dfd26..bb65e4de90 100644
--- a/test/mkmf/test_libs.rb
+++ b/test/mkmf/test_libs.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'base'
class TestMkmf
diff --git a/test/mkmf/test_signedness.rb b/test/mkmf/test_signedness.rb
index 8d58073698..589dcb56e8 100644
--- a/test/mkmf/test_signedness.rb
+++ b/test/mkmf/test_signedness.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'base'
class TestMkmf
diff --git a/test/mkmf/test_sizeof.rb b/test/mkmf/test_sizeof.rb
index c0144226d5..742c3d6454 100644
--- a/test/mkmf/test_sizeof.rb
+++ b/test/mkmf/test_sizeof.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'base'
class TestMkmf
diff --git a/test/monitor/test_monitor.rb b/test/monitor/test_monitor.rb
index 088bf28a37..66c3e833ca 100644
--- a/test/monitor/test_monitor.rb
+++ b/test/monitor/test_monitor.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "monitor"
require "thread"
diff --git a/test/net/http/test_buffered_io.rb b/test/net/http/test_buffered_io.rb
index e24e7c1ed9..8c299ead03 100644
--- a/test/net/http/test_buffered_io.rb
+++ b/test/net/http/test_buffered_io.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'net/http'
require 'stringio'
diff --git a/test/net/http/test_http.rb b/test/net/http/test_http.rb
index 714e576cc1..d8983e91cd 100644
--- a/test/net/http/test_http.rb
+++ b/test/net/http/test_http.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require 'test/unit'
require 'net/http'
require 'stringio'
diff --git a/test/net/http/test_http_request.rb b/test/net/http/test_http_request.rb
index 1dcb847c3f..35c935ac58 100644
--- a/test/net/http/test_http_request.rb
+++ b/test/net/http/test_http_request.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'net/http'
require 'test/unit'
require 'stringio'
diff --git a/test/net/http/test_httpheader.rb b/test/net/http/test_httpheader.rb
index 224d8bb9a9..2f3a0f1157 100644
--- a/test/net/http/test_httpheader.rb
+++ b/test/net/http/test_httpheader.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'net/http'
require 'test/unit'
diff --git a/test/net/http/test_httpresponse.rb b/test/net/http/test_httpresponse.rb
index a86020581c..eb1a792e87 100644
--- a/test/net/http/test_httpresponse.rb
+++ b/test/net/http/test_httpresponse.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require 'net/http'
require 'test/unit'
require 'stringio'
diff --git a/test/net/http/test_httpresponses.rb b/test/net/http/test_httpresponses.rb
index bf7fbeef11..b389e163cf 100644
--- a/test/net/http/test_httpresponses.rb
+++ b/test/net/http/test_httpresponses.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'net/http'
require 'test/unit'
diff --git a/test/net/http/test_https.rb b/test/net/http/test_https.rb
index 8177d9451f..dfdb221d7e 100644
--- a/test/net/http/test_https.rb
+++ b/test/net/http/test_https.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
begin
require 'net/https'
diff --git a/test/net/http/test_https_proxy.rb b/test/net/http/test_https_proxy.rb
index 1c8503b7e1..f833f1a1e3 100644
--- a/test/net/http/test_https_proxy.rb
+++ b/test/net/http/test_https_proxy.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require 'net/https'
rescue LoadError
diff --git a/test/net/http/utils.rb b/test/net/http/utils.rb
index dcd94693c2..8d0ecd6020 100644
--- a/test/net/http/utils.rb
+++ b/test/net/http/utils.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'webrick'
begin
require "webrick/https"
diff --git a/test/net/pop/test_pop.rb b/test/net/pop/test_pop.rb
index 7aa65a4432..f06ccb4452 100644
--- a/test/net/pop/test_pop.rb
+++ b/test/net/pop/test_pop.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'net/pop'
require 'test/unit'
require 'digest/md5'
diff --git a/test/net/protocol/test_protocol.rb b/test/net/protocol/test_protocol.rb
index 4453422552..0161fbc3a0 100644
--- a/test/net/protocol/test_protocol.rb
+++ b/test/net/protocol/test_protocol.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "net/protocol"
require "stringio"
diff --git a/test/net/smtp/test_response.rb b/test/net/smtp/test_response.rb
index cfd90b18ec..79ac1d2d32 100644
--- a/test/net/smtp/test_response.rb
+++ b/test/net/smtp/test_response.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'net/smtp'
require 'test/unit'
diff --git a/test/net/smtp/test_smtp.rb b/test/net/smtp/test_smtp.rb
index d8bb0c192c..0edb3419d5 100644
--- a/test/net/smtp/test_smtp.rb
+++ b/test/net/smtp/test_smtp.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'net/smtp'
require 'stringio'
require 'test/unit'
diff --git a/test/net/smtp/test_ssl_socket.rb b/test/net/smtp/test_ssl_socket.rb
index ff229b5ad0..20792190c8 100644
--- a/test/net/smtp/test_ssl_socket.rb
+++ b/test/net/smtp/test_ssl_socket.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'net/smtp'
require 'test/unit'
diff --git a/test/nkf/test_kconv.rb b/test/nkf/test_kconv.rb
index 09c0ce803a..de09bcd4ae 100644
--- a/test/nkf/test_kconv.rb
+++ b/test/nkf/test_kconv.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'kconv'
diff --git a/test/nkf/test_nkf.rb b/test/nkf/test_nkf.rb
index 7329e75f12..eb51bf8e7d 100644
--- a/test/nkf/test_nkf.rb
+++ b/test/nkf/test_nkf.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'nkf'
diff --git a/test/objspace/test_objspace.rb b/test/objspace/test_objspace.rb
index de71994419..f3ea88f6e4 100644
--- a/test/objspace/test_objspace.rb
+++ b/test/objspace/test_objspace.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "objspace"
diff --git a/test/openssl/test_asn1.rb b/test/openssl/test_asn1.rb
index 8955d72716..fd2118d808 100644
--- a/test/openssl/test_asn1.rb
+++ b/test/openssl/test_asn1.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'utils'
class OpenSSL::TestASN1 < Test::Unit::TestCase
diff --git a/test/openssl/test_bn.rb b/test/openssl/test_bn.rb
index 667cb2964e..848d1feb43 100644
--- a/test/openssl/test_bn.rb
+++ b/test/openssl/test_bn.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'utils'
if defined?(OpenSSL::TestUtils)
diff --git a/test/openssl/test_buffering.rb b/test/openssl/test_buffering.rb
index 0ca645998e..fe07b46a5e 100644
--- a/test/openssl/test_buffering.rb
+++ b/test/openssl/test_buffering.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'utils'
require 'stringio'
diff --git a/test/openssl/test_cipher.rb b/test/openssl/test_cipher.rb
index 6f92c381cf..89c176f4de 100644
--- a/test/openssl/test_cipher.rb
+++ b/test/openssl/test_cipher.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'utils'
if defined?(OpenSSL::TestUtils)
diff --git a/test/openssl/test_config.rb b/test/openssl/test_config.rb
index 62f9fabce2..8f5bdb2150 100644
--- a/test/openssl/test_config.rb
+++ b/test/openssl/test_config.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'utils'
class OpenSSL::TestConfig < Test::Unit::TestCase
diff --git a/test/openssl/test_digest.rb b/test/openssl/test_digest.rb
index 5390225f36..e206ca0283 100644
--- a/test/openssl/test_digest.rb
+++ b/test/openssl/test_digest.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'utils'
if defined?(OpenSSL::TestUtils)
diff --git a/test/openssl/test_engine.rb b/test/openssl/test_engine.rb
index a7264d0eeb..3521de6396 100644
--- a/test/openssl/test_engine.rb
+++ b/test/openssl/test_engine.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'utils'
class OpenSSL::TestEngine < Test::Unit::TestCase
diff --git a/test/openssl/test_fips.rb b/test/openssl/test_fips.rb
index 6e4ac6d345..33769c9388 100644
--- a/test/openssl/test_fips.rb
+++ b/test/openssl/test_fips.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'utils'
if defined?(OpenSSL::TestUtils)
diff --git a/test/openssl/test_hmac.rb b/test/openssl/test_hmac.rb
index f709ebd69b..135d26f02c 100644
--- a/test/openssl/test_hmac.rb
+++ b/test/openssl/test_hmac.rb
@@ -1,4 +1,5 @@
# coding: UTF-8
+# frozen_string_literal: false
require_relative 'utils'
diff --git a/test/openssl/test_ns_spki.rb b/test/openssl/test_ns_spki.rb
index ab07bfbebb..4f6e6f59e7 100644
--- a/test/openssl/test_ns_spki.rb
+++ b/test/openssl/test_ns_spki.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'utils'
if defined?(OpenSSL::TestUtils)
diff --git a/test/openssl/test_ocsp.rb b/test/openssl/test_ocsp.rb
index af727d8ecd..1a969fd767 100644
--- a/test/openssl/test_ocsp.rb
+++ b/test/openssl/test_ocsp.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "utils"
if defined?(OpenSSL::TestUtils)
diff --git a/test/openssl/test_pair.rb b/test/openssl/test_pair.rb
index 33ec555492..06ed3836ca 100644
--- a/test/openssl/test_pair.rb
+++ b/test/openssl/test_pair.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'utils'
if defined?(OpenSSL::TestUtils)
diff --git a/test/openssl/test_partial_record_read.rb b/test/openssl/test_partial_record_read.rb
index 1899a300df..71e644a039 100644
--- a/test/openssl/test_partial_record_read.rb
+++ b/test/openssl/test_partial_record_read.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "utils"
if defined?(OpenSSL::TestUtils)
diff --git a/test/openssl/test_pkcs12.rb b/test/openssl/test_pkcs12.rb
index c44cee00ed..ba07d76789 100644
--- a/test/openssl/test_pkcs12.rb
+++ b/test/openssl/test_pkcs12.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "utils"
if defined?(OpenSSL::TestUtils)
diff --git a/test/openssl/test_pkcs5.rb b/test/openssl/test_pkcs5.rb
index 5e85dde955..f38fd716b7 100644
--- a/test/openssl/test_pkcs5.rb
+++ b/test/openssl/test_pkcs5.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'utils'
class OpenSSL::TestPKCS5 < Test::Unit::TestCase
diff --git a/test/openssl/test_pkcs7.rb b/test/openssl/test_pkcs7.rb
index 47bd4f3133..ce99db50b1 100644
--- a/test/openssl/test_pkcs7.rb
+++ b/test/openssl/test_pkcs7.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'utils'
if defined?(OpenSSL::TestUtils)
diff --git a/test/openssl/test_pkey_dh.rb b/test/openssl/test_pkey_dh.rb
index 040d030914..9ef4025bee 100644
--- a/test/openssl/test_pkey_dh.rb
+++ b/test/openssl/test_pkey_dh.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'utils'
if defined?(OpenSSL::TestUtils)
diff --git a/test/openssl/test_pkey_dsa.rb b/test/openssl/test_pkey_dsa.rb
index e4ea1b5bd7..eb3e4f1c65 100644
--- a/test/openssl/test_pkey_dsa.rb
+++ b/test/openssl/test_pkey_dsa.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'utils'
require 'base64'
diff --git a/test/openssl/test_pkey_ec.rb b/test/openssl/test_pkey_ec.rb
index 1693ace01f..fe128fd455 100644
--- a/test/openssl/test_pkey_ec.rb
+++ b/test/openssl/test_pkey_ec.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'utils'
if defined?(OpenSSL::TestUtils) && defined?(OpenSSL::PKey::EC)
diff --git a/test/openssl/test_pkey_rsa.rb b/test/openssl/test_pkey_rsa.rb
index ea042c2785..165b1ec98e 100644
--- a/test/openssl/test_pkey_rsa.rb
+++ b/test/openssl/test_pkey_rsa.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'utils'
require 'base64'
diff --git a/test/openssl/test_random.rb b/test/openssl/test_random.rb
index e4242acf18..8c69d5431c 100644
--- a/test/openssl/test_random.rb
+++ b/test/openssl/test_random.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require "openssl"
rescue LoadError
diff --git a/test/openssl/test_ssl.rb b/test/openssl/test_ssl.rb
index 5682bf5081..58fcc0802a 100644
--- a/test/openssl/test_ssl.rb
+++ b/test/openssl/test_ssl.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "utils"
if defined?(OpenSSL::TestUtils)
diff --git a/test/openssl/test_ssl_session.rb b/test/openssl/test_ssl_session.rb
index 28d268e76b..3294aa7f80 100644
--- a/test/openssl/test_ssl_session.rb
+++ b/test/openssl/test_ssl_session.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "utils"
if defined?(OpenSSL::TestUtils)
diff --git a/test/openssl/test_x509cert.rb b/test/openssl/test_x509cert.rb
index 783677a432..72cb9e6095 100644
--- a/test/openssl/test_x509cert.rb
+++ b/test/openssl/test_x509cert.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "utils"
if defined?(OpenSSL::TestUtils)
diff --git a/test/openssl/test_x509crl.rb b/test/openssl/test_x509crl.rb
index 9dc1b1cd14..7994ddeaf9 100644
--- a/test/openssl/test_x509crl.rb
+++ b/test/openssl/test_x509crl.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "utils"
if defined?(OpenSSL::TestUtils)
diff --git a/test/openssl/test_x509ext.rb b/test/openssl/test_x509ext.rb
index 29e9f1dc44..e6d49bb679 100644
--- a/test/openssl/test_x509ext.rb
+++ b/test/openssl/test_x509ext.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'utils'
if defined?(OpenSSL::TestUtils)
diff --git a/test/openssl/test_x509name.rb b/test/openssl/test_x509name.rb
index a92af53492..56e79879cf 100644
--- a/test/openssl/test_x509name.rb
+++ b/test/openssl/test_x509name.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require_relative 'utils'
if defined?(OpenSSL::TestUtils)
diff --git a/test/openssl/test_x509req.rb b/test/openssl/test_x509req.rb
index 27040cb7bf..f1bf18465f 100644
--- a/test/openssl/test_x509req.rb
+++ b/test/openssl/test_x509req.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "utils"
if defined?(OpenSSL::TestUtils)
diff --git a/test/openssl/test_x509store.rb b/test/openssl/test_x509store.rb
index f3e144fc51..9964cc8fc4 100644
--- a/test/openssl/test_x509store.rb
+++ b/test/openssl/test_x509store.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "utils"
if defined?(OpenSSL::TestUtils)
diff --git a/test/openssl/utils.rb b/test/openssl/utils.rb
index bd936beed7..0802c1ba99 100644
--- a/test/openssl/utils.rb
+++ b/test/openssl/utils.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require "openssl"
diff --git a/test/optparse/test_acceptable.rb b/test/optparse/test_acceptable.rb
index ee8479cc1e..0c7590bae3 100644
--- a/test/optparse/test_acceptable.rb
+++ b/test/optparse/test_acceptable.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'test_optparse'
class TestOptionParser::Acceptable < TestOptionParser
diff --git a/test/optparse/test_autoconf.rb b/test/optparse/test_autoconf.rb
index cb9c938609..4b3616f816 100644
--- a/test/optparse/test_autoconf.rb
+++ b/test/optparse/test_autoconf.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'optparse/ac'
diff --git a/test/optparse/test_bash_completion.rb b/test/optparse/test_bash_completion.rb
index baeb6d9882..714fd35cff 100644
--- a/test/optparse/test_bash_completion.rb
+++ b/test/optparse/test_bash_completion.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'optparse'
diff --git a/test/optparse/test_getopts.rb b/test/optparse/test_getopts.rb
index ae22f68184..3711e6f269 100644
--- a/test/optparse/test_getopts.rb
+++ b/test/optparse/test_getopts.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'optparse'
diff --git a/test/optparse/test_noarg.rb b/test/optparse/test_noarg.rb
index 3e6ed42f91..8f9be29ab8 100644
--- a/test/optparse/test_noarg.rb
+++ b/test/optparse/test_noarg.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'test_optparse'
module TestOptionParser::NoArg
diff --git a/test/optparse/test_optarg.rb b/test/optparse/test_optarg.rb
index 3114b80fc5..b7436fb74c 100644
--- a/test/optparse/test_optarg.rb
+++ b/test/optparse/test_optarg.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'test_optparse'
class TestOptionParser::OptArg < TestOptionParser
diff --git a/test/optparse/test_optparse.rb b/test/optparse/test_optparse.rb
index e85a2ef586..f17f8ee895 100644
--- a/test/optparse/test_optparse.rb
+++ b/test/optparse/test_optparse.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'optparse'
diff --git a/test/optparse/test_placearg.rb b/test/optparse/test_placearg.rb
index 0bbd1a007e..90b2b97a63 100644
--- a/test/optparse/test_placearg.rb
+++ b/test/optparse/test_placearg.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'test_optparse'
class TestOptionParser::PlaceArg < TestOptionParser
diff --git a/test/optparse/test_reqarg.rb b/test/optparse/test_reqarg.rb
index 397da4a593..1904f46154 100644
--- a/test/optparse/test_reqarg.rb
+++ b/test/optparse/test_reqarg.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'test_optparse'
module TestOptionParser::ReqArg
diff --git a/test/optparse/test_summary.rb b/test/optparse/test_summary.rb
index 54fd194bbd..b743aa00c1 100644
--- a/test/optparse/test_summary.rb
+++ b/test/optparse/test_summary.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'test_optparse'
class TestOptionParser::SummaryTest < TestOptionParser
diff --git a/test/optparse/test_zsh_completion.rb b/test/optparse/test_zsh_completion.rb
index 7e5ba71384..1bc6c7f0bb 100644
--- a/test/optparse/test_zsh_completion.rb
+++ b/test/optparse/test_zsh_completion.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'optparse'
diff --git a/test/ostruct/test_ostruct.rb b/test/ostruct/test_ostruct.rb
index b098992bc9..8c122b94a7 100644
--- a/test/ostruct/test_ostruct.rb
+++ b/test/ostruct/test_ostruct.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'ostruct'
diff --git a/test/psych/handlers/test_recorder.rb b/test/psych/handlers/test_recorder.rb
index 96b8eac1fc..17c7c6d0a0 100644
--- a/test/psych/handlers/test_recorder.rb
+++ b/test/psych/handlers/test_recorder.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'psych/helper'
require 'psych/handlers/recorder'
diff --git a/test/psych/helper.rb b/test/psych/helper.rb
index 3bbb459320..498cdf8b09 100644
--- a/test/psych/helper.rb
+++ b/test/psych/helper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'minitest/autorun'
require 'stringio'
require 'tempfile'
diff --git a/test/psych/json/test_stream.rb b/test/psych/json/test_stream.rb
index b0c33e6a2a..519c114b29 100644
--- a/test/psych/json/test_stream.rb
+++ b/test/psych/json/test_stream.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'psych/helper'
module Psych
diff --git a/test/psych/nodes/test_enumerable.rb b/test/psych/nodes/test_enumerable.rb
index 19cf94bd51..2f4e1f3bd0 100644
--- a/test/psych/nodes/test_enumerable.rb
+++ b/test/psych/nodes/test_enumerable.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'psych/helper'
module Psych
diff --git a/test/psych/test_alias_and_anchor.rb b/test/psych/test_alias_and_anchor.rb
index 9e2c24013d..ed009605ca 100644
--- a/test/psych/test_alias_and_anchor.rb
+++ b/test/psych/test_alias_and_anchor.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
class ObjectWithInstanceVariables
diff --git a/test/psych/test_array.rb b/test/psych/test_array.rb
index 960ffd71d8..f1e71fb16c 100644
--- a/test/psych/test_array.rb
+++ b/test/psych/test_array.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_boolean.rb b/test/psych/test_boolean.rb
index b656f4f90e..b2803a6550 100644
--- a/test/psych/test_boolean.rb
+++ b/test/psych/test_boolean.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_class.rb b/test/psych/test_class.rb
index c7f964cc6d..4e1fd4a1d6 100644
--- a/test/psych/test_class.rb
+++ b/test/psych/test_class.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_coder.rb b/test/psych/test_coder.rb
index e3213e2faa..e578d55f2d 100644
--- a/test/psych/test_coder.rb
+++ b/test/psych/test_coder.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_date_time.rb b/test/psych/test_date_time.rb
index 72150ad7db..433fbf3d26 100644
--- a/test/psych/test_date_time.rb
+++ b/test/psych/test_date_time.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
require 'date'
diff --git a/test/psych/test_deprecated.rb b/test/psych/test_deprecated.rb
index fd2d3299e3..a806f6b972 100644
--- a/test/psych/test_deprecated.rb
+++ b/test/psych/test_deprecated.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_document.rb b/test/psych/test_document.rb
index bd77d60084..97de2e15ec 100644
--- a/test/psych/test_document.rb
+++ b/test/psych/test_document.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_emitter.rb b/test/psych/test_emitter.rb
index b19501932b..54b9b356e8 100644
--- a/test/psych/test_emitter.rb
+++ b/test/psych/test_emitter.rb
@@ -1,4 +1,5 @@
# -*- coding: utf-8 -*-
+# frozen_string_literal: false
require_relative 'helper'
diff --git a/test/psych/test_encoding.rb b/test/psych/test_encoding.rb
index 544337d4c0..13ca5dbc74 100644
--- a/test/psych/test_encoding.rb
+++ b/test/psych/test_encoding.rb
@@ -1,4 +1,5 @@
# -*- coding: utf-8 -*-
+# frozen_string_literal: false
require_relative 'helper'
diff --git a/test/psych/test_exception.rb b/test/psych/test_exception.rb
index 30dfb24f3b..85fa78f5df 100644
--- a/test/psych/test_exception.rb
+++ b/test/psych/test_exception.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_hash.rb b/test/psych/test_hash.rb
index e2a312901a..b449ce49e3 100644
--- a/test/psych/test_hash.rb
+++ b/test/psych/test_hash.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_json_tree.rb b/test/psych/test_json_tree.rb
index a23fc1ac8f..8bb850b138 100644
--- a/test/psych/test_json_tree.rb
+++ b/test/psych/test_json_tree.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_marshalable.rb b/test/psych/test_marshalable.rb
index 7df74ee846..544947a521 100644
--- a/test/psych/test_marshalable.rb
+++ b/test/psych/test_marshalable.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
require 'delegate'
diff --git a/test/psych/test_merge_keys.rb b/test/psych/test_merge_keys.rb
index 1620a6a4e3..76245ca7b5 100644
--- a/test/psych/test_merge_keys.rb
+++ b/test/psych/test_merge_keys.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_nil.rb b/test/psych/test_nil.rb
index 3dbf56279a..3d4fa88eaa 100644
--- a/test/psych/test_nil.rb
+++ b/test/psych/test_nil.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_null.rb b/test/psych/test_null.rb
index 1725550443..d8ccb7056f 100644
--- a/test/psych/test_null.rb
+++ b/test/psych/test_null.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_numeric.rb b/test/psych/test_numeric.rb
index 5378b4aaad..9d8b74f7ca 100644
--- a/test/psych/test_numeric.rb
+++ b/test/psych/test_numeric.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
require 'bigdecimal'
diff --git a/test/psych/test_object.rb b/test/psych/test_object.rb
index 5e3ce8294f..ed1ccd9bf8 100644
--- a/test/psych/test_object.rb
+++ b/test/psych/test_object.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_object_references.rb b/test/psych/test_object_references.rb
index 273b466b0c..1300bfc1db 100644
--- a/test/psych/test_object_references.rb
+++ b/test/psych/test_object_references.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_omap.rb b/test/psych/test_omap.rb
index 36edc26c49..80791aa918 100644
--- a/test/psych/test_omap.rb
+++ b/test/psych/test_omap.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_parser.rb b/test/psych/test_parser.rb
index 0abe0dd398..26aba0543b 100644
--- a/test/psych/test_parser.rb
+++ b/test/psych/test_parser.rb
@@ -1,4 +1,5 @@
# coding: utf-8
+# frozen_string_literal: false
require_relative 'helper'
diff --git a/test/psych/test_psych.rb b/test/psych/test_psych.rb
index 05a93438bc..7de9e07fdc 100644
--- a/test/psych/test_psych.rb
+++ b/test/psych/test_psych.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
require 'stringio'
diff --git a/test/psych/test_safe_load.rb b/test/psych/test_safe_load.rb
index dd299c0ebf..b69c54c199 100644
--- a/test/psych/test_safe_load.rb
+++ b/test/psych/test_safe_load.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'psych/helper'
module Psych
diff --git a/test/psych/test_scalar.rb b/test/psych/test_scalar.rb
index e6b76975a6..4353ec33fa 100644
--- a/test/psych/test_scalar.rb
+++ b/test/psych/test_scalar.rb
@@ -1,4 +1,5 @@
# -*- coding: utf-8 -*-
+# frozen_string_literal: false
require_relative 'helper'
diff --git a/test/psych/test_scalar_scanner.rb b/test/psych/test_scalar_scanner.rb
index e8e423cb05..7ad18c557b 100644
--- a/test/psych/test_scalar_scanner.rb
+++ b/test/psych/test_scalar_scanner.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
require 'date'
diff --git a/test/psych/test_serialize_subclasses.rb b/test/psych/test_serialize_subclasses.rb
index f597b7a051..be209edf2f 100644
--- a/test/psych/test_serialize_subclasses.rb
+++ b/test/psych/test_serialize_subclasses.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_set.rb b/test/psych/test_set.rb
index 921fe2284f..0eb999cb2f 100644
--- a/test/psych/test_set.rb
+++ b/test/psych/test_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_stream.rb b/test/psych/test_stream.rb
index 7e41178e34..1b054289ea 100644
--- a/test/psych/test_stream.rb
+++ b/test/psych/test_stream.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_string.rb b/test/psych/test_string.rb
index a8ae55cabe..51aef40858 100644
--- a/test/psych/test_string.rb
+++ b/test/psych/test_string.rb
@@ -1,4 +1,5 @@
# encoding: UTF-8
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_struct.rb b/test/psych/test_struct.rb
index 8c7f2513ce..b7968d3189 100644
--- a/test/psych/test_struct.rb
+++ b/test/psych/test_struct.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
class PsychStructWithIvar < Struct.new(:foo)
diff --git a/test/psych/test_symbol.rb b/test/psych/test_symbol.rb
index 558a672886..a98881cf4b 100644
--- a/test/psych/test_symbol.rb
+++ b/test/psych/test_symbol.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_tainted.rb b/test/psych/test_tainted.rb
index 37fc5b2b80..870583323d 100644
--- a/test/psych/test_tainted.rb
+++ b/test/psych/test_tainted.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_to_yaml_properties.rb b/test/psych/test_to_yaml_properties.rb
index 724aab4f0e..8a29b6a9b9 100644
--- a/test/psych/test_to_yaml_properties.rb
+++ b/test/psych/test_to_yaml_properties.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_tree_builder.rb b/test/psych/test_tree_builder.rb
index 7ad3ddd8a0..09f1ee30c9 100644
--- a/test/psych/test_tree_builder.rb
+++ b/test/psych/test_tree_builder.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
module Psych
diff --git a/test/psych/test_yaml.rb b/test/psych/test_yaml.rb
index e6281753a5..f8e9e2f955 100644
--- a/test/psych/test_yaml.rb
+++ b/test/psych/test_yaml.rb
@@ -1,4 +1,5 @@
# -*- coding: us-ascii; mode: ruby; ruby-indent-level: 4; tab-width: 4 -*-
+# frozen_string_literal: false
# vim:sw=4:ts=4
# $Id$
#
diff --git a/test/psych/test_yamldbm.rb b/test/psych/test_yamldbm.rb
index 62c88b753e..71ee04f863 100644
--- a/test/psych/test_yamldbm.rb
+++ b/test/psych/test_yamldbm.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
require 'tmpdir'
diff --git a/test/psych/test_yamlstore.rb b/test/psych/test_yamlstore.rb
index 94f1330d37..a9ce652ced 100644
--- a/test/psych/test_yamlstore.rb
+++ b/test/psych/test_yamlstore.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'helper'
require 'yaml/store'
require 'tmpdir'
diff --git a/test/psych/visitors/test_depth_first.rb b/test/psych/visitors/test_depth_first.rb
index 837c8e8c11..8072c26b57 100644
--- a/test/psych/visitors/test_depth_first.rb
+++ b/test/psych/visitors/test_depth_first.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'psych/helper'
module Psych
diff --git a/test/psych/visitors/test_emitter.rb b/test/psych/visitors/test_emitter.rb
index 780c953693..9317855bbb 100644
--- a/test/psych/visitors/test_emitter.rb
+++ b/test/psych/visitors/test_emitter.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'psych/helper'
module Psych
diff --git a/test/psych/visitors/test_to_ruby.rb b/test/psych/visitors/test_to_ruby.rb
index 19e5365244..8878ea22b2 100644
--- a/test/psych/visitors/test_to_ruby.rb
+++ b/test/psych/visitors/test_to_ruby.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require 'psych/helper'
module Psych
diff --git a/test/psych/visitors/test_yaml_tree.rb b/test/psych/visitors/test_yaml_tree.rb
index 40702bce79..b3890bcd72 100644
--- a/test/psych/visitors/test_yaml_tree.rb
+++ b/test/psych/visitors/test_yaml_tree.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'psych/helper'
module Psych
diff --git a/test/rdoc/test_rdoc_alias.rb b/test/rdoc/test_rdoc_alias.rb
index ff499af962..fa0ab0f366 100644
--- a/test/rdoc/test_rdoc_alias.rb
+++ b/test/rdoc/test_rdoc_alias.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require File.expand_path '../xref_test_case', __FILE__
class TestRDocAlias < XrefTestCase
diff --git a/test/rdoc/test_rdoc_any_method.rb b/test/rdoc/test_rdoc_any_method.rb
index 90305807f8..fdbb62efa6 100644
--- a/test/rdoc/test_rdoc_any_method.rb
+++ b/test/rdoc/test_rdoc_any_method.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require File.expand_path '../xref_test_case', __FILE__
class TestRDocAnyMethod < XrefTestCase
diff --git a/test/rdoc/test_rdoc_attr.rb b/test/rdoc/test_rdoc_attr.rb
index a4922df06c..e4062d1807 100644
--- a/test/rdoc/test_rdoc_attr.rb
+++ b/test/rdoc/test_rdoc_attr.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocAttr < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_class_module.rb b/test/rdoc/test_rdoc_class_module.rb
index 0e06587dc6..7cbbcbcc52 100644
--- a/test/rdoc/test_rdoc_class_module.rb
+++ b/test/rdoc/test_rdoc_class_module.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require File.expand_path '../xref_test_case', __FILE__
class TestRDocClassModule < XrefTestCase
diff --git a/test/rdoc/test_rdoc_code_object.rb b/test/rdoc/test_rdoc_code_object.rb
index 2fb6ac23a5..74b88557e0 100644
--- a/test/rdoc/test_rdoc_code_object.rb
+++ b/test/rdoc/test_rdoc_code_object.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require File.expand_path '../xref_test_case', __FILE__
diff --git a/test/rdoc/test_rdoc_comment.rb b/test/rdoc/test_rdoc_comment.rb
index 2a1318b66c..178c579ea7 100644
--- a/test/rdoc/test_rdoc_comment.rb
+++ b/test/rdoc/test_rdoc_comment.rb
@@ -1,4 +1,5 @@
# coding: us-ascii
+# frozen_string_literal: false
require 'rdoc/test_case'
diff --git a/test/rdoc/test_rdoc_constant.rb b/test/rdoc/test_rdoc_constant.rb
index 171963d8e4..c43aa7dc2b 100644
--- a/test/rdoc/test_rdoc_constant.rb
+++ b/test/rdoc/test_rdoc_constant.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require File.expand_path '../xref_test_case', __FILE__
class TestRDocConstant < XrefTestCase
diff --git a/test/rdoc/test_rdoc_context.rb b/test/rdoc/test_rdoc_context.rb
index c981cf3b11..c619c6cacb 100644
--- a/test/rdoc/test_rdoc_context.rb
+++ b/test/rdoc/test_rdoc_context.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require File.expand_path '../xref_test_case', __FILE__
class TestRDocContext < XrefTestCase
diff --git a/test/rdoc/test_rdoc_context_section.rb b/test/rdoc/test_rdoc_context_section.rb
index b8f8c7f756..bd82d191b6 100644
--- a/test/rdoc/test_rdoc_context_section.rb
+++ b/test/rdoc/test_rdoc_context_section.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocContextSection < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_cross_reference.rb b/test/rdoc/test_rdoc_cross_reference.rb
index 99fc224d88..c39d6ad356 100644
--- a/test/rdoc/test_rdoc_cross_reference.rb
+++ b/test/rdoc/test_rdoc_cross_reference.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require File.expand_path '../xref_test_case', __FILE__
class TestRDocCrossReference < XrefTestCase
diff --git a/test/rdoc/test_rdoc_encoding.rb b/test/rdoc/test_rdoc_encoding.rb
index 7ec39f8a9c..313ede2bde 100644
--- a/test/rdoc/test_rdoc_encoding.rb
+++ b/test/rdoc/test_rdoc_encoding.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require 'rdoc/test_case'
diff --git a/test/rdoc/test_rdoc_extend.rb b/test/rdoc/test_rdoc_extend.rb
index 149931549d..bc50a657ac 100644
--- a/test/rdoc/test_rdoc_extend.rb
+++ b/test/rdoc/test_rdoc_extend.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require File.expand_path '../xref_test_case', __FILE__
class TestRDocExtend < XrefTestCase
diff --git a/test/rdoc/test_rdoc_generator_darkfish.rb b/test/rdoc/test_rdoc_generator_darkfish.rb
index fc77e4b105..894acbd4f2 100644
--- a/test/rdoc/test_rdoc_generator_darkfish.rb
+++ b/test/rdoc/test_rdoc_generator_darkfish.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocGeneratorDarkfish < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_generator_json_index.rb b/test/rdoc/test_rdoc_generator_json_index.rb
index 9283fd9b76..13e7850a24 100644
--- a/test/rdoc/test_rdoc_generator_json_index.rb
+++ b/test/rdoc/test_rdoc_generator_json_index.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require 'rdoc/test_case'
diff --git a/test/rdoc/test_rdoc_generator_markup.rb b/test/rdoc/test_rdoc_generator_markup.rb
index 5f8a45bd0e..d546c2f87f 100644
--- a/test/rdoc/test_rdoc_generator_markup.rb
+++ b/test/rdoc/test_rdoc_generator_markup.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocGeneratorMarkup < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_generator_pot.rb b/test/rdoc/test_rdoc_generator_pot.rb
index d028ce71de..3f1bee70c9 100644
--- a/test/rdoc/test_rdoc_generator_pot.rb
+++ b/test/rdoc/test_rdoc_generator_pot.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocGeneratorPOT < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_generator_pot_po.rb b/test/rdoc/test_rdoc_generator_pot_po.rb
index fae7f7ed6e..ae60ff004e 100644
--- a/test/rdoc/test_rdoc_generator_pot_po.rb
+++ b/test/rdoc/test_rdoc_generator_pot_po.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocGeneratorPOTPO < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_generator_pot_po_entry.rb b/test/rdoc/test_rdoc_generator_pot_po_entry.rb
index 8620d98bf8..36b85df864 100644
--- a/test/rdoc/test_rdoc_generator_pot_po_entry.rb
+++ b/test/rdoc/test_rdoc_generator_pot_po_entry.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocGeneratorPOTPOEntry < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_generator_ri.rb b/test/rdoc/test_rdoc_generator_ri.rb
index f8ac97337d..1e18e13b10 100644
--- a/test/rdoc/test_rdoc_generator_ri.rb
+++ b/test/rdoc/test_rdoc_generator_ri.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocGeneratorRI < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_i18n_locale.rb b/test/rdoc/test_rdoc_i18n_locale.rb
index 69de88a9f2..e9dce78472 100644
--- a/test/rdoc/test_rdoc_i18n_locale.rb
+++ b/test/rdoc/test_rdoc_i18n_locale.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocI18nLocale < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_i18n_text.rb b/test/rdoc/test_rdoc_i18n_text.rb
index c47f03c1af..61df193969 100644
--- a/test/rdoc/test_rdoc_i18n_text.rb
+++ b/test/rdoc/test_rdoc_i18n_text.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocI18nText < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_include.rb b/test/rdoc/test_rdoc_include.rb
index 464a698018..6a34f5d4b8 100644
--- a/test/rdoc/test_rdoc_include.rb
+++ b/test/rdoc/test_rdoc_include.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require File.expand_path '../xref_test_case', __FILE__
class TestRDocInclude < XrefTestCase
diff --git a/test/rdoc/test_rdoc_markdown.rb b/test/rdoc/test_rdoc_markdown.rb
index ea5dc73387..6c7bf4ae32 100644
--- a/test/rdoc/test_rdoc_markdown.rb
+++ b/test/rdoc/test_rdoc_markdown.rb
@@ -1,4 +1,5 @@
# coding: UTF-8
+# frozen_string_literal: false
require 'rdoc/test_case'
require 'rdoc/markup/block_quote'
diff --git a/test/rdoc/test_rdoc_markdown_test.rb b/test/rdoc/test_rdoc_markdown_test.rb
index d464cba263..0d880e0a7c 100644
--- a/test/rdoc/test_rdoc_markdown_test.rb
+++ b/test/rdoc/test_rdoc_markdown_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems'
require 'minitest/autorun'
require 'pp'
diff --git a/test/rdoc/test_rdoc_markup.rb b/test/rdoc/test_rdoc_markup.rb
index 5c28a2c6e6..ad13211f7b 100644
--- a/test/rdoc/test_rdoc_markup.rb
+++ b/test/rdoc/test_rdoc_markup.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkup < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_markup_attribute_manager.rb b/test/rdoc/test_rdoc_markup_attribute_manager.rb
index 6a085fe7f5..c0f7666a01 100644
--- a/test/rdoc/test_rdoc_markup_attribute_manager.rb
+++ b/test/rdoc/test_rdoc_markup_attribute_manager.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkupAttributeManager < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_markup_attributes.rb b/test/rdoc/test_rdoc_markup_attributes.rb
index 636e0cca68..077b6a5474 100644
--- a/test/rdoc/test_rdoc_markup_attributes.rb
+++ b/test/rdoc/test_rdoc_markup_attributes.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkupAttributes < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_markup_document.rb b/test/rdoc/test_rdoc_markup_document.rb
index 718ae6d4c4..e5a61daea5 100644
--- a/test/rdoc/test_rdoc_markup_document.rb
+++ b/test/rdoc/test_rdoc_markup_document.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkupDocument < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_markup_formatter.rb b/test/rdoc/test_rdoc_markup_formatter.rb
index d01a42fca6..02a6844a3a 100644
--- a/test/rdoc/test_rdoc_markup_formatter.rb
+++ b/test/rdoc/test_rdoc_markup_formatter.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkupFormatter < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_markup_hard_break.rb b/test/rdoc/test_rdoc_markup_hard_break.rb
index b9f7873160..5d2d359646 100644
--- a/test/rdoc/test_rdoc_markup_hard_break.rb
+++ b/test/rdoc/test_rdoc_markup_hard_break.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkupHardBreak < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_markup_heading.rb b/test/rdoc/test_rdoc_markup_heading.rb
index 26d4b5bffc..463df7ef43 100644
--- a/test/rdoc/test_rdoc_markup_heading.rb
+++ b/test/rdoc/test_rdoc_markup_heading.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkupHeading < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_markup_include.rb b/test/rdoc/test_rdoc_markup_include.rb
index 37a5b320e9..e72a0ac1bb 100644
--- a/test/rdoc/test_rdoc_markup_include.rb
+++ b/test/rdoc/test_rdoc_markup_include.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkupInclude < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_markup_indented_paragraph.rb b/test/rdoc/test_rdoc_markup_indented_paragraph.rb
index d8dd795e5b..efcd840453 100644
--- a/test/rdoc/test_rdoc_markup_indented_paragraph.rb
+++ b/test/rdoc/test_rdoc_markup_indented_paragraph.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkupIndentedParagraph < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_markup_paragraph.rb b/test/rdoc/test_rdoc_markup_paragraph.rb
index 8de1c3cff5..6da6658c6f 100644
--- a/test/rdoc/test_rdoc_markup_paragraph.rb
+++ b/test/rdoc/test_rdoc_markup_paragraph.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkupParagraph < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_markup_parser.rb b/test/rdoc/test_rdoc_markup_parser.rb
index d27fb42f9a..e9986553c0 100644
--- a/test/rdoc/test_rdoc_markup_parser.rb
+++ b/test/rdoc/test_rdoc_markup_parser.rb
@@ -1,4 +1,5 @@
# coding: utf-8
+# frozen_string_literal: false
require 'rdoc/test_case'
diff --git a/test/rdoc/test_rdoc_markup_pre_process.rb b/test/rdoc/test_rdoc_markup_pre_process.rb
index 7cbe29c5a9..8bc474a8fc 100644
--- a/test/rdoc/test_rdoc_markup_pre_process.rb
+++ b/test/rdoc/test_rdoc_markup_pre_process.rb
@@ -1,4 +1,5 @@
# coding: utf-8
+# frozen_string_literal: false
require 'rdoc/test_case'
diff --git a/test/rdoc/test_rdoc_markup_raw.rb b/test/rdoc/test_rdoc_markup_raw.rb
index 43bfe0c3b1..1453333b9e 100644
--- a/test/rdoc/test_rdoc_markup_raw.rb
+++ b/test/rdoc/test_rdoc_markup_raw.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkupRaw < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_markup_to_ansi.rb b/test/rdoc/test_rdoc_markup_to_ansi.rb
index 5afaf94350..8bd49271c1 100644
--- a/test/rdoc/test_rdoc_markup_to_ansi.rb
+++ b/test/rdoc/test_rdoc_markup_to_ansi.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkupToAnsi < RDoc::Markup::TextFormatterTestCase
diff --git a/test/rdoc/test_rdoc_markup_to_bs.rb b/test/rdoc/test_rdoc_markup_to_bs.rb
index f2e6352b69..33d274a97f 100644
--- a/test/rdoc/test_rdoc_markup_to_bs.rb
+++ b/test/rdoc/test_rdoc_markup_to_bs.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkupToBs < RDoc::Markup::TextFormatterTestCase
diff --git a/test/rdoc/test_rdoc_markup_to_html.rb b/test/rdoc/test_rdoc_markup_to_html.rb
index dbbd287188..1c7c879980 100644
--- a/test/rdoc/test_rdoc_markup_to_html.rb
+++ b/test/rdoc/test_rdoc_markup_to_html.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkupToHtml < RDoc::Markup::FormatterTestCase
diff --git a/test/rdoc/test_rdoc_markup_to_html_crossref.rb b/test/rdoc/test_rdoc_markup_to_html_crossref.rb
index 872daea1dc..39a482740f 100644
--- a/test/rdoc/test_rdoc_markup_to_html_crossref.rb
+++ b/test/rdoc/test_rdoc_markup_to_html_crossref.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require File.expand_path '../xref_test_case', __FILE__
class TestRDocMarkupToHtmlCrossref < XrefTestCase
diff --git a/test/rdoc/test_rdoc_markup_to_html_snippet.rb b/test/rdoc/test_rdoc_markup_to_html_snippet.rb
index f861db1849..11bcd526be 100644
--- a/test/rdoc/test_rdoc_markup_to_html_snippet.rb
+++ b/test/rdoc/test_rdoc_markup_to_html_snippet.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkupToHtmlSnippet < RDoc::Markup::FormatterTestCase
diff --git a/test/rdoc/test_rdoc_markup_to_joined_paragraph.rb b/test/rdoc/test_rdoc_markup_to_joined_paragraph.rb
index 148edb1772..414b7d3732 100644
--- a/test/rdoc/test_rdoc_markup_to_joined_paragraph.rb
+++ b/test/rdoc/test_rdoc_markup_to_joined_paragraph.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkupToJoinedParagraph < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_markup_to_label.rb b/test/rdoc/test_rdoc_markup_to_label.rb
index d8cc365069..35df69c2ac 100644
--- a/test/rdoc/test_rdoc_markup_to_label.rb
+++ b/test/rdoc/test_rdoc_markup_to_label.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkupToLabel < RDoc::Markup::FormatterTestCase
diff --git a/test/rdoc/test_rdoc_markup_to_markdown.rb b/test/rdoc/test_rdoc_markup_to_markdown.rb
index 442bb19e9c..a72f30ee01 100644
--- a/test/rdoc/test_rdoc_markup_to_markdown.rb
+++ b/test/rdoc/test_rdoc_markup_to_markdown.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkupToMarkdown < RDoc::Markup::TextFormatterTestCase
diff --git a/test/rdoc/test_rdoc_markup_to_rdoc.rb b/test/rdoc/test_rdoc_markup_to_rdoc.rb
index 4b60d0133e..0dce0a0d5a 100644
--- a/test/rdoc/test_rdoc_markup_to_rdoc.rb
+++ b/test/rdoc/test_rdoc_markup_to_rdoc.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkupToRDoc < RDoc::Markup::TextFormatterTestCase
diff --git a/test/rdoc/test_rdoc_markup_to_table_of_contents.rb b/test/rdoc/test_rdoc_markup_to_table_of_contents.rb
index ba17b845a7..acfa807948 100644
--- a/test/rdoc/test_rdoc_markup_to_table_of_contents.rb
+++ b/test/rdoc/test_rdoc_markup_to_table_of_contents.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkupToTableOfContents < RDoc::Markup::FormatterTestCase
diff --git a/test/rdoc/test_rdoc_markup_to_tt_only.rb b/test/rdoc/test_rdoc_markup_to_tt_only.rb
index 2e950dd1b0..a7918c90ab 100644
--- a/test/rdoc/test_rdoc_markup_to_tt_only.rb
+++ b/test/rdoc/test_rdoc_markup_to_tt_only.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkupToTtOnly < RDoc::Markup::FormatterTestCase
diff --git a/test/rdoc/test_rdoc_markup_verbatim.rb b/test/rdoc/test_rdoc_markup_verbatim.rb
index 781d52849a..6fdf8fde28 100644
--- a/test/rdoc/test_rdoc_markup_verbatim.rb
+++ b/test/rdoc/test_rdoc_markup_verbatim.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocMarkupVerbatim < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_method_attr.rb b/test/rdoc/test_rdoc_method_attr.rb
index e93e81cee4..70f129ef32 100644
--- a/test/rdoc/test_rdoc_method_attr.rb
+++ b/test/rdoc/test_rdoc_method_attr.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require File.expand_path '../xref_test_case', __FILE__
class TestRDocMethodAttr < XrefTestCase
diff --git a/test/rdoc/test_rdoc_normal_class.rb b/test/rdoc/test_rdoc_normal_class.rb
index ab31a8dd12..9153bdc839 100644
--- a/test/rdoc/test_rdoc_normal_class.rb
+++ b/test/rdoc/test_rdoc_normal_class.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require File.expand_path '../xref_test_case', __FILE__
class TestRDocNormalClass < XrefTestCase
diff --git a/test/rdoc/test_rdoc_normal_module.rb b/test/rdoc/test_rdoc_normal_module.rb
index 1944564596..d92a72e7bf 100644
--- a/test/rdoc/test_rdoc_normal_module.rb
+++ b/test/rdoc/test_rdoc_normal_module.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require File.expand_path '../xref_test_case', __FILE__
class TestRDocNormalModule < XrefTestCase
diff --git a/test/rdoc/test_rdoc_options.rb b/test/rdoc/test_rdoc_options.rb
index 67053e3e33..5d79432f94 100644
--- a/test/rdoc/test_rdoc_options.rb
+++ b/test/rdoc/test_rdoc_options.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocOptions < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_parser.rb b/test/rdoc/test_rdoc_parser.rb
index 34d4486cb1..ee2865ce02 100644
--- a/test/rdoc/test_rdoc_parser.rb
+++ b/test/rdoc/test_rdoc_parser.rb
@@ -1,4 +1,5 @@
# -*- coding: us-ascii -*-
+# frozen_string_literal: false
require 'rdoc/test_case'
diff --git a/test/rdoc/test_rdoc_parser_c.rb b/test/rdoc/test_rdoc_parser_c.rb
index 71ffce5f9a..fdc303e3e5 100644
--- a/test/rdoc/test_rdoc_parser_c.rb
+++ b/test/rdoc/test_rdoc_parser_c.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
=begin
diff --git a/test/rdoc/test_rdoc_parser_changelog.rb b/test/rdoc/test_rdoc_parser_changelog.rb
index 4d83983092..0135d26d87 100644
--- a/test/rdoc/test_rdoc_parser_changelog.rb
+++ b/test/rdoc/test_rdoc_parser_changelog.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocParserChangeLog < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_parser_markdown.rb b/test/rdoc/test_rdoc_parser_markdown.rb
index b17e14432b..a8a8402946 100644
--- a/test/rdoc/test_rdoc_parser_markdown.rb
+++ b/test/rdoc/test_rdoc_parser_markdown.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocParserMarkdown < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_parser_rd.rb b/test/rdoc/test_rdoc_parser_rd.rb
index 9be0d7d31c..481d190ffe 100644
--- a/test/rdoc/test_rdoc_parser_rd.rb
+++ b/test/rdoc/test_rdoc_parser_rd.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocParserRd < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_parser_ruby.rb b/test/rdoc/test_rdoc_parser_ruby.rb
index 8750433ff1..2befa87542 100644
--- a/test/rdoc/test_rdoc_parser_ruby.rb
+++ b/test/rdoc/test_rdoc_parser_ruby.rb
@@ -1,4 +1,5 @@
# coding: utf-8
+# frozen_string_literal: false
require 'rdoc/test_case'
diff --git a/test/rdoc/test_rdoc_parser_simple.rb b/test/rdoc/test_rdoc_parser_simple.rb
index d45a99358a..0e2cf0d9a9 100644
--- a/test/rdoc/test_rdoc_parser_simple.rb
+++ b/test/rdoc/test_rdoc_parser_simple.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocParserSimple < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_rd.rb b/test/rdoc/test_rdoc_rd.rb
index d917a63661..938c5569f9 100644
--- a/test/rdoc/test_rdoc_rd.rb
+++ b/test/rdoc/test_rdoc_rd.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocRd < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_rd_block_parser.rb b/test/rdoc/test_rdoc_rd_block_parser.rb
index 956f3d2822..7afa9a03dd 100644
--- a/test/rdoc/test_rdoc_rd_block_parser.rb
+++ b/test/rdoc/test_rdoc_rd_block_parser.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocRdBlockParser < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_rd_inline.rb b/test/rdoc/test_rdoc_rd_inline.rb
index d601ecca1a..d4448e4397 100644
--- a/test/rdoc/test_rdoc_rd_inline.rb
+++ b/test/rdoc/test_rdoc_rd_inline.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocRdInline < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_rd_inline_parser.rb b/test/rdoc/test_rdoc_rd_inline_parser.rb
index e4a765b4fb..eb022b240f 100644
--- a/test/rdoc/test_rdoc_rd_inline_parser.rb
+++ b/test/rdoc/test_rdoc_rd_inline_parser.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocRdInlineParser < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_rdoc.rb b/test/rdoc/test_rdoc_rdoc.rb
index 230c18fde2..793580de86 100644
--- a/test/rdoc/test_rdoc_rdoc.rb
+++ b/test/rdoc/test_rdoc_rdoc.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocRDoc < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_require.rb b/test/rdoc/test_rdoc_require.rb
index b7995aff7b..cbedf5c8a4 100644
--- a/test/rdoc/test_rdoc_require.rb
+++ b/test/rdoc/test_rdoc_require.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require File.expand_path '../xref_test_case', __FILE__
class TestRDocRequire < XrefTestCase
diff --git a/test/rdoc/test_rdoc_ri_driver.rb b/test/rdoc/test_rdoc_ri_driver.rb
index d0987a01c3..cba7bedb2a 100644
--- a/test/rdoc/test_rdoc_ri_driver.rb
+++ b/test/rdoc/test_rdoc_ri_driver.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocRIDriver < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_ri_paths.rb b/test/rdoc/test_rdoc_ri_paths.rb
index e377b0b1d0..06968b5510 100644
--- a/test/rdoc/test_rdoc_ri_paths.rb
+++ b/test/rdoc/test_rdoc_ri_paths.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocRIPaths < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_ruby_lex.rb b/test/rdoc/test_rdoc_ruby_lex.rb
index 8871b4f412..6356fa2894 100644
--- a/test/rdoc/test_rdoc_ruby_lex.rb
+++ b/test/rdoc/test_rdoc_ruby_lex.rb
@@ -1,4 +1,5 @@
# coding: UTF-8
+# frozen_string_literal: false
require 'rdoc/test_case'
diff --git a/test/rdoc/test_rdoc_ruby_token.rb b/test/rdoc/test_rdoc_ruby_token.rb
index ed8c8275ba..4638606ef3 100644
--- a/test/rdoc/test_rdoc_ruby_token.rb
+++ b/test/rdoc/test_rdoc_ruby_token.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocRubyToken < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_rubygems_hook.rb b/test/rdoc/test_rdoc_rubygems_hook.rb
index 960afc9ed4..9ab481cbd4 100644
--- a/test/rdoc/test_rdoc_rubygems_hook.rb
+++ b/test/rdoc/test_rdoc_rubygems_hook.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems'
require 'rubygems/test_case'
require 'rdoc/rubygems_hook'
diff --git a/test/rdoc/test_rdoc_servlet.rb b/test/rdoc/test_rdoc_servlet.rb
index 9edd176cc4..1ea0de7a26 100644
--- a/test/rdoc/test_rdoc_servlet.rb
+++ b/test/rdoc/test_rdoc_servlet.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocServlet < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_single_class.rb b/test/rdoc/test_rdoc_single_class.rb
index e368b3d6fd..85a99d2229 100644
--- a/test/rdoc/test_rdoc_single_class.rb
+++ b/test/rdoc/test_rdoc_single_class.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocSingleClass < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_stats.rb b/test/rdoc/test_rdoc_stats.rb
index cd37c29fce..34e1417783 100644
--- a/test/rdoc/test_rdoc_stats.rb
+++ b/test/rdoc/test_rdoc_stats.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocStats < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_store.rb b/test/rdoc/test_rdoc_store.rb
index bd565e7149..c1717549c6 100644
--- a/test/rdoc/test_rdoc_store.rb
+++ b/test/rdoc/test_rdoc_store.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require File.expand_path '../xref_test_case', __FILE__
class TestRDocStore < XrefTestCase
diff --git a/test/rdoc/test_rdoc_task.rb b/test/rdoc/test_rdoc_task.rb
index 610684e540..bb5d2ae134 100644
--- a/test/rdoc/test_rdoc_task.rb
+++ b/test/rdoc/test_rdoc_task.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
begin
require 'rake'
diff --git a/test/rdoc/test_rdoc_text.rb b/test/rdoc/test_rdoc_text.rb
index a69989d15d..3945b6e718 100644
--- a/test/rdoc/test_rdoc_text.rb
+++ b/test/rdoc/test_rdoc_text.rb
@@ -1,4 +1,5 @@
# coding: utf-8
+# frozen_string_literal: false
require 'rdoc/test_case'
diff --git a/test/rdoc/test_rdoc_token_stream.rb b/test/rdoc/test_rdoc_token_stream.rb
index 3c1a225c25..5ed7b1d1a9 100644
--- a/test/rdoc/test_rdoc_token_stream.rb
+++ b/test/rdoc/test_rdoc_token_stream.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocTokenStream < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_tom_doc.rb b/test/rdoc/test_rdoc_tom_doc.rb
index 63d3a5e79e..7076edfa72 100644
--- a/test/rdoc/test_rdoc_tom_doc.rb
+++ b/test/rdoc/test_rdoc_tom_doc.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rdoc/test_case'
class TestRDocTomDoc < RDoc::TestCase
diff --git a/test/rdoc/test_rdoc_top_level.rb b/test/rdoc/test_rdoc_top_level.rb
index f3ee6a4784..b8145e3f9d 100644
--- a/test/rdoc/test_rdoc_top_level.rb
+++ b/test/rdoc/test_rdoc_top_level.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require File.expand_path '../xref_test_case', __FILE__
class TestRDocTopLevel < XrefTestCase
diff --git a/test/rdoc/xref_data.rb b/test/rdoc/xref_data.rb
index 4525a293ab..5d3f6a9a55 100644
--- a/test/rdoc/xref_data.rb
+++ b/test/rdoc/xref_data.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
XREF_DATA = <<-XREF_DATA
class C1
diff --git a/test/rdoc/xref_test_case.rb b/test/rdoc/xref_test_case.rb
index a56fa71268..c0b3ae5abd 100644
--- a/test/rdoc/xref_test_case.rb
+++ b/test/rdoc/xref_test_case.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
ENV['RDOC_TEST'] = 'yes'
require 'rdoc'
diff --git a/test/readline/test_readline.rb b/test/readline/test_readline.rb
index 89d72b560f..eae9518fb3 100644
--- a/test/readline/test_readline.rb
+++ b/test/readline/test_readline.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require "readline"
rescue LoadError
diff --git a/test/readline/test_readline_history.rb b/test/readline/test_readline_history.rb
index 4bcd7b3b25..a9a324fb9e 100644
--- a/test/readline/test_readline_history.rb
+++ b/test/readline/test_readline_history.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require "readline"
=begin
diff --git a/test/resolv/test_addr.rb b/test/resolv/test_addr.rb
index e06c3c2a4c..4a2df5bfca 100644
--- a/test/resolv/test_addr.rb
+++ b/test/resolv/test_addr.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'resolv'
require 'socket'
diff --git a/test/resolv/test_dns.rb b/test/resolv/test_dns.rb
index 9f993ba96a..338130e64f 100644
--- a/test/resolv/test_dns.rb
+++ b/test/resolv/test_dns.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'resolv'
require 'socket'
diff --git a/test/resolv/test_resource.rb b/test/resolv/test_resource.rb
index 7ec17e33e7..8045bbc6ee 100644
--- a/test/resolv/test_resource.rb
+++ b/test/resolv/test_resource.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'resolv'
diff --git a/test/rexml/listener.rb b/test/rexml/listener.rb
index 81c9e8822c..6bede03c59 100644
--- a/test/rexml/listener.rb
+++ b/test/rexml/listener.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
class Listener
attr_reader :ts, :te
attr_reader :normalize
diff --git a/test/rexml/parse/test_document_type_declaration.rb b/test/rexml/parse/test_document_type_declaration.rb
index 59fe561155..80f70888fb 100644
--- a/test/rexml/parse/test_document_type_declaration.rb
+++ b/test/rexml/parse/test_document_type_declaration.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "rexml/document"
diff --git a/test/rexml/parse/test_notation_declaration.rb b/test/rexml/parse/test_notation_declaration.rb
index 0a4e737abf..0d29f0d81f 100644
--- a/test/rexml/parse/test_notation_declaration.rb
+++ b/test/rexml/parse/test_notation_declaration.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'rexml/document'
diff --git a/test/rexml/parser/test_sax2.rb b/test/rexml/parser/test_sax2.rb
index dba5eab033..91d135f5f7 100644
--- a/test/rexml/parser/test_sax2.rb
+++ b/test/rexml/parser/test_sax2.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "rexml/parsers/sax2parser"
require "rexml/sax2listener"
diff --git a/test/rexml/parser/test_tree.rb b/test/rexml/parser/test_tree.rb
index fa010f6975..7ab0addca1 100644
--- a/test/rexml/parser/test_tree.rb
+++ b/test/rexml/parser/test_tree.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "rexml/document"
require "rexml/parsers/treeparser"
diff --git a/test/rexml/parser/test_ultra_light.rb b/test/rexml/parser/test_ultra_light.rb
index 4960fc16dc..c48a13d311 100644
--- a/test/rexml/parser/test_ultra_light.rb
+++ b/test/rexml/parser/test_ultra_light.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "rexml/parsers/ultralightparser"
diff --git a/test/rexml/rexml_test_utils.rb b/test/rexml/rexml_test_utils.rb
index 57fe65ca73..7c59629e53 100644
--- a/test/rexml/rexml_test_utils.rb
+++ b/test/rexml/rexml_test_utils.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
module REXMLTestUtils
def fixture_path(*components)
diff --git a/test/rexml/test_attributes.rb b/test/rexml/test_attributes.rb
index aea1d8857c..d6f566bdf8 100644
--- a/test/rexml/test_attributes.rb
+++ b/test/rexml/test_attributes.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit/testcase'
require 'rexml/document'
diff --git a/test/rexml/test_attributes_mixin.rb b/test/rexml/test_attributes_mixin.rb
index 17cca4efc3..3a9f54eefd 100644
--- a/test/rexml/test_attributes_mixin.rb
+++ b/test/rexml/test_attributes_mixin.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'rexml/document'
diff --git a/test/rexml/test_changing_encoding.rb b/test/rexml/test_changing_encoding.rb
index 9471ad13ad..a2dc07254a 100644
--- a/test/rexml/test_changing_encoding.rb
+++ b/test/rexml/test_changing_encoding.rb
@@ -1,4 +1,5 @@
# -*- coding: utf-8 -*-
+# frozen_string_literal: false
require 'rexml/encoding'
diff --git a/test/rexml/test_comment.rb b/test/rexml/test_comment.rb
index d5e78a5cde..0af2f5ca76 100644
--- a/test/rexml/test_comment.rb
+++ b/test/rexml/test_comment.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit/testcase"
require 'rexml/document'
diff --git a/test/rexml/test_contrib.rb b/test/rexml/test_contrib.rb
index fa84ebef3a..8462b3c23f 100644
--- a/test/rexml/test_contrib.rb
+++ b/test/rexml/test_contrib.rb
@@ -1,4 +1,5 @@
# coding: binary
+# frozen_string_literal: false
require_relative "rexml_test_utils"
diff --git a/test/rexml/test_core.rb b/test/rexml/test_core.rb
index 97aada9104..f4eba0bbb3 100644
--- a/test/rexml/test_core.rb
+++ b/test/rexml/test_core.rb
@@ -1,4 +1,5 @@
# coding: binary
+# frozen_string_literal: false
require_relative "rexml_test_utils"
diff --git a/test/rexml/test_doctype.rb b/test/rexml/test_doctype.rb
index 0b3ea11929..91de05b05f 100644
--- a/test/rexml/test_doctype.rb
+++ b/test/rexml/test_doctype.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'rexml/document'
diff --git a/test/rexml/test_document.rb b/test/rexml/test_document.rb
index 46cd6f7dbd..c0faae4ae0 100644
--- a/test/rexml/test_document.rb
+++ b/test/rexml/test_document.rb
@@ -1,4 +1,5 @@
# -*- coding: utf-8 -*-
+# frozen_string_literal: false
require "rexml/document"
require "test/unit"
diff --git a/test/rexml/test_elements.rb b/test/rexml/test_elements.rb
index f253a75daf..a850e62209 100644
--- a/test/rexml/test_elements.rb
+++ b/test/rexml/test_elements.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit/testcase'
require 'rexml/document'
diff --git a/test/rexml/test_encoding.rb b/test/rexml/test_encoding.rb
index 058fb974b2..919db131f0 100644
--- a/test/rexml/test_encoding.rb
+++ b/test/rexml/test_encoding.rb
@@ -1,4 +1,5 @@
# coding: binary
+# frozen_string_literal: false
require_relative "rexml_test_utils"
diff --git a/test/rexml/test_entity.rb b/test/rexml/test_entity.rb
index bef1bd6c01..6dc6637074 100644
--- a/test/rexml/test_entity.rb
+++ b/test/rexml/test_entity.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit/testcase"
require 'rexml/document'
diff --git a/test/rexml/test_functions.rb b/test/rexml/test_functions.rb
index bf501ff0c2..5ac823dd8f 100644
--- a/test/rexml/test_functions.rb
+++ b/test/rexml/test_functions.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit/testcase"
require "rexml/document"
diff --git a/test/rexml/test_functions_number.rb b/test/rexml/test_functions_number.rb
index 0b5ec92f6c..84ec5c7ba7 100644
--- a/test/rexml/test_functions_number.rb
+++ b/test/rexml/test_functions_number.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rexml/document'
require 'test/unit'
require 'rexml/functions'
diff --git a/test/rexml/test_jaxen.rb b/test/rexml/test_jaxen.rb
index 1eec73f3e0..aa9e2998ab 100644
--- a/test/rexml/test_jaxen.rb
+++ b/test/rexml/test_jaxen.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'rexml_test_utils'
require "rexml/document"
diff --git a/test/rexml/test_light.rb b/test/rexml/test_light.rb
index b775eb79e9..99bd9cac3f 100644
--- a/test/rexml/test_light.rb
+++ b/test/rexml/test_light.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rexml_test_utils"
require "rexml/light/node"
require "rexml/parsers/lightparser"
diff --git a/test/rexml/test_lightparser.rb b/test/rexml/test_lightparser.rb
index f8212dcd2e..1aeac072dd 100644
--- a/test/rexml/test_lightparser.rb
+++ b/test/rexml/test_lightparser.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'rexml_test_utils'
require 'rexml/parsers/lightparser'
diff --git a/test/rexml/test_listener.rb b/test/rexml/test_listener.rb
index 309e827880..322d368be8 100644
--- a/test/rexml/test_listener.rb
+++ b/test/rexml/test_listener.rb
@@ -1,4 +1,5 @@
# coding: binary
+# frozen_string_literal: false
require_relative 'rexml_test_utils'
diff --git a/test/rexml/test_martin_fowler.rb b/test/rexml/test_martin_fowler.rb
index 26db110869..da685a80ec 100644
--- a/test/rexml/test_martin_fowler.rb
+++ b/test/rexml/test_martin_fowler.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'rexml/document'
diff --git a/test/rexml/test_namespace.rb b/test/rexml/test_namespace.rb
index f5cd294568..90e1d36945 100644
--- a/test/rexml/test_namespace.rb
+++ b/test/rexml/test_namespace.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rexml_test_utils"
require "rexml/document"
diff --git a/test/rexml/test_order.rb b/test/rexml/test_order.rb
index 0e84961b37..807d9faa96 100644
--- a/test/rexml/test_order.rb
+++ b/test/rexml/test_order.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'rexml_test_utils'
require 'rexml/document'
begin
diff --git a/test/rexml/test_preceding_sibling.rb b/test/rexml/test_preceding_sibling.rb
index 54fdd5b22e..d89a1e1c90 100644
--- a/test/rexml/test_preceding_sibling.rb
+++ b/test/rexml/test_preceding_sibling.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
# ISSUE 32
require 'test/unit'
require 'rexml/document'
diff --git a/test/rexml/test_pullparser.rb b/test/rexml/test_pullparser.rb
index db336a16e5..31b5b74bd6 100644
--- a/test/rexml/test_pullparser.rb
+++ b/test/rexml/test_pullparser.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit/testcase"
require 'rexml/parsers/pullparser'
diff --git a/test/rexml/test_rexml_issuezilla.rb b/test/rexml/test_rexml_issuezilla.rb
index bb634663d5..1c54c9d53d 100644
--- a/test/rexml/test_rexml_issuezilla.rb
+++ b/test/rexml/test_rexml_issuezilla.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative 'rexml_test_utils'
require 'rexml/document'
diff --git a/test/rexml/test_sax.rb b/test/rexml/test_sax.rb
index 2d37ec9dfb..00539f0d4c 100644
--- a/test/rexml/test_sax.rb
+++ b/test/rexml/test_sax.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rexml_test_utils"
require 'rexml/sax2listener'
require 'rexml/parsers/sax2parser'
diff --git a/test/rexml/test_stream.rb b/test/rexml/test_stream.rb
index 3164d91c91..d7ceedc70e 100644
--- a/test/rexml/test_stream.rb
+++ b/test/rexml/test_stream.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit/testcase"
require "rexml/document"
require 'rexml/streamlistener'
diff --git a/test/rexml/test_text.rb b/test/rexml/test_text.rb
index 52ee11ef78..3f8036eee3 100644
--- a/test/rexml/test_text.rb
+++ b/test/rexml/test_text.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "rexml/text"
module REXMLTests
diff --git a/test/rexml/test_ticket_80.rb b/test/rexml/test_ticket_80.rb
index ffeece5692..ab6a57efaf 100644
--- a/test/rexml/test_ticket_80.rb
+++ b/test/rexml/test_ticket_80.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
#------------------------------------------------------------------------------
# file: rexml_test.rb
# desc: test's REXML's XML/XPath implementation
diff --git a/test/rexml/test_validation_rng.rb b/test/rexml/test_validation_rng.rb
index 8989fe2cbf..b5b50450e0 100644
--- a/test/rexml/test_validation_rng.rb
+++ b/test/rexml/test_validation_rng.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit/testcase"
require "rexml/document"
diff --git a/test/rexml/test_xml_declaration.rb b/test/rexml/test_xml_declaration.rb
index a96d40c542..a4d97c41d0 100644
--- a/test/rexml/test_xml_declaration.rb
+++ b/test/rexml/test_xml_declaration.rb
@@ -1,4 +1,5 @@
# -*- coding: utf-8 -*-
+# frozen_string_literal: false
#
# Created by Henrik Mårtensson on 2007-02-18.
# Copyright (c) 2007. All rights reserved.
diff --git a/test/rexml/xpath/test_attribute.rb b/test/rexml/xpath/test_attribute.rb
index 95af4de399..9304db4e0d 100644
--- a/test/rexml/xpath/test_attribute.rb
+++ b/test/rexml/xpath/test_attribute.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'rexml/document'
diff --git a/test/rexml/xpath/test_axis_preceding_sibling.rb b/test/rexml/xpath/test_axis_preceding_sibling.rb
index 273180772a..5842c6bc50 100644
--- a/test/rexml/xpath/test_axis_preceding_sibling.rb
+++ b/test/rexml/xpath/test_axis_preceding_sibling.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit/testcase"
require "rexml/document"
diff --git a/test/rexml/xpath/test_base.rb b/test/rexml/xpath/test_base.rb
index a57ba632c4..5079fdd75a 100644
--- a/test/rexml/xpath/test_base.rb
+++ b/test/rexml/xpath/test_base.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "../rexml_test_utils"
require "rexml/document"
diff --git a/test/rexml/xpath/test_node.rb b/test/rexml/xpath/test_node.rb
index aec2de1cfe..e0e958e70f 100644
--- a/test/rexml/xpath/test_node.rb
+++ b/test/rexml/xpath/test_node.rb
@@ -1,4 +1,5 @@
# -*- coding: utf-8 -*-
+# frozen_string_literal: false
require_relative "../rexml_test_utils"
diff --git a/test/rexml/xpath/test_predicate.rb b/test/rexml/xpath/test_predicate.rb
index 287e131c54..ce1aaa324b 100644
--- a/test/rexml/xpath/test_predicate.rb
+++ b/test/rexml/xpath/test_predicate.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit/testcase"
require "rexml/document"
require "rexml/xpath"
diff --git a/test/rexml/xpath/test_text.rb b/test/rexml/xpath/test_text.rb
index 46aba3c2ef..03afe9667c 100644
--- a/test/rexml/xpath/test_text.rb
+++ b/test/rexml/xpath/test_text.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'rexml/document'
require 'rexml/element'
diff --git a/test/rinda/test_rinda.rb b/test/rinda/test_rinda.rb
index e0b92e690c..07de61438a 100644
--- a/test/rinda/test_rinda.rb
+++ b/test/rinda/test_rinda.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'drb/drb'
diff --git a/test/rinda/test_tuplebag.rb b/test/rinda/test_tuplebag.rb
index 3e30127f0f..ab17ca047c 100644
--- a/test/rinda/test_tuplebag.rb
+++ b/test/rinda/test_tuplebag.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'rinda/tuplespace'
diff --git a/test/ripper/dummyparser.rb b/test/ripper/dummyparser.rb
index 35c08b52bb..3c196d9a23 100644
--- a/test/ripper/dummyparser.rb
+++ b/test/ripper/dummyparser.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
#
# dummyparser.rb
#
diff --git a/test/ripper/test_files.rb b/test/ripper/test_files.rb
index 5541a09368..7b5fa1dc6c 100644
--- a/test/ripper/test_files.rb
+++ b/test/ripper/test_files.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
module TestRipper; end
diff --git a/test/ripper/test_filter.rb b/test/ripper/test_filter.rb
index 005a5d81e2..0f9d38f726 100644
--- a/test/ripper/test_filter.rb
+++ b/test/ripper/test_filter.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require 'ripper'
require 'test/unit'
@@ -76,7 +77,7 @@ class TestRipper::Filter < Test::Unit::TestCase
def test_filter_token
data = {}
- filter = Filter.new(File.read(filename))
+ filter = Filter.new("begin; puts 1; end")
filter.parse(data)
assert_equal("begin", data[:token])
end
diff --git a/test/ripper/test_ripper.rb b/test/ripper/test_ripper.rb
index 1544e5682f..e0b65a04d8 100644
--- a/test/ripper/test_ripper.rb
+++ b/test/ripper/test_ripper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require 'ripper'
require 'test/unit'
diff --git a/test/ripper/test_scanner_events.rb b/test/ripper/test_scanner_events.rb
index 45c16738d0..ab52392eb1 100644
--- a/test/ripper/test_scanner_events.rb
+++ b/test/ripper/test_scanner_events.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
#
# test_scanner_events.rb
#
diff --git a/test/ripper/test_sexp.rb b/test/ripper/test_sexp.rb
index 557ae9b423..46fb7f292a 100644
--- a/test/ripper/test_sexp.rb
+++ b/test/ripper/test_sexp.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require 'ripper'
require 'test/unit'
diff --git a/test/rss/rss-assertions.rb b/test/rss/rss-assertions.rb
index f2e9dc07c9..1bafb02f86 100644
--- a/test/rss/rss-assertions.rb
+++ b/test/rss/rss-assertions.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'erb'
module RSS
diff --git a/test/rss/rss-testcase.rb b/test/rss/rss-testcase.rb
index 2e39433d4a..30067d43b2 100644
--- a/test/rss/rss-testcase.rb
+++ b/test/rss/rss-testcase.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "erb"
require "test/unit"
diff --git a/test/rss/test_1.0.rb b/test/rss/test_1.0.rb
index 758eecf51d..33ae29141b 100644
--- a/test/rss/test_1.0.rb
+++ b/test/rss/test_1.0.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "rexml/document"
require_relative "rss-testcase"
diff --git a/test/rss/test_2.0.rb b/test/rss/test_2.0.rb
index 37285cefa3..650f835010 100644
--- a/test/rss/test_2.0.rb
+++ b/test/rss/test_2.0.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "rexml/document"
require_relative "rss-testcase"
diff --git a/test/rss/test_accessor.rb b/test/rss/test_accessor.rb
index ea15316a5d..7d4424dbbd 100644
--- a/test/rss/test_accessor.rb
+++ b/test/rss/test_accessor.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/1.0"
diff --git a/test/rss/test_atom.rb b/test/rss/test_atom.rb
index 557cb80324..774064eff7 100644
--- a/test/rss/test_atom.rb
+++ b/test/rss/test_atom.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "rexml/document"
require_relative "rss-testcase"
diff --git a/test/rss/test_content.rb b/test/rss/test_content.rb
index 13f22a2152..fc8269df12 100644
--- a/test/rss/test_content.rb
+++ b/test/rss/test_content.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "cgi"
require "rexml/document"
diff --git a/test/rss/test_dublincore.rb b/test/rss/test_dublincore.rb
index eb03d84957..37ef177199 100644
--- a/test/rss/test_dublincore.rb
+++ b/test/rss/test_dublincore.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "cgi"
require "rexml/document"
diff --git a/test/rss/test_image.rb b/test/rss/test_image.rb
index d8f0b26103..0f1cd8c9e2 100644
--- a/test/rss/test_image.rb
+++ b/test/rss/test_image.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "cgi"
require "rexml/document"
diff --git a/test/rss/test_inherit.rb b/test/rss/test_inherit.rb
index 8b640dc319..020f066c5f 100644
--- a/test/rss/test_inherit.rb
+++ b/test/rss/test_inherit.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/1.0"
diff --git a/test/rss/test_itunes.rb b/test/rss/test_itunes.rb
index ec06337f7d..7be001062b 100644
--- a/test/rss/test_itunes.rb
+++ b/test/rss/test_itunes.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "cgi"
require "rexml/document"
diff --git a/test/rss/test_maker_0.9.rb b/test/rss/test_maker_0.9.rb
index f6e39c60b7..64d04bcd10 100644
--- a/test/rss/test_maker_0.9.rb
+++ b/test/rss/test_maker_0.9.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/maker"
diff --git a/test/rss/test_maker_1.0.rb b/test/rss/test_maker_1.0.rb
index b31abb9908..c8f9977e43 100644
--- a/test/rss/test_maker_1.0.rb
+++ b/test/rss/test_maker_1.0.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/maker"
diff --git a/test/rss/test_maker_2.0.rb b/test/rss/test_maker_2.0.rb
index 48c0f91f48..8528611e53 100644
--- a/test/rss/test_maker_2.0.rb
+++ b/test/rss/test_maker_2.0.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/maker"
diff --git a/test/rss/test_maker_atom_entry.rb b/test/rss/test_maker_atom_entry.rb
index 9618723e62..8e41c7c50e 100644
--- a/test/rss/test_maker_atom_entry.rb
+++ b/test/rss/test_maker_atom_entry.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/maker"
diff --git a/test/rss/test_maker_atom_feed.rb b/test/rss/test_maker_atom_feed.rb
index d86600113d..d4eacd36ad 100644
--- a/test/rss/test_maker_atom_feed.rb
+++ b/test/rss/test_maker_atom_feed.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/maker"
diff --git a/test/rss/test_maker_content.rb b/test/rss/test_maker_content.rb
index ba884f16a3..e3b84c53a4 100644
--- a/test/rss/test_maker_content.rb
+++ b/test/rss/test_maker_content.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/maker"
diff --git a/test/rss/test_maker_dc.rb b/test/rss/test_maker_dc.rb
index 977350ca75..f5c8bad2b3 100644
--- a/test/rss/test_maker_dc.rb
+++ b/test/rss/test_maker_dc.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/maker"
diff --git a/test/rss/test_maker_image.rb b/test/rss/test_maker_image.rb
index d01654c91b..cc663c6a5c 100644
--- a/test/rss/test_maker_image.rb
+++ b/test/rss/test_maker_image.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/maker"
diff --git a/test/rss/test_maker_itunes.rb b/test/rss/test_maker_itunes.rb
index 0d47171fdd..03092b1c41 100644
--- a/test/rss/test_maker_itunes.rb
+++ b/test/rss/test_maker_itunes.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/maker"
diff --git a/test/rss/test_maker_slash.rb b/test/rss/test_maker_slash.rb
index ea95a99b68..5e5761ab0f 100644
--- a/test/rss/test_maker_slash.rb
+++ b/test/rss/test_maker_slash.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/maker"
diff --git a/test/rss/test_maker_sy.rb b/test/rss/test_maker_sy.rb
index 7117e3af0c..6f4d6f8390 100644
--- a/test/rss/test_maker_sy.rb
+++ b/test/rss/test_maker_sy.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/maker"
diff --git a/test/rss/test_maker_taxo.rb b/test/rss/test_maker_taxo.rb
index 4c4c2e336a..9a19a52dc4 100644
--- a/test/rss/test_maker_taxo.rb
+++ b/test/rss/test_maker_taxo.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/maker"
diff --git a/test/rss/test_maker_trackback.rb b/test/rss/test_maker_trackback.rb
index 411bf319ca..b49e5c3f57 100644
--- a/test/rss/test_maker_trackback.rb
+++ b/test/rss/test_maker_trackback.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/maker"
diff --git a/test/rss/test_maker_xml-stylesheet.rb b/test/rss/test_maker_xml-stylesheet.rb
index 4f7c62aaeb..4563de9902 100644
--- a/test/rss/test_maker_xml-stylesheet.rb
+++ b/test/rss/test_maker_xml-stylesheet.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/maker"
diff --git a/test/rss/test_parser.rb b/test/rss/test_parser.rb
index 8d8d1e1970..7d64657d57 100644
--- a/test/rss/test_parser.rb
+++ b/test/rss/test_parser.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "tempfile"
require_relative "rss-testcase"
diff --git a/test/rss/test_parser_1.0.rb b/test/rss/test_parser_1.0.rb
index 2efecdaf35..f7be5153af 100644
--- a/test/rss/test_parser_1.0.rb
+++ b/test/rss/test_parser_1.0.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/1.0"
diff --git a/test/rss/test_parser_2.0.rb b/test/rss/test_parser_2.0.rb
index 68c7d1cca0..ac7a67b8b1 100644
--- a/test/rss/test_parser_2.0.rb
+++ b/test/rss/test_parser_2.0.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/2.0"
diff --git a/test/rss/test_parser_atom_entry.rb b/test/rss/test_parser_atom_entry.rb
index 352fbbe7f9..4f54ba3cad 100644
--- a/test/rss/test_parser_atom_entry.rb
+++ b/test/rss/test_parser_atom_entry.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/atom"
diff --git a/test/rss/test_parser_atom_feed.rb b/test/rss/test_parser_atom_feed.rb
index a5731b2f67..626062d23a 100644
--- a/test/rss/test_parser_atom_feed.rb
+++ b/test/rss/test_parser_atom_feed.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/atom"
diff --git a/test/rss/test_setup_maker_0.9.rb b/test/rss/test_setup_maker_0.9.rb
index 2714b9cece..4eae62417a 100644
--- a/test/rss/test_setup_maker_0.9.rb
+++ b/test/rss/test_setup_maker_0.9.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/maker"
diff --git a/test/rss/test_setup_maker_1.0.rb b/test/rss/test_setup_maker_1.0.rb
index 0408ca911e..a9d60ddb97 100644
--- a/test/rss/test_setup_maker_1.0.rb
+++ b/test/rss/test_setup_maker_1.0.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/maker"
diff --git a/test/rss/test_setup_maker_2.0.rb b/test/rss/test_setup_maker_2.0.rb
index fcf1f57836..dffffe6da9 100644
--- a/test/rss/test_setup_maker_2.0.rb
+++ b/test/rss/test_setup_maker_2.0.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/maker"
diff --git a/test/rss/test_setup_maker_atom_entry.rb b/test/rss/test_setup_maker_atom_entry.rb
index ec9df5e70a..f8649ea185 100644
--- a/test/rss/test_setup_maker_atom_entry.rb
+++ b/test/rss/test_setup_maker_atom_entry.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/maker"
diff --git a/test/rss/test_setup_maker_atom_feed.rb b/test/rss/test_setup_maker_atom_feed.rb
index ad2c6939d2..2196f1a46a 100644
--- a/test/rss/test_setup_maker_atom_feed.rb
+++ b/test/rss/test_setup_maker_atom_feed.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/maker"
diff --git a/test/rss/test_setup_maker_itunes.rb b/test/rss/test_setup_maker_itunes.rb
index 246fecf4c0..35ecfb4829 100644
--- a/test/rss/test_setup_maker_itunes.rb
+++ b/test/rss/test_setup_maker_itunes.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/maker"
diff --git a/test/rss/test_setup_maker_slash.rb b/test/rss/test_setup_maker_slash.rb
index cd12db9f91..d6973bed4e 100644
--- a/test/rss/test_setup_maker_slash.rb
+++ b/test/rss/test_setup_maker_slash.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
require "rss/maker"
diff --git a/test/rss/test_slash.rb b/test/rss/test_slash.rb
index 757e7879f2..6746e4488f 100644
--- a/test/rss/test_slash.rb
+++ b/test/rss/test_slash.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "cgi"
require "rexml/document"
diff --git a/test/rss/test_syndication.rb b/test/rss/test_syndication.rb
index 17875f1954..ec3895eafc 100644
--- a/test/rss/test_syndication.rb
+++ b/test/rss/test_syndication.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "cgi"
require "rexml/document"
diff --git a/test/rss/test_taxonomy.rb b/test/rss/test_taxonomy.rb
index 34937e4367..89f49a94c3 100644
--- a/test/rss/test_taxonomy.rb
+++ b/test/rss/test_taxonomy.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "cgi"
require_relative "rss-testcase"
diff --git a/test/rss/test_to_s.rb b/test/rss/test_to_s.rb
index d97cf9d4b0..b8ef0d8da4 100644
--- a/test/rss/test_to_s.rb
+++ b/test/rss/test_to_s.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "rexml/document"
require_relative "rss-testcase"
diff --git a/test/rss/test_trackback.rb b/test/rss/test_trackback.rb
index 8560c254f0..2910b4b344 100644
--- a/test/rss/test_trackback.rb
+++ b/test/rss/test_trackback.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "cgi"
require "rexml/document"
diff --git a/test/rss/test_version.rb b/test/rss/test_version.rb
index d2175ab76a..731e7e5e20 100644
--- a/test/rss/test_version.rb
+++ b/test/rss/test_version.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require_relative "rss-testcase"
module RSS
diff --git a/test/rss/test_xml-stylesheet.rb b/test/rss/test_xml-stylesheet.rb
index c67922f4ec..71be1d8fea 100644
--- a/test/rss/test_xml-stylesheet.rb
+++ b/test/rss/test_xml-stylesheet.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "rexml/document"
require_relative "rss-testcase"
diff --git a/test/ruby/allpairs.rb b/test/ruby/allpairs.rb
index 27b6f5988f..e5893e252a 100644
--- a/test/ruby/allpairs.rb
+++ b/test/ruby/allpairs.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
module AllPairs
module_function
diff --git a/test/ruby/beginmainend.rb b/test/ruby/beginmainend.rb
index ddd4d254c6..b6de5d65fd 100644
--- a/test/ruby/beginmainend.rb
+++ b/test/ruby/beginmainend.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
BEGIN {
puts "b1"
# local_begin1 = "local_begin1"
diff --git a/test/ruby/enc/test_big5.rb b/test/ruby/enc/test_big5.rb
index e8fe0270a8..5dcf93e8e3 100644
--- a/test/ruby/enc/test_big5.rb
+++ b/test/ruby/enc/test_big5.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
class TestBig5 < Test::Unit::TestCase
diff --git a/test/ruby/enc/test_cp949.rb b/test/ruby/enc/test_cp949.rb
index e675c7b80c..0684162d5b 100644
--- a/test/ruby/enc/test_cp949.rb
+++ b/test/ruby/enc/test_cp949.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
class TestCP949 < Test::Unit::TestCase
diff --git a/test/ruby/enc/test_emoji.rb b/test/ruby/enc/test_emoji.rb
index 1f80c5a79e..330ff70cb9 100644
--- a/test/ruby/enc/test_emoji.rb
+++ b/test/ruby/enc/test_emoji.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
module Emoji
diff --git a/test/ruby/enc/test_euc_jp.rb b/test/ruby/enc/test_euc_jp.rb
index 510ee4611e..4aec69e4db 100644
--- a/test/ruby/enc/test_euc_jp.rb
+++ b/test/ruby/enc/test_euc_jp.rb
@@ -1,4 +1,5 @@
# vim: set fileencoding=euc-jp
+# frozen_string_literal: false
require "test/unit"
diff --git a/test/ruby/enc/test_euc_kr.rb b/test/ruby/enc/test_euc_kr.rb
index 5413fa6062..c9de2cc4e1 100644
--- a/test/ruby/enc/test_euc_kr.rb
+++ b/test/ruby/enc/test_euc_kr.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
class TestEucKr < Test::Unit::TestCase
diff --git a/test/ruby/enc/test_euc_tw.rb b/test/ruby/enc/test_euc_tw.rb
index f36d86b088..649b1b81c6 100644
--- a/test/ruby/enc/test_euc_tw.rb
+++ b/test/ruby/enc/test_euc_tw.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
class TestEucTw < Test::Unit::TestCase
diff --git a/test/ruby/enc/test_gb18030.rb b/test/ruby/enc/test_gb18030.rb
index f379504d48..76ac785951 100644
--- a/test/ruby/enc/test_gb18030.rb
+++ b/test/ruby/enc/test_gb18030.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
class TestGB18030 < Test::Unit::TestCase
diff --git a/test/ruby/enc/test_gbk.rb b/test/ruby/enc/test_gbk.rb
index d6dc5d6d1b..2e541b5821 100644
--- a/test/ruby/enc/test_gbk.rb
+++ b/test/ruby/enc/test_gbk.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
class TestGBK < Test::Unit::TestCase
diff --git a/test/ruby/enc/test_iso_8859.rb b/test/ruby/enc/test_iso_8859.rb
index 64cc7cd76d..f6b3b3f28b 100644
--- a/test/ruby/enc/test_iso_8859.rb
+++ b/test/ruby/enc/test_iso_8859.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestISO8859 < Test::Unit::TestCase
diff --git a/test/ruby/enc/test_koi8.rb b/test/ruby/enc/test_koi8.rb
index ce2d8925ea..4a4d233e8d 100644
--- a/test/ruby/enc/test_koi8.rb
+++ b/test/ruby/enc/test_koi8.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
class TestKOI8 < Test::Unit::TestCase
diff --git a/test/ruby/enc/test_shift_jis.rb b/test/ruby/enc/test_shift_jis.rb
index 1bd47fa859..059992d167 100644
--- a/test/ruby/enc/test_shift_jis.rb
+++ b/test/ruby/enc/test_shift_jis.rb
@@ -1,4 +1,5 @@
# vim: set fileencoding=shift_jis
+# frozen_string_literal: false
require "test/unit"
diff --git a/test/ruby/enc/test_utf16.rb b/test/ruby/enc/test_utf16.rb
index 63929c6f4b..99b48c2982 100644
--- a/test/ruby/enc/test_utf16.rb
+++ b/test/ruby/enc/test_utf16.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestUTF16 < Test::Unit::TestCase
diff --git a/test/ruby/enc/test_utf32.rb b/test/ruby/enc/test_utf32.rb
index 29a2240598..23e8aeb315 100644
--- a/test/ruby/enc/test_utf32.rb
+++ b/test/ruby/enc/test_utf32.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestUTF32 < Test::Unit::TestCase
diff --git a/test/ruby/enc/test_windows_1251.rb b/test/ruby/enc/test_windows_1251.rb
index 6fbf3159a1..002dbaa3cc 100644
--- a/test/ruby/enc/test_windows_1251.rb
+++ b/test/ruby/enc/test_windows_1251.rb
@@ -1,4 +1,5 @@
# encoding:windows-1251
+# frozen_string_literal: false
require "test/unit"
diff --git a/test/ruby/enc/test_windows_1252.rb b/test/ruby/enc/test_windows_1252.rb
index 72ee3d201a..f264cba759 100644
--- a/test/ruby/enc/test_windows_1252.rb
+++ b/test/ruby/enc/test_windows_1252.rb
@@ -1,4 +1,5 @@
# encoding:windows-1252
+# frozen_string_literal: false
require "test/unit"
diff --git a/test/ruby/lbtest.rb b/test/ruby/lbtest.rb
index ae047fb187..591656af77 100644
--- a/test/ruby/lbtest.rb
+++ b/test/ruby/lbtest.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'thread'
class LocalBarrier
diff --git a/test/ruby/marshaltestlib.rb b/test/ruby/marshaltestlib.rb
index 665d365a9a..358d3c5133 100644
--- a/test/ruby/marshaltestlib.rb
+++ b/test/ruby/marshaltestlib.rb
@@ -1,4 +1,5 @@
# coding: utf-8
+# frozen_string_literal: false
module MarshalTestLib
# include this module to a Test::Unit::TestCase and define encode(o) and
# decode(s) methods. e.g.
diff --git a/test/ruby/sentence.rb b/test/ruby/sentence.rb
index 50f42d6885..28fb5d1cf8 100644
--- a/test/ruby/sentence.rb
+++ b/test/ruby/sentence.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
# == sentence library
#
# = Features
diff --git a/test/ruby/test_alias.rb b/test/ruby/test_alias.rb
index 802c196355..d5bbce3dda 100644
--- a/test/ruby/test_alias.rb
+++ b/test/ruby/test_alias.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestAlias < Test::Unit::TestCase
diff --git a/test/ruby/test_argf.rb b/test/ruby/test_argf.rb
index e40b038967..d4be87e954 100644
--- a/test/ruby/test_argf.rb
+++ b/test/ruby/test_argf.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'timeout'
require 'tmpdir'
diff --git a/test/ruby/test_arity.rb b/test/ruby/test_arity.rb
index 4a24bdc660..b98248f603 100644
--- a/test/ruby/test_arity.rb
+++ b/test/ruby/test_arity.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestArity < Test::Unit::TestCase
diff --git a/test/ruby/test_array.rb b/test/ruby/test_array.rb
index d2af339a11..b1fc473f86 100644
--- a/test/ruby/test_array.rb
+++ b/test/ruby/test_array.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require 'test/unit'
class TestArray < Test::Unit::TestCase
diff --git a/test/ruby/test_assignment.rb b/test/ruby/test_assignment.rb
index 315f7baef6..d0f2fadeaa 100644
--- a/test/ruby/test_assignment.rb
+++ b/test/ruby/test_assignment.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestAssignment < Test::Unit::TestCase
diff --git a/test/ruby/test_autoload.rb b/test/ruby/test_autoload.rb
index a672e0be5a..b793fd2a7f 100644
--- a/test/ruby/test_autoload.rb
+++ b/test/ruby/test_autoload.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'tempfile'
require 'thread'
diff --git a/test/ruby/test_backtrace.rb b/test/ruby/test_backtrace.rb
index 3076f37017..ff95a89e67 100644
--- a/test/ruby/test_backtrace.rb
+++ b/test/ruby/test_backtrace.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'thread'
require 'tempfile'
diff --git a/test/ruby/test_basicinstructions.rb b/test/ruby/test_basicinstructions.rb
index 4a1dc9ce12..b56b6d116d 100644
--- a/test/ruby/test_basicinstructions.rb
+++ b/test/ruby/test_basicinstructions.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
ConstTest = 3
diff --git a/test/ruby/test_beginendblock.rb b/test/ruby/test_beginendblock.rb
index 9445fa6f95..0c88e9eb23 100644
--- a/test/ruby/test_beginendblock.rb
+++ b/test/ruby/test_beginendblock.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestBeginEndBlock < Test::Unit::TestCase
diff --git a/test/ruby/test_bignum.rb b/test/ruby/test_bignum.rb
index d057e39dbd..93afbe44af 100644
--- a/test/ruby/test_bignum.rb
+++ b/test/ruby/test_bignum.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestBignum < Test::Unit::TestCase
diff --git a/test/ruby/test_call.rb b/test/ruby/test_call.rb
index 04966f40f7..7ef8d06936 100644
--- a/test/ruby/test_call.rb
+++ b/test/ruby/test_call.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestCall < Test::Unit::TestCase
diff --git a/test/ruby/test_case.rb b/test/ruby/test_case.rb
index b9f8ab264d..861fd8ea06 100644
--- a/test/ruby/test_case.rb
+++ b/test/ruby/test_case.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestCase < Test::Unit::TestCase
diff --git a/test/ruby/test_class.rb b/test/ruby/test_class.rb
index 1d9ee55d7a..e60db37c15 100644
--- a/test/ruby/test_class.rb
+++ b/test/ruby/test_class.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestClass < Test::Unit::TestCase
diff --git a/test/ruby/test_clone.rb b/test/ruby/test_clone.rb
index c5e2469d10..93ef438461 100644
--- a/test/ruby/test_clone.rb
+++ b/test/ruby/test_clone.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestClone < Test::Unit::TestCase
diff --git a/test/ruby/test_comparable.rb b/test/ruby/test_comparable.rb
index dab6be5b27..7624ef2bd3 100644
--- a/test/ruby/test_comparable.rb
+++ b/test/ruby/test_comparable.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestComparable < Test::Unit::TestCase
diff --git a/test/ruby/test_complex.rb b/test/ruby/test_complex.rb
index de3bb05d6c..e51dec01cf 100644
--- a/test/ruby/test_complex.rb
+++ b/test/ruby/test_complex.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class ComplexSub < Complex; end
diff --git a/test/ruby/test_complex2.rb b/test/ruby/test_complex2.rb
index 3ee7810dc6..594fc3f45a 100644
--- a/test/ruby/test_complex2.rb
+++ b/test/ruby/test_complex2.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class Complex_Test2 < Test::Unit::TestCase
diff --git a/test/ruby/test_complexrational.rb b/test/ruby/test_complexrational.rb
index cef4074afa..7c80e1a295 100644
--- a/test/ruby/test_complexrational.rb
+++ b/test/ruby/test_complexrational.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class ComplexRational_Test < Test::Unit::TestCase
diff --git a/test/ruby/test_condition.rb b/test/ruby/test_condition.rb
index ba2e0688f3..ab0ffc4b6a 100644
--- a/test/ruby/test_condition.rb
+++ b/test/ruby/test_condition.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestCondition < Test::Unit::TestCase
diff --git a/test/ruby/test_const.rb b/test/ruby/test_const.rb
index 8d50464988..0b2c4497c6 100644
--- a/test/ruby/test_const.rb
+++ b/test/ruby/test_const.rb
@@ -1,4 +1,5 @@
# -*- coding: us-ascii -*-
+# frozen_string_literal: false
require 'test/unit'
class TestConst < Test::Unit::TestCase
diff --git a/test/ruby/test_continuation.rb b/test/ruby/test_continuation.rb
index 8d57b8bc25..efc549b67a 100644
--- a/test/ruby/test_continuation.rb
+++ b/test/ruby/test_continuation.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
EnvUtil.suppress_warning {require 'continuation'}
require 'fiber'
diff --git a/test/ruby/test_defined.rb b/test/ruby/test_defined.rb
index 95a46ed984..de7ba9cc14 100644
--- a/test/ruby/test_defined.rb
+++ b/test/ruby/test_defined.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestDefined < Test::Unit::TestCase
diff --git a/test/ruby/test_dir.rb b/test/ruby/test_dir.rb
index 510cbf3104..0cc5a6aa9b 100644
--- a/test/ruby/test_dir.rb
+++ b/test/ruby/test_dir.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'tmpdir'
diff --git a/test/ruby/test_dir_m17n.rb b/test/ruby/test_dir_m17n.rb
index bb60b0af76..febfbc0511 100644
--- a/test/ruby/test_dir_m17n.rb
+++ b/test/ruby/test_dir_m17n.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'tmpdir'
diff --git a/test/ruby/test_econv.rb b/test/ruby/test_econv.rb
index 5690ec75f2..8172bf99ef 100644
--- a/test/ruby/test_econv.rb
+++ b/test/ruby/test_econv.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestEncodingConverter < Test::Unit::TestCase
diff --git a/test/ruby/test_encoding.rb b/test/ruby/test_encoding.rb
index abe4317ff6..06559651c5 100644
--- a/test/ruby/test_encoding.rb
+++ b/test/ruby/test_encoding.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestEncoding < Test::Unit::TestCase
diff --git a/test/ruby/test_enum.rb b/test/ruby/test_enum.rb
index 4a6aa5e36e..ab3564491a 100644
--- a/test/ruby/test_enum.rb
+++ b/test/ruby/test_enum.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
EnvUtil.suppress_warning {require 'continuation'}
require 'stringio'
diff --git a/test/ruby/test_enumerator.rb b/test/ruby/test_enumerator.rb
index e81d2e4e72..aa36187ba2 100644
--- a/test/ruby/test_enumerator.rb
+++ b/test/ruby/test_enumerator.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestEnumerator < Test::Unit::TestCase
diff --git a/test/ruby/test_env.rb b/test/ruby/test_env.rb
index f7c6e61de5..c1617cce7e 100644
--- a/test/ruby/test_env.rb
+++ b/test/ruby/test_env.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestEnv < Test::Unit::TestCase
diff --git a/test/ruby/test_eval.rb b/test/ruby/test_eval.rb
index 02dbb9b379..6982429b51 100644
--- a/test/ruby/test_eval.rb
+++ b/test/ruby/test_eval.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestEval < Test::Unit::TestCase
diff --git a/test/ruby/test_exception.rb b/test/ruby/test_exception.rb
index 707a99f805..1148277a1b 100644
--- a/test/ruby/test_exception.rb
+++ b/test/ruby/test_exception.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'tempfile'
diff --git a/test/ruby/test_extlibs.rb b/test/ruby/test_extlibs.rb
index 995baa0d32..4d14ed45a8 100644
--- a/test/ruby/test_extlibs.rb
+++ b/test/ruby/test_extlibs.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "envutil"
require "shellwords"
diff --git a/test/ruby/test_fiber.rb b/test/ruby/test_fiber.rb
index 4684a65a03..fed5d3d2c6 100644
--- a/test/ruby/test_fiber.rb
+++ b/test/ruby/test_fiber.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'fiber'
EnvUtil.suppress_warning {require 'continuation'}
diff --git a/test/ruby/test_file.rb b/test/ruby/test_file.rb
index 3599d168d1..88b934d8ef 100644
--- a/test/ruby/test_file.rb
+++ b/test/ruby/test_file.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'tempfile'
require "thread"
diff --git a/test/ruby/test_file_exhaustive.rb b/test/ruby/test_file_exhaustive.rb
index e4b92152e5..8070d57bd0 100644
--- a/test/ruby/test_file_exhaustive.rb
+++ b/test/ruby/test_file_exhaustive.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "fileutils"
require "tmpdir"
diff --git a/test/ruby/test_fixnum.rb b/test/ruby/test_fixnum.rb
index e10371d3e3..b5b642504f 100644
--- a/test/ruby/test_fixnum.rb
+++ b/test/ruby/test_fixnum.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestFixnum < Test::Unit::TestCase
diff --git a/test/ruby/test_flip.rb b/test/ruby/test_flip.rb
index 84f7bf0562..594c8101b9 100644
--- a/test/ruby/test_flip.rb
+++ b/test/ruby/test_flip.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestFlip < Test::Unit::TestCase
diff --git a/test/ruby/test_float.rb b/test/ruby/test_float.rb
index f1e01fc249..3afd26d0b4 100644
--- a/test/ruby/test_float.rb
+++ b/test/ruby/test_float.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestFloat < Test::Unit::TestCase
diff --git a/test/ruby/test_fnmatch.rb b/test/ruby/test_fnmatch.rb
index a0eab545e4..ca01a28698 100644
--- a/test/ruby/test_fnmatch.rb
+++ b/test/ruby/test_fnmatch.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestFnmatch < Test::Unit::TestCase
diff --git a/test/ruby/test_gc.rb b/test/ruby/test_gc.rb
index f7ee182e83..0e3ae4bc42 100644
--- a/test/ruby/test_gc.rb
+++ b/test/ruby/test_gc.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestGc < Test::Unit::TestCase
diff --git a/test/ruby/test_hash.rb b/test/ruby/test_hash.rb
index 01990618fb..6ee029722a 100644
--- a/test/ruby/test_hash.rb
+++ b/test/ruby/test_hash.rb
@@ -1,4 +1,5 @@
# -*- coding: us-ascii -*-
+# frozen_string_literal: false
require 'test/unit'
EnvUtil.suppress_warning {require 'continuation'}
diff --git a/test/ruby/test_ifunless.rb b/test/ruby/test_ifunless.rb
index e144ff8efd..d533e155bc 100644
--- a/test/ruby/test_ifunless.rb
+++ b/test/ruby/test_ifunless.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestIfunless < Test::Unit::TestCase
diff --git a/test/ruby/test_integer.rb b/test/ruby/test_integer.rb
index 3dbf365a7c..64b8e1e2c1 100644
--- a/test/ruby/test_integer.rb
+++ b/test/ruby/test_integer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestInteger < Test::Unit::TestCase
diff --git a/test/ruby/test_integer_comb.rb b/test/ruby/test_integer_comb.rb
index 9018518334..c96b34a477 100644
--- a/test/ruby/test_integer_comb.rb
+++ b/test/ruby/test_integer_comb.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestIntegerComb < Test::Unit::TestCase
diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index bd92634785..bb6503a2db 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require 'test/unit'
require 'tmpdir'
require "fcntl"
diff --git a/test/ruby/test_io_m17n.rb b/test/ruby/test_io_m17n.rb
index ed8ac99946..233b93d0b3 100644
--- a/test/ruby/test_io_m17n.rb
+++ b/test/ruby/test_io_m17n.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require 'test/unit'
require 'tmpdir'
require 'tempfile'
diff --git a/test/ruby/test_iterator.rb b/test/ruby/test_iterator.rb
index 34652db2bb..fb81820ebf 100644
--- a/test/ruby/test_iterator.rb
+++ b/test/ruby/test_iterator.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class Array
diff --git a/test/ruby/test_keyword.rb b/test/ruby/test_keyword.rb
index 9c76e15c38..f6923248ff 100644
--- a/test/ruby/test_keyword.rb
+++ b/test/ruby/test_keyword.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestKeywordArguments < Test::Unit::TestCase
diff --git a/test/ruby/test_lambda.rb b/test/ruby/test_lambda.rb
index b2b4c9c907..f61e8a9f62 100644
--- a/test/ruby/test_lambda.rb
+++ b/test/ruby/test_lambda.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestLambdaParameters < Test::Unit::TestCase
diff --git a/test/ruby/test_lazy_enumerator.rb b/test/ruby/test_lazy_enumerator.rb
index a0c5068710..29c6b3e855 100644
--- a/test/ruby/test_lazy_enumerator.rb
+++ b/test/ruby/test_lazy_enumerator.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestLazyEnumerator < Test::Unit::TestCase
diff --git a/test/ruby/test_literal.rb b/test/ruby/test_literal.rb
index e523f11cd7..522ca53ea4 100644
--- a/test/ruby/test_literal.rb
+++ b/test/ruby/test_literal.rb
@@ -1,4 +1,5 @@
# -*- coding: us-ascii -*-
+# frozen_string_literal: false
require 'test/unit'
class TestRubyLiteral < Test::Unit::TestCase
diff --git a/test/ruby/test_m17n.rb b/test/ruby/test_m17n.rb
index a9cb86a5c8..74b847a825 100644
--- a/test/ruby/test_m17n.rb
+++ b/test/ruby/test_m17n.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require 'test/unit'
class TestM17N < Test::Unit::TestCase
diff --git a/test/ruby/test_m17n_comb.rb b/test/ruby/test_m17n_comb.rb
index cf00e52157..054287e2b5 100644
--- a/test/ruby/test_m17n_comb.rb
+++ b/test/ruby/test_m17n_comb.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'etc'
require_relative 'allpairs'
diff --git a/test/ruby/test_marshal.rb b/test/ruby/test_marshal.rb
index 145244ec10..482637fa12 100644
--- a/test/ruby/test_marshal.rb
+++ b/test/ruby/test_marshal.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'tempfile'
require_relative 'marshaltestlib'
diff --git a/test/ruby/test_math.rb b/test/ruby/test_math.rb
index 674bb541e5..f2805a2d74 100644
--- a/test/ruby/test_math.rb
+++ b/test/ruby/test_math.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestMath < Test::Unit::TestCase
diff --git a/test/ruby/test_metaclass.rb b/test/ruby/test_metaclass.rb
index 6386a02dfa..8c1990a78c 100644
--- a/test/ruby/test_metaclass.rb
+++ b/test/ruby/test_metaclass.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestMetaclass < Test::Unit::TestCase
diff --git a/test/ruby/test_method.rb b/test/ruby/test_method.rb
index 48178c4d7a..cc2c9873c5 100644
--- a/test/ruby/test_method.rb
+++ b/test/ruby/test_method.rb
@@ -1,4 +1,5 @@
# -*- coding: us-ascii -*-
+# frozen_string_literal: false
require 'test/unit'
class TestMethod < Test::Unit::TestCase
diff --git a/test/ruby/test_mixed_unicode_escapes.rb b/test/ruby/test_mixed_unicode_escapes.rb
index ac712db0f8..09240d8ab2 100644
--- a/test/ruby/test_mixed_unicode_escapes.rb
+++ b/test/ruby/test_mixed_unicode_escapes.rb
@@ -1,4 +1,5 @@
# -*- coding: cp932 -*-
+# frozen_string_literal: false
# This test is in a different file than TestUnicodeEscapes
# So that we can have a different coding comment above
diff --git a/test/ruby/test_module.rb b/test/ruby/test_module.rb
index b86efd7005..5356983135 100644
--- a/test/ruby/test_module.rb
+++ b/test/ruby/test_module.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'pp'
diff --git a/test/ruby/test_not.rb b/test/ruby/test_not.rb
index 486075bf83..721f868a5a 100644
--- a/test/ruby/test_not.rb
+++ b/test/ruby/test_not.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestIfunless < Test::Unit::TestCase
diff --git a/test/ruby/test_notimp.rb b/test/ruby/test_notimp.rb
index 9721723b29..a9ab8f328f 100644
--- a/test/ruby/test_notimp.rb
+++ b/test/ruby/test_notimp.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'timeout'
require 'tmpdir'
diff --git a/test/ruby/test_numeric.rb b/test/ruby/test_numeric.rb
index f539ccf731..ad5e283152 100644
--- a/test/ruby/test_numeric.rb
+++ b/test/ruby/test_numeric.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestNumeric < Test::Unit::TestCase
diff --git a/test/ruby/test_object.rb b/test/ruby/test_object.rb
index 29ce7ac76d..0ab134170d 100644
--- a/test/ruby/test_object.rb
+++ b/test/ruby/test_object.rb
@@ -1,4 +1,5 @@
# -*- coding: us-ascii -*-
+# frozen_string_literal: false
require 'test/unit'
class TestObject < Test::Unit::TestCase
diff --git a/test/ruby/test_objectspace.rb b/test/ruby/test_objectspace.rb
index cb17d03417..b701e0fc91 100644
--- a/test/ruby/test_objectspace.rb
+++ b/test/ruby/test_objectspace.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestObjectSpace < Test::Unit::TestCase
diff --git a/test/ruby/test_optimization.rb b/test/ruby/test_optimization.rb
index 3573d1267f..2115fc849d 100644
--- a/test/ruby/test_optimization.rb
+++ b/test/ruby/test_optimization.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'objspace'
diff --git a/test/ruby/test_pack.rb b/test/ruby/test_pack.rb
index d696dd70a1..2d7c0ae8e6 100644
--- a/test/ruby/test_pack.rb
+++ b/test/ruby/test_pack.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require 'test/unit'
class TestPack < Test::Unit::TestCase
diff --git a/test/ruby/test_parse.rb b/test/ruby/test_parse.rb
index 673b0e7b74..6560618b11 100644
--- a/test/ruby/test_parse.rb
+++ b/test/ruby/test_parse.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require 'test/unit'
require 'stringio'
diff --git a/test/ruby/test_path.rb b/test/ruby/test_path.rb
index b604a763f1..6af4fb6ac0 100644
--- a/test/ruby/test_path.rb
+++ b/test/ruby/test_path.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestPath < Test::Unit::TestCase
diff --git a/test/ruby/test_pipe.rb b/test/ruby/test_pipe.rb
index bcea91bebb..efca8f28c1 100644
--- a/test/ruby/test_pipe.rb
+++ b/test/ruby/test_pipe.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require_relative 'ut_eof'
diff --git a/test/ruby/test_primitive.rb b/test/ruby/test_primitive.rb
index 9d451e2ae0..d1503a562b 100644
--- a/test/ruby/test_primitive.rb
+++ b/test/ruby/test_primitive.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestRubyPrimitive < Test::Unit::TestCase
diff --git a/test/ruby/test_proc.rb b/test/ruby/test_proc.rb
index e13bf59598..fa247f2fc0 100644
--- a/test/ruby/test_proc.rb
+++ b/test/ruby/test_proc.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestProc < Test::Unit::TestCase
diff --git a/test/ruby/test_process.rb b/test/ruby/test_process.rb
index 2e120ef9bb..ca35d151a9 100644
--- a/test/ruby/test_process.rb
+++ b/test/ruby/test_process.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'tempfile'
require 'timeout'
diff --git a/test/ruby/test_rand.rb b/test/ruby/test_rand.rb
index 4da1559e40..d4258a7f1c 100644
--- a/test/ruby/test_rand.rb
+++ b/test/ruby/test_rand.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestRand < Test::Unit::TestCase
diff --git a/test/ruby/test_range.rb b/test/ruby/test_range.rb
index a91f80b076..046f69e9de 100644
--- a/test/ruby/test_range.rb
+++ b/test/ruby/test_range.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'delegate'
require 'timeout'
diff --git a/test/ruby/test_rational.rb b/test/ruby/test_rational.rb
index f922d89533..ea51ca29f0 100644
--- a/test/ruby/test_rational.rb
+++ b/test/ruby/test_rational.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class RationalSub < Rational; end
diff --git a/test/ruby/test_rational2.rb b/test/ruby/test_rational2.rb
index 3b6a985bc6..4e96bf621c 100644
--- a/test/ruby/test_rational2.rb
+++ b/test/ruby/test_rational2.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class Rational_Test2 < Test::Unit::TestCase
diff --git a/test/ruby/test_readpartial.rb b/test/ruby/test_readpartial.rb
index bc84da7d12..bc22556cd4 100644
--- a/test/ruby/test_readpartial.rb
+++ b/test/ruby/test_readpartial.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'timeout'
require 'fcntl'
diff --git a/test/ruby/test_refinement.rb b/test/ruby/test_refinement.rb
index 52b7ac7086..99987da988 100644
--- a/test/ruby/test_refinement.rb
+++ b/test/ruby/test_refinement.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestRefinement < Test::Unit::TestCase
diff --git a/test/ruby/test_regexp.rb b/test/ruby/test_regexp.rb
index 8e01c05597..ef75d4d413 100644
--- a/test/ruby/test_regexp.rb
+++ b/test/ruby/test_regexp.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require 'test/unit'
class TestRegexp < Test::Unit::TestCase
diff --git a/test/ruby/test_require.rb b/test/ruby/test_require.rb
index 9123d5bc8f..a7db8b93e0 100644
--- a/test/ruby/test_require.rb
+++ b/test/ruby/test_require.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'tempfile'
diff --git a/test/ruby/test_rubyvm.rb b/test/ruby/test_rubyvm.rb
index 580f3be2e1..c2d334d04c 100644
--- a/test/ruby/test_rubyvm.rb
+++ b/test/ruby/test_rubyvm.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestRubyVM < Test::Unit::TestCase
diff --git a/test/ruby/test_settracefunc.rb b/test/ruby/test_settracefunc.rb
index e5048adba1..fc1391e60f 100644
--- a/test/ruby/test_settracefunc.rb
+++ b/test/ruby/test_settracefunc.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestSetTraceFunc < Test::Unit::TestCase
diff --git a/test/ruby/test_signal.rb b/test/ruby/test_signal.rb
index 781045d30a..13d52013b0 100644
--- a/test/ruby/test_signal.rb
+++ b/test/ruby/test_signal.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'timeout'
require 'tempfile'
diff --git a/test/ruby/test_sleep.rb b/test/ruby/test_sleep.rb
index 29490a7a18..61002b8b18 100644
--- a/test/ruby/test_sleep.rb
+++ b/test/ruby/test_sleep.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'etc'
diff --git a/test/ruby/test_sprintf.rb b/test/ruby/test_sprintf.rb
index f400e2be6e..1d3badddf9 100644
--- a/test/ruby/test_sprintf.rb
+++ b/test/ruby/test_sprintf.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestSprintf < Test::Unit::TestCase
diff --git a/test/ruby/test_sprintf_comb.rb b/test/ruby/test_sprintf_comb.rb
index c58ddf4f15..4113113030 100644
--- a/test/ruby/test_sprintf_comb.rb
+++ b/test/ruby/test_sprintf_comb.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require_relative 'allpairs'
diff --git a/test/ruby/test_string.rb b/test/ruby/test_string.rb
index eed7c69a02..47bd0d56af 100644
--- a/test/ruby/test_string.rb
+++ b/test/ruby/test_string.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestString < Test::Unit::TestCase
diff --git a/test/ruby/test_stringchar.rb b/test/ruby/test_stringchar.rb
index 7f7342c9ab..e13beef69c 100644
--- a/test/ruby/test_stringchar.rb
+++ b/test/ruby/test_stringchar.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestStringchar < Test::Unit::TestCase
diff --git a/test/ruby/test_struct.rb b/test/ruby/test_struct.rb
index 19a66fb9b1..38632a1981 100644
--- a/test/ruby/test_struct.rb
+++ b/test/ruby/test_struct.rb
@@ -1,4 +1,5 @@
# -*- coding: us-ascii -*-
+# frozen_string_literal: false
require 'test/unit'
require 'timeout'
diff --git a/test/ruby/test_super.rb b/test/ruby/test_super.rb
index 4f439a6e72..06e3e6e3b5 100644
--- a/test/ruby/test_super.rb
+++ b/test/ruby/test_super.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestSuper < Test::Unit::TestCase
diff --git a/test/ruby/test_symbol.rb b/test/ruby/test_symbol.rb
index a7ffe7b8b9..0e8417c5ed 100644
--- a/test/ruby/test_symbol.rb
+++ b/test/ruby/test_symbol.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestSymbol < Test::Unit::TestCase
diff --git a/test/ruby/test_syntax.rb b/test/ruby/test_syntax.rb
index dfe5859247..77cb3ea54e 100644
--- a/test/ruby/test_syntax.rb
+++ b/test/ruby/test_syntax.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestSyntax < Test::Unit::TestCase
diff --git a/test/ruby/test_system.rb b/test/ruby/test_system.rb
index b328cbcc1d..60037ab044 100644
--- a/test/ruby/test_system.rb
+++ b/test/ruby/test_system.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'tmpdir'
diff --git a/test/ruby/test_thread.rb b/test/ruby/test_thread.rb
index e0c61c66f5..dc929ce4fd 100644
--- a/test/ruby/test_thread.rb
+++ b/test/ruby/test_thread.rb
@@ -1,4 +1,5 @@
# -*- coding: us-ascii -*-
+# frozen_string_literal: false
require 'test/unit'
require 'thread'
diff --git a/test/ruby/test_threadgroup.rb b/test/ruby/test_threadgroup.rb
index e158f5ada4..80b0c15338 100644
--- a/test/ruby/test_threadgroup.rb
+++ b/test/ruby/test_threadgroup.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'thread'
diff --git a/test/ruby/test_time.rb b/test/ruby/test_time.rb
index 97c6288f4d..232d3472c4 100644
--- a/test/ruby/test_time.rb
+++ b/test/ruby/test_time.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'delegate'
require 'timeout'
diff --git a/test/ruby/test_time_tz.rb b/test/ruby/test_time_tz.rb
index a73bd86f0b..f5d46905a0 100644
--- a/test/ruby/test_time_tz.rb
+++ b/test/ruby/test_time_tz.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestTimeTZ < Test::Unit::TestCase
diff --git a/test/ruby/test_trace.rb b/test/ruby/test_trace.rb
index 775c458fb1..77be94e9be 100644
--- a/test/ruby/test_trace.rb
+++ b/test/ruby/test_trace.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestTrace < Test::Unit::TestCase
diff --git a/test/ruby/test_transcode.rb b/test/ruby/test_transcode.rb
index fc74bd02f0..33e7467102 100644
--- a/test/ruby/test_transcode.rb
+++ b/test/ruby/test_transcode.rb
@@ -1,4 +1,5 @@
# encoding: ASCII-8BIT # make sure this runs in binary mode
+# frozen_string_literal: false
# some of the comments are in UTF-8
require 'test/unit'
diff --git a/test/ruby/test_undef.rb b/test/ruby/test_undef.rb
index e1c98076c0..6d513a238f 100644
--- a/test/ruby/test_undef.rb
+++ b/test/ruby/test_undef.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestUndef < Test::Unit::TestCase
diff --git a/test/ruby/test_unicode_escape.rb b/test/ruby/test_unicode_escape.rb
index 9d0d787e98..e0ca430a4a 100644
--- a/test/ruby/test_unicode_escape.rb
+++ b/test/ruby/test_unicode_escape.rb
@@ -1,4 +1,5 @@
# -*- coding: utf-8 -*-
+# frozen_string_literal: false
require 'test/unit'
diff --git a/test/ruby/test_variable.rb b/test/ruby/test_variable.rb
index 06a8e2f72b..667f9ee24f 100644
--- a/test/ruby/test_variable.rb
+++ b/test/ruby/test_variable.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestVariable < Test::Unit::TestCase
diff --git a/test/ruby/test_weakmap.rb b/test/ruby/test_weakmap.rb
index 1279944a37..15463bb030 100644
--- a/test/ruby/test_weakmap.rb
+++ b/test/ruby/test_weakmap.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestWeakMap < Test::Unit::TestCase
diff --git a/test/ruby/test_whileuntil.rb b/test/ruby/test_whileuntil.rb
index 3d8dbee994..394383a799 100644
--- a/test/ruby/test_whileuntil.rb
+++ b/test/ruby/test_whileuntil.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'tmpdir'
diff --git a/test/ruby/test_yield.rb b/test/ruby/test_yield.rb
index 5c98bb8850..0690d3cdf4 100644
--- a/test/ruby/test_yield.rb
+++ b/test/ruby/test_yield.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'stringio'
diff --git a/test/ruby/ut_eof.rb b/test/ruby/ut_eof.rb
index 83325f2efc..fcd7a63988 100644
--- a/test/ruby/ut_eof.rb
+++ b/test/ruby/ut_eof.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
module TestEOF
diff --git a/test/rubygems/bad_rake.rb b/test/rubygems/bad_rake.rb
index 379a4c986e..dc603fdec1 100644
--- a/test/rubygems/bad_rake.rb
+++ b/test/rubygems/bad_rake.rb
@@ -1 +1,2 @@
+# frozen_string_literal: false
exit 1
diff --git a/test/rubygems/bogussources.rb b/test/rubygems/bogussources.rb
index 008e3a1de5..f51ff60c37 100644
--- a/test/rubygems/bogussources.rb
+++ b/test/rubygems/bogussources.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
#--
# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
# All rights reserved.
diff --git a/test/rubygems/fake_certlib/openssl.rb b/test/rubygems/fake_certlib/openssl.rb
index 9de90c0a10..2b026df0d8 100644
--- a/test/rubygems/fake_certlib/openssl.rb
+++ b/test/rubygems/fake_certlib/openssl.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
#--
# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
# All rights reserved.
diff --git a/test/rubygems/fix_openssl_warnings.rb b/test/rubygems/fix_openssl_warnings.rb
index 66d6cdf3eb..e34551c8a9 100644
--- a/test/rubygems/fix_openssl_warnings.rb
+++ b/test/rubygems/fix_openssl_warnings.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
##
# HACK: this drives me BONKERS
diff --git a/test/rubygems/foo/discover.rb b/test/rubygems/foo/discover.rb
index e69de29bb2..1effd1c8b0 100644
--- a/test/rubygems/foo/discover.rb
+++ b/test/rubygems/foo/discover.rb
@@ -0,0 +1 @@
+# frozen_string_literal: false
diff --git a/test/rubygems/good_rake.rb b/test/rubygems/good_rake.rb
index ca916d098d..2d5c76c13a 100644
--- a/test/rubygems/good_rake.rb
+++ b/test/rubygems/good_rake.rb
@@ -1 +1,2 @@
+# frozen_string_literal: false
exit 0
diff --git a/test/rubygems/plugin/exception/rubygems_plugin.rb b/test/rubygems/plugin/exception/rubygems_plugin.rb
index 16c417e84d..1ab8c553e2 100644
--- a/test/rubygems/plugin/exception/rubygems_plugin.rb
+++ b/test/rubygems/plugin/exception/rubygems_plugin.rb
@@ -1,2 +1,3 @@
+# frozen_string_literal: false
TestGem::TEST_PLUGIN_EXCEPTION = :loaded
raise Exception.new('boom')
diff --git a/test/rubygems/plugin/load/rubygems_plugin.rb b/test/rubygems/plugin/load/rubygems_plugin.rb
index c7c72777aa..7336fd2b55 100644
--- a/test/rubygems/plugin/load/rubygems_plugin.rb
+++ b/test/rubygems/plugin/load/rubygems_plugin.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
class TestGem
TEST_PLUGIN_LOAD = :loaded
end
diff --git a/test/rubygems/plugin/standarderror/rubygems_plugin.rb b/test/rubygems/plugin/standarderror/rubygems_plugin.rb
index 4b577a6518..a0850bf98e 100644
--- a/test/rubygems/plugin/standarderror/rubygems_plugin.rb
+++ b/test/rubygems/plugin/standarderror/rubygems_plugin.rb
@@ -1,2 +1,3 @@
+# frozen_string_literal: false
TestGem::TEST_PLUGIN_STANDARDERROR = :loaded
raise StandardError.new('boom')
diff --git a/test/rubygems/rubygems/commands/crash_command.rb b/test/rubygems/rubygems/commands/crash_command.rb
index 624be9fd32..07692b4609 100644
--- a/test/rubygems/rubygems/commands/crash_command.rb
+++ b/test/rubygems/rubygems/commands/crash_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
class Gem::Commands::CrashCommand < Gem::Command
raise "crash"
diff --git a/test/rubygems/rubygems_plugin.rb b/test/rubygems/rubygems_plugin.rb
index 6c08f97c6d..80f78443b5 100644
--- a/test/rubygems/rubygems_plugin.rb
+++ b/test/rubygems/rubygems_plugin.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/command_manager'
##
diff --git a/test/rubygems/sff/discover.rb b/test/rubygems/sff/discover.rb
index e69de29bb2..1effd1c8b0 100644
--- a/test/rubygems/sff/discover.rb
+++ b/test/rubygems/sff/discover.rb
@@ -0,0 +1 @@
+# frozen_string_literal: false
diff --git a/test/rubygems/simple_gem.rb b/test/rubygems/simple_gem.rb
index c40002e230..a6af71eef4 100644
--- a/test/rubygems/simple_gem.rb
+++ b/test/rubygems/simple_gem.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
SIMPLE_GEM = <<-GEMDATA
MD5SUM = "989bf34a1cbecd52e0ea66b662b3a405"
if $0 == __FILE__
diff --git a/test/rubygems/test_bundled_ca.rb b/test/rubygems/test_bundled_ca.rb
index 9b2b978af1..0f8b6bd6a9 100644
--- a/test/rubygems/test_bundled_ca.rb
+++ b/test/rubygems/test_bundled_ca.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'net/https'
require 'rubygems/request'
diff --git a/test/rubygems/test_config.rb b/test/rubygems/test_config.rb
index fb6d05c986..207085b62d 100644
--- a/test/rubygems/test_config.rb
+++ b/test/rubygems/test_config.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems'
diff --git a/test/rubygems/test_deprecate.rb b/test/rubygems/test_deprecate.rb
index ed4e9aa5ff..a29b565859 100644
--- a/test/rubygems/test_deprecate.rb
+++ b/test/rubygems/test_deprecate.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
# require 'rubygems/builder'
# require 'rubygems/package'
diff --git a/test/rubygems/test_gem.rb b/test/rubygems/test_gem.rb
index 1bcff8c2ff..75ec9df06e 100644
--- a/test/rubygems/test_gem.rb
+++ b/test/rubygems/test_gem.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems'
require 'rubygems/command'
diff --git a/test/rubygems/test_gem_available_set.rb b/test/rubygems/test_gem_available_set.rb
index 8b01112c11..85551f0272 100644
--- a/test/rubygems/test_gem_available_set.rb
+++ b/test/rubygems/test_gem_available_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/available_set'
require 'rubygems/security'
diff --git a/test/rubygems/test_gem_command.rb b/test/rubygems/test_gem_command.rb
index 48cbc98d8c..5c1c0718ec 100644
--- a/test/rubygems/test_gem_command.rb
+++ b/test/rubygems/test_gem_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/command'
diff --git a/test/rubygems/test_gem_command_manager.rb b/test/rubygems/test_gem_command_manager.rb
index f6433c5cc3..fd25750c28 100644
--- a/test/rubygems/test_gem_command_manager.rb
+++ b/test/rubygems/test_gem_command_manager.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/command_manager'
diff --git a/test/rubygems/test_gem_commands_build_command.rb b/test/rubygems/test_gem_commands_build_command.rb
index 5f870c0765..1fb80e1dda 100644
--- a/test/rubygems/test_gem_commands_build_command.rb
+++ b/test/rubygems/test_gem_commands_build_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/build_command'
require 'rubygems/package'
diff --git a/test/rubygems/test_gem_commands_cert_command.rb b/test/rubygems/test_gem_commands_cert_command.rb
index 4c1dcc25c0..5179327211 100644
--- a/test/rubygems/test_gem_commands_cert_command.rb
+++ b/test/rubygems/test_gem_commands_cert_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/cert_command'
require 'rubygems/fix_openssl_warnings' if RUBY_VERSION < "1.9"
diff --git a/test/rubygems/test_gem_commands_check_command.rb b/test/rubygems/test_gem_commands_check_command.rb
index 67db6a3206..6b76349fbe 100644
--- a/test/rubygems/test_gem_commands_check_command.rb
+++ b/test/rubygems/test_gem_commands_check_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/check_command'
diff --git a/test/rubygems/test_gem_commands_cleanup_command.rb b/test/rubygems/test_gem_commands_cleanup_command.rb
index e8ad35fe8e..4a6dae8ae5 100644
--- a/test/rubygems/test_gem_commands_cleanup_command.rb
+++ b/test/rubygems/test_gem_commands_cleanup_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/cleanup_command'
require 'rubygems/installer'
diff --git a/test/rubygems/test_gem_commands_contents_command.rb b/test/rubygems/test_gem_commands_contents_command.rb
index ae8e49fdc3..ae02503524 100644
--- a/test/rubygems/test_gem_commands_contents_command.rb
+++ b/test/rubygems/test_gem_commands_contents_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/contents_command'
diff --git a/test/rubygems/test_gem_commands_dependency_command.rb b/test/rubygems/test_gem_commands_dependency_command.rb
index 1409162cec..058b9a893f 100644
--- a/test/rubygems/test_gem_commands_dependency_command.rb
+++ b/test/rubygems/test_gem_commands_dependency_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/dependency_command'
diff --git a/test/rubygems/test_gem_commands_environment_command.rb b/test/rubygems/test_gem_commands_environment_command.rb
index 81ff55d357..2def4175fe 100644
--- a/test/rubygems/test_gem_commands_environment_command.rb
+++ b/test/rubygems/test_gem_commands_environment_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/environment_command'
diff --git a/test/rubygems/test_gem_commands_fetch_command.rb b/test/rubygems/test_gem_commands_fetch_command.rb
index c452e79f14..4a57b93f50 100644
--- a/test/rubygems/test_gem_commands_fetch_command.rb
+++ b/test/rubygems/test_gem_commands_fetch_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/package'
require 'rubygems/security'
diff --git a/test/rubygems/test_gem_commands_generate_index_command.rb b/test/rubygems/test_gem_commands_generate_index_command.rb
index 2e478d9c9e..1c7213983e 100644
--- a/test/rubygems/test_gem_commands_generate_index_command.rb
+++ b/test/rubygems/test_gem_commands_generate_index_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/indexer'
require 'rubygems/commands/generate_index_command'
diff --git a/test/rubygems/test_gem_commands_help_command.rb b/test/rubygems/test_gem_commands_help_command.rb
index bed6095827..36512cb642 100644
--- a/test/rubygems/test_gem_commands_help_command.rb
+++ b/test/rubygems/test_gem_commands_help_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "rubygems"
require "rubygems/test_case"
require "rubygems/commands/help_command"
diff --git a/test/rubygems/test_gem_commands_install_command.rb b/test/rubygems/test_gem_commands_install_command.rb
index c12b17e613..b8ddc97d7d 100644
--- a/test/rubygems/test_gem_commands_install_command.rb
+++ b/test/rubygems/test_gem_commands_install_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/install_command'
require 'rubygems/request_set'
diff --git a/test/rubygems/test_gem_commands_list_command.rb b/test/rubygems/test_gem_commands_list_command.rb
index b03f166e1b..67e5980576 100644
--- a/test/rubygems/test_gem_commands_list_command.rb
+++ b/test/rubygems/test_gem_commands_list_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/list_command'
diff --git a/test/rubygems/test_gem_commands_lock_command.rb b/test/rubygems/test_gem_commands_lock_command.rb
index 8f30b7f2cc..ae85c4653f 100644
--- a/test/rubygems/test_gem_commands_lock_command.rb
+++ b/test/rubygems/test_gem_commands_lock_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/lock_command'
diff --git a/test/rubygems/test_gem_commands_mirror.rb b/test/rubygems/test_gem_commands_mirror.rb
index 3b01ab3645..c20ed3b4c8 100644
--- a/test/rubygems/test_gem_commands_mirror.rb
+++ b/test/rubygems/test_gem_commands_mirror.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/mirror_command'
diff --git a/test/rubygems/test_gem_commands_open_command.rb b/test/rubygems/test_gem_commands_open_command.rb
index c1c76f95c9..e342c2c60c 100644
--- a/test/rubygems/test_gem_commands_open_command.rb
+++ b/test/rubygems/test_gem_commands_open_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/open_command'
diff --git a/test/rubygems/test_gem_commands_outdated_command.rb b/test/rubygems/test_gem_commands_outdated_command.rb
index 1bc5acc1f4..ee48d070fb 100644
--- a/test/rubygems/test_gem_commands_outdated_command.rb
+++ b/test/rubygems/test_gem_commands_outdated_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/outdated_command'
diff --git a/test/rubygems/test_gem_commands_owner_command.rb b/test/rubygems/test_gem_commands_owner_command.rb
index 5d7b66137e..6d8275227f 100644
--- a/test/rubygems/test_gem_commands_owner_command.rb
+++ b/test/rubygems/test_gem_commands_owner_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/owner_command'
diff --git a/test/rubygems/test_gem_commands_pristine_command.rb b/test/rubygems/test_gem_commands_pristine_command.rb
index b12fba511d..1160c37b61 100644
--- a/test/rubygems/test_gem_commands_pristine_command.rb
+++ b/test/rubygems/test_gem_commands_pristine_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/pristine_command'
diff --git a/test/rubygems/test_gem_commands_push_command.rb b/test/rubygems/test_gem_commands_push_command.rb
index 7d3d2efb88..06967e0990 100644
--- a/test/rubygems/test_gem_commands_push_command.rb
+++ b/test/rubygems/test_gem_commands_push_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/push_command'
diff --git a/test/rubygems/test_gem_commands_query_command.rb b/test/rubygems/test_gem_commands_query_command.rb
index 50cedbb50e..da777312f0 100644
--- a/test/rubygems/test_gem_commands_query_command.rb
+++ b/test/rubygems/test_gem_commands_query_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/query_command'
diff --git a/test/rubygems/test_gem_commands_search_command.rb b/test/rubygems/test_gem_commands_search_command.rb
index fb8debc245..1bb3eb90f2 100644
--- a/test/rubygems/test_gem_commands_search_command.rb
+++ b/test/rubygems/test_gem_commands_search_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/search_command'
diff --git a/test/rubygems/test_gem_commands_server_command.rb b/test/rubygems/test_gem_commands_server_command.rb
index d0782f9a94..4186667061 100644
--- a/test/rubygems/test_gem_commands_server_command.rb
+++ b/test/rubygems/test_gem_commands_server_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/server_command'
diff --git a/test/rubygems/test_gem_commands_setup_command.rb b/test/rubygems/test_gem_commands_setup_command.rb
index 974c157a18..9748db79d5 100644
--- a/test/rubygems/test_gem_commands_setup_command.rb
+++ b/test/rubygems/test_gem_commands_setup_command.rb
@@ -1,4 +1,5 @@
# coding: UTF-8
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/setup_command'
diff --git a/test/rubygems/test_gem_commands_sources_command.rb b/test/rubygems/test_gem_commands_sources_command.rb
index 8ee0fd3cb7..f7af9d5962 100644
--- a/test/rubygems/test_gem_commands_sources_command.rb
+++ b/test/rubygems/test_gem_commands_sources_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/sources_command'
diff --git a/test/rubygems/test_gem_commands_specification_command.rb b/test/rubygems/test_gem_commands_specification_command.rb
index ccc2dbbae9..4759ba47c0 100644
--- a/test/rubygems/test_gem_commands_specification_command.rb
+++ b/test/rubygems/test_gem_commands_specification_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/specification_command'
diff --git a/test/rubygems/test_gem_commands_stale_command.rb b/test/rubygems/test_gem_commands_stale_command.rb
index 69b1e29e2d..c7b23574da 100644
--- a/test/rubygems/test_gem_commands_stale_command.rb
+++ b/test/rubygems/test_gem_commands_stale_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/stale_command'
diff --git a/test/rubygems/test_gem_commands_uninstall_command.rb b/test/rubygems/test_gem_commands_uninstall_command.rb
index 8e90325f1f..b001b7f2a8 100644
--- a/test/rubygems/test_gem_commands_uninstall_command.rb
+++ b/test/rubygems/test_gem_commands_uninstall_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/installer_test_case'
require 'rubygems/commands/uninstall_command'
diff --git a/test/rubygems/test_gem_commands_unpack_command.rb b/test/rubygems/test_gem_commands_unpack_command.rb
index 05002f8832..1420c8fa60 100644
--- a/test/rubygems/test_gem_commands_unpack_command.rb
+++ b/test/rubygems/test_gem_commands_unpack_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/unpack_command'
diff --git a/test/rubygems/test_gem_commands_update_command.rb b/test/rubygems/test_gem_commands_update_command.rb
index 03894d7590..a49cc3ace1 100644
--- a/test/rubygems/test_gem_commands_update_command.rb
+++ b/test/rubygems/test_gem_commands_update_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/update_command'
diff --git a/test/rubygems/test_gem_commands_which_command.rb b/test/rubygems/test_gem_commands_which_command.rb
index 5c6afe93d1..2549579c84 100644
--- a/test/rubygems/test_gem_commands_which_command.rb
+++ b/test/rubygems/test_gem_commands_which_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/which_command'
diff --git a/test/rubygems/test_gem_commands_yank_command.rb b/test/rubygems/test_gem_commands_yank_command.rb
index 469fd15bd9..49e8eda6e5 100644
--- a/test/rubygems/test_gem_commands_yank_command.rb
+++ b/test/rubygems/test_gem_commands_yank_command.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/commands/yank_command'
diff --git a/test/rubygems/test_gem_config_file.rb b/test/rubygems/test_gem_config_file.rb
index 3ababfbbfd..6ed240f306 100644
--- a/test/rubygems/test_gem_config_file.rb
+++ b/test/rubygems/test_gem_config_file.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/config_file'
diff --git a/test/rubygems/test_gem_dependency.rb b/test/rubygems/test_gem_dependency.rb
index 4c27ce7300..dcb722687b 100644
--- a/test/rubygems/test_gem_dependency.rb
+++ b/test/rubygems/test_gem_dependency.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/dependency'
diff --git a/test/rubygems/test_gem_dependency_installer.rb b/test/rubygems/test_gem_dependency_installer.rb
index 03bcd04bc0..dfa9494a49 100644
--- a/test/rubygems/test_gem_dependency_installer.rb
+++ b/test/rubygems/test_gem_dependency_installer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/dependency_installer'
require 'rubygems/security'
diff --git a/test/rubygems/test_gem_dependency_list.rb b/test/rubygems/test_gem_dependency_list.rb
index d25359e84b..8c63206f90 100644
--- a/test/rubygems/test_gem_dependency_list.rb
+++ b/test/rubygems/test_gem_dependency_list.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/dependency_list'
diff --git a/test/rubygems/test_gem_dependency_resolution_error.rb b/test/rubygems/test_gem_dependency_resolution_error.rb
index 0442082e6a..bae561c804 100644
--- a/test/rubygems/test_gem_dependency_resolution_error.rb
+++ b/test/rubygems/test_gem_dependency_resolution_error.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemDependencyResolutionError < Gem::TestCase
diff --git a/test/rubygems/test_gem_doctor.rb b/test/rubygems/test_gem_doctor.rb
index 1097528e18..5eb190377d 100644
--- a/test/rubygems/test_gem_doctor.rb
+++ b/test/rubygems/test_gem_doctor.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/doctor'
diff --git a/test/rubygems/test_gem_ext_builder.rb b/test/rubygems/test_gem_ext_builder.rb
index 02c7593628..e8cc5aa57c 100644
--- a/test/rubygems/test_gem_ext_builder.rb
+++ b/test/rubygems/test_gem_ext_builder.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/ext'
require 'rubygems/installer'
diff --git a/test/rubygems/test_gem_ext_cmake_builder.rb b/test/rubygems/test_gem_ext_cmake_builder.rb
index a36be476be..7a296ccfd5 100644
--- a/test/rubygems/test_gem_ext_cmake_builder.rb
+++ b/test/rubygems/test_gem_ext_cmake_builder.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/ext'
diff --git a/test/rubygems/test_gem_ext_configure_builder.rb b/test/rubygems/test_gem_ext_configure_builder.rb
index 610d60a920..6cbe8ba560 100644
--- a/test/rubygems/test_gem_ext_configure_builder.rb
+++ b/test/rubygems/test_gem_ext_configure_builder.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/ext'
diff --git a/test/rubygems/test_gem_ext_ext_conf_builder.rb b/test/rubygems/test_gem_ext_ext_conf_builder.rb
index 689734ac37..d71529b61b 100644
--- a/test/rubygems/test_gem_ext_ext_conf_builder.rb
+++ b/test/rubygems/test_gem_ext_ext_conf_builder.rb
@@ -1,4 +1,5 @@
# coding: UTF-8
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/ext'
diff --git a/test/rubygems/test_gem_ext_rake_builder.rb b/test/rubygems/test_gem_ext_rake_builder.rb
index 0f4789a68f..8eaa3f43c3 100644
--- a/test/rubygems/test_gem_ext_rake_builder.rb
+++ b/test/rubygems/test_gem_ext_rake_builder.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/ext'
diff --git a/test/rubygems/test_gem_gem_runner.rb b/test/rubygems/test_gem_gem_runner.rb
index 85ff725345..0ca66c9078 100644
--- a/test/rubygems/test_gem_gem_runner.rb
+++ b/test/rubygems/test_gem_gem_runner.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/gem_runner'
diff --git a/test/rubygems/test_gem_gemcutter_utilities.rb b/test/rubygems/test_gem_gemcutter_utilities.rb
index c117c8f826..79be8b0477 100644
--- a/test/rubygems/test_gem_gemcutter_utilities.rb
+++ b/test/rubygems/test_gem_gemcutter_utilities.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems'
require 'rubygems/command'
diff --git a/test/rubygems/test_gem_impossible_dependencies_error.rb b/test/rubygems/test_gem_impossible_dependencies_error.rb
index 9c9825ca9a..6a6c9c04cf 100644
--- a/test/rubygems/test_gem_impossible_dependencies_error.rb
+++ b/test/rubygems/test_gem_impossible_dependencies_error.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemImpossibleDependenciesError < Gem::TestCase
diff --git a/test/rubygems/test_gem_indexer.rb b/test/rubygems/test_gem_indexer.rb
index 9622cd1abb..1f255ff715 100644
--- a/test/rubygems/test_gem_indexer.rb
+++ b/test/rubygems/test_gem_indexer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/indexer'
diff --git a/test/rubygems/test_gem_install_update_options.rb b/test/rubygems/test_gem_install_update_options.rb
index e7dc52a63c..d81fa86e9c 100644
--- a/test/rubygems/test_gem_install_update_options.rb
+++ b/test/rubygems/test_gem_install_update_options.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/installer_test_case'
require 'rubygems/install_update_options'
require 'rubygems/command'
diff --git a/test/rubygems/test_gem_installer.rb b/test/rubygems/test_gem_installer.rb
index 2e5ac6ab76..129c235abb 100644
--- a/test/rubygems/test_gem_installer.rb
+++ b/test/rubygems/test_gem_installer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/installer_test_case'
class TestGemInstaller < Gem::InstallerTestCase
diff --git a/test/rubygems/test_gem_local_remote_options.rb b/test/rubygems/test_gem_local_remote_options.rb
index 1a0338bfe1..4e02e2adeb 100644
--- a/test/rubygems/test_gem_local_remote_options.rb
+++ b/test/rubygems/test_gem_local_remote_options.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/local_remote_options'
require 'rubygems/command'
diff --git a/test/rubygems/test_gem_name_tuple.rb b/test/rubygems/test_gem_name_tuple.rb
index 38320f7590..250a167994 100644
--- a/test/rubygems/test_gem_name_tuple.rb
+++ b/test/rubygems/test_gem_name_tuple.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/name_tuple'
diff --git a/test/rubygems/test_gem_package.rb b/test/rubygems/test_gem_package.rb
index bbb036d849..7848bc2428 100644
--- a/test/rubygems/test_gem_package.rb
+++ b/test/rubygems/test_gem_package.rb
@@ -1,4 +1,5 @@
# coding: UTF-8
+# frozen_string_literal: false
require 'rubygems/package/tar_test_case'
require 'rubygems/simple_gem'
diff --git a/test/rubygems/test_gem_package_old.rb b/test/rubygems/test_gem_package_old.rb
index 6236dbbaf2..ddc4e01abb 100644
--- a/test/rubygems/test_gem_package_old.rb
+++ b/test/rubygems/test_gem_package_old.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/simple_gem'
diff --git a/test/rubygems/test_gem_package_tar_header.rb b/test/rubygems/test_gem_package_tar_header.rb
index 9977e282a1..f1ece66aa7 100644
--- a/test/rubygems/test_gem_package_tar_header.rb
+++ b/test/rubygems/test_gem_package_tar_header.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/package/tar_test_case'
require 'rubygems/package'
diff --git a/test/rubygems/test_gem_package_tar_reader.rb b/test/rubygems/test_gem_package_tar_reader.rb
index aa45417b0d..2b6b81e287 100644
--- a/test/rubygems/test_gem_package_tar_reader.rb
+++ b/test/rubygems/test_gem_package_tar_reader.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/package/tar_test_case'
require 'rubygems/package'
diff --git a/test/rubygems/test_gem_package_tar_reader_entry.rb b/test/rubygems/test_gem_package_tar_reader_entry.rb
index 335601b5ca..1138436f00 100644
--- a/test/rubygems/test_gem_package_tar_reader_entry.rb
+++ b/test/rubygems/test_gem_package_tar_reader_entry.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/package/tar_test_case'
require 'rubygems/package'
diff --git a/test/rubygems/test_gem_package_tar_writer.rb b/test/rubygems/test_gem_package_tar_writer.rb
index dac9a54b46..29b7fdb3b9 100644
--- a/test/rubygems/test_gem_package_tar_writer.rb
+++ b/test/rubygems/test_gem_package_tar_writer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/package/tar_test_case'
require 'rubygems/package/tar_writer'
require 'minitest/mock'
diff --git a/test/rubygems/test_gem_package_task.rb b/test/rubygems/test_gem_package_task.rb
index 5b83fc4e3c..f93fc4cc54 100644
--- a/test/rubygems/test_gem_package_task.rb
+++ b/test/rubygems/test_gem_package_task.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems'
begin
diff --git a/test/rubygems/test_gem_path_support.rb b/test/rubygems/test_gem_path_support.rb
index 879cc98b5f..e9e22d0fdc 100644
--- a/test/rubygems/test_gem_path_support.rb
+++ b/test/rubygems/test_gem_path_support.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems'
require 'fileutils'
diff --git a/test/rubygems/test_gem_platform.rb b/test/rubygems/test_gem_platform.rb
index 164977224c..9636afc77f 100644
--- a/test/rubygems/test_gem_platform.rb
+++ b/test/rubygems/test_gem_platform.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/platform'
require 'rbconfig'
diff --git a/test/rubygems/test_gem_rdoc.rb b/test/rubygems/test_gem_rdoc.rb
index 3ff06fe0d5..69d4e2071f 100644
--- a/test/rubygems/test_gem_rdoc.rb
+++ b/test/rubygems/test_gem_rdoc.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems'
require 'rubygems/test_case'
require 'rubygems/rdoc'
diff --git a/test/rubygems/test_gem_remote_fetcher.rb b/test/rubygems/test_gem_remote_fetcher.rb
index 5598e46b26..8b46921401 100644
--- a/test/rubygems/test_gem_remote_fetcher.rb
+++ b/test/rubygems/test_gem_remote_fetcher.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'webrick'
diff --git a/test/rubygems/test_gem_request.rb b/test/rubygems/test_gem_request.rb
index 397f575f37..98cdc80af4 100644
--- a/test/rubygems/test_gem_request.rb
+++ b/test/rubygems/test_gem_request.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/request'
require 'ostruct'
diff --git a/test/rubygems/test_gem_request_connection_pools.rb b/test/rubygems/test_gem_request_connection_pools.rb
index 1944a4f351..30f273029b 100644
--- a/test/rubygems/test_gem_request_connection_pools.rb
+++ b/test/rubygems/test_gem_request_connection_pools.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/request'
require 'timeout'
diff --git a/test/rubygems/test_gem_request_set.rb b/test/rubygems/test_gem_request_set.rb
index 8afab65356..136990264e 100644
--- a/test/rubygems/test_gem_request_set.rb
+++ b/test/rubygems/test_gem_request_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/request_set'
diff --git a/test/rubygems/test_gem_request_set_gem_dependency_api.rb b/test/rubygems/test_gem_request_set_gem_dependency_api.rb
index 5d7f2d1296..6bbe8a6d4f 100644
--- a/test/rubygems/test_gem_request_set_gem_dependency_api.rb
+++ b/test/rubygems/test_gem_request_set_gem_dependency_api.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/request_set'
diff --git a/test/rubygems/test_gem_request_set_lockfile.rb b/test/rubygems/test_gem_request_set_lockfile.rb
index 3b85e256f2..3d30a9aa63 100644
--- a/test/rubygems/test_gem_request_set_lockfile.rb
+++ b/test/rubygems/test_gem_request_set_lockfile.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/request_set'
require 'rubygems/request_set/lockfile'
diff --git a/test/rubygems/test_gem_request_set_lockfile_parser.rb b/test/rubygems/test_gem_request_set_lockfile_parser.rb
index c5b2b19c0e..afb92e2840 100644
--- a/test/rubygems/test_gem_request_set_lockfile_parser.rb
+++ b/test/rubygems/test_gem_request_set_lockfile_parser.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/request_set'
require 'rubygems/request_set/lockfile'
diff --git a/test/rubygems/test_gem_request_set_lockfile_tokenizer.rb b/test/rubygems/test_gem_request_set_lockfile_tokenizer.rb
index b11858361e..230d6118bf 100644
--- a/test/rubygems/test_gem_request_set_lockfile_tokenizer.rb
+++ b/test/rubygems/test_gem_request_set_lockfile_tokenizer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/request_set'
require 'rubygems/request_set/lockfile'
diff --git a/test/rubygems/test_gem_requirement.rb b/test/rubygems/test_gem_requirement.rb
index 234edb4ec3..f608d9458d 100644
--- a/test/rubygems/test_gem_requirement.rb
+++ b/test/rubygems/test_gem_requirement.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require "rubygems/requirement"
diff --git a/test/rubygems/test_gem_resolver.rb b/test/rubygems/test_gem_resolver.rb
index a944a69d9a..54e4817808 100644
--- a/test/rubygems/test_gem_resolver.rb
+++ b/test/rubygems/test_gem_resolver.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemResolver < Gem::TestCase
diff --git a/test/rubygems/test_gem_resolver_activation_request.rb b/test/rubygems/test_gem_resolver_activation_request.rb
index c9163e25de..3456c42722 100644
--- a/test/rubygems/test_gem_resolver_activation_request.rb
+++ b/test/rubygems/test_gem_resolver_activation_request.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemResolverActivationRequest < Gem::TestCase
diff --git a/test/rubygems/test_gem_resolver_api_set.rb b/test/rubygems/test_gem_resolver_api_set.rb
index 4ae54d71b3..beb580f347 100644
--- a/test/rubygems/test_gem_resolver_api_set.rb
+++ b/test/rubygems/test_gem_resolver_api_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemResolverAPISet < Gem::TestCase
diff --git a/test/rubygems/test_gem_resolver_api_specification.rb b/test/rubygems/test_gem_resolver_api_specification.rb
index dfa61e98a0..f4335c74f7 100644
--- a/test/rubygems/test_gem_resolver_api_specification.rb
+++ b/test/rubygems/test_gem_resolver_api_specification.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemResolverAPISpecification < Gem::TestCase
diff --git a/test/rubygems/test_gem_resolver_best_set.rb b/test/rubygems/test_gem_resolver_best_set.rb
index 055438c89b..db2cbea101 100644
--- a/test/rubygems/test_gem_resolver_best_set.rb
+++ b/test/rubygems/test_gem_resolver_best_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemResolverBestSet < Gem::TestCase
diff --git a/test/rubygems/test_gem_resolver_composed_set.rb b/test/rubygems/test_gem_resolver_composed_set.rb
index f8455e1aa4..6032bcf7e2 100644
--- a/test/rubygems/test_gem_resolver_composed_set.rb
+++ b/test/rubygems/test_gem_resolver_composed_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemResolverComposedSet < Gem::TestCase
diff --git a/test/rubygems/test_gem_resolver_conflict.rb b/test/rubygems/test_gem_resolver_conflict.rb
index 0cef0cad2a..d4d81fab6c 100644
--- a/test/rubygems/test_gem_resolver_conflict.rb
+++ b/test/rubygems/test_gem_resolver_conflict.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemResolverConflict < Gem::TestCase
diff --git a/test/rubygems/test_gem_resolver_dependency_request.rb b/test/rubygems/test_gem_resolver_dependency_request.rb
index 0665883971..2587c645db 100644
--- a/test/rubygems/test_gem_resolver_dependency_request.rb
+++ b/test/rubygems/test_gem_resolver_dependency_request.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemResolverDependencyRequest < Gem::TestCase
diff --git a/test/rubygems/test_gem_resolver_git_set.rb b/test/rubygems/test_gem_resolver_git_set.rb
index 3659193456..c6fca20905 100644
--- a/test/rubygems/test_gem_resolver_git_set.rb
+++ b/test/rubygems/test_gem_resolver_git_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemResolverGitSet < Gem::TestCase
diff --git a/test/rubygems/test_gem_resolver_git_specification.rb b/test/rubygems/test_gem_resolver_git_specification.rb
index 7ab297923c..f484b1c779 100644
--- a/test/rubygems/test_gem_resolver_git_specification.rb
+++ b/test/rubygems/test_gem_resolver_git_specification.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/installer'
diff --git a/test/rubygems/test_gem_resolver_index_set.rb b/test/rubygems/test_gem_resolver_index_set.rb
index 04ef8844c1..abac704712 100644
--- a/test/rubygems/test_gem_resolver_index_set.rb
+++ b/test/rubygems/test_gem_resolver_index_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemResolverIndexSet < Gem::TestCase
diff --git a/test/rubygems/test_gem_resolver_index_specification.rb b/test/rubygems/test_gem_resolver_index_specification.rb
index e52f9c7fc6..6e9605218d 100644
--- a/test/rubygems/test_gem_resolver_index_specification.rb
+++ b/test/rubygems/test_gem_resolver_index_specification.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/available_set'
diff --git a/test/rubygems/test_gem_resolver_installed_specification.rb b/test/rubygems/test_gem_resolver_installed_specification.rb
index d52876f030..f24d9ec223 100644
--- a/test/rubygems/test_gem_resolver_installed_specification.rb
+++ b/test/rubygems/test_gem_resolver_installed_specification.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemResolverInstalledSpecification < Gem::TestCase
diff --git a/test/rubygems/test_gem_resolver_installer_set.rb b/test/rubygems/test_gem_resolver_installer_set.rb
index 039582e690..a8627ed141 100644
--- a/test/rubygems/test_gem_resolver_installer_set.rb
+++ b/test/rubygems/test_gem_resolver_installer_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemResolverInstallerSet < Gem::TestCase
diff --git a/test/rubygems/test_gem_resolver_local_specification.rb b/test/rubygems/test_gem_resolver_local_specification.rb
index fc3175a3f7..8eac442171 100644
--- a/test/rubygems/test_gem_resolver_local_specification.rb
+++ b/test/rubygems/test_gem_resolver_local_specification.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/available_set'
diff --git a/test/rubygems/test_gem_resolver_lock_set.rb b/test/rubygems/test_gem_resolver_lock_set.rb
index fdcb8ffa98..745b5dd85b 100644
--- a/test/rubygems/test_gem_resolver_lock_set.rb
+++ b/test/rubygems/test_gem_resolver_lock_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemResolverLockSet < Gem::TestCase
diff --git a/test/rubygems/test_gem_resolver_lock_specification.rb b/test/rubygems/test_gem_resolver_lock_specification.rb
index 93240356ef..eabfec0a0d 100644
--- a/test/rubygems/test_gem_resolver_lock_specification.rb
+++ b/test/rubygems/test_gem_resolver_lock_specification.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/installer'
require 'rubygems/resolver'
diff --git a/test/rubygems/test_gem_resolver_requirement_list.rb b/test/rubygems/test_gem_resolver_requirement_list.rb
index fd9dccb70f..c7192475b8 100644
--- a/test/rubygems/test_gem_resolver_requirement_list.rb
+++ b/test/rubygems/test_gem_resolver_requirement_list.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemResolverRequirementList < Gem::TestCase
diff --git a/test/rubygems/test_gem_resolver_specification.rb b/test/rubygems/test_gem_resolver_specification.rb
index e1ec68a22c..73bda1f989 100644
--- a/test/rubygems/test_gem_resolver_specification.rb
+++ b/test/rubygems/test_gem_resolver_specification.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemResolverSpecification < Gem::TestCase
diff --git a/test/rubygems/test_gem_resolver_vendor_set.rb b/test/rubygems/test_gem_resolver_vendor_set.rb
index 618e251de2..6bb282ad04 100644
--- a/test/rubygems/test_gem_resolver_vendor_set.rb
+++ b/test/rubygems/test_gem_resolver_vendor_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemResolverVendorSet < Gem::TestCase
diff --git a/test/rubygems/test_gem_resolver_vendor_specification.rb b/test/rubygems/test_gem_resolver_vendor_specification.rb
index 3d94cfed00..4d72e34810 100644
--- a/test/rubygems/test_gem_resolver_vendor_specification.rb
+++ b/test/rubygems/test_gem_resolver_vendor_specification.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemResolverVendorSpecification < Gem::TestCase
diff --git a/test/rubygems/test_gem_security.rb b/test/rubygems/test_gem_security.rb
index b8747b79c3..d653d2c262 100644
--- a/test/rubygems/test_gem_security.rb
+++ b/test/rubygems/test_gem_security.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/security'
require 'rubygems/fix_openssl_warnings' if RUBY_VERSION < "1.9"
diff --git a/test/rubygems/test_gem_security_policy.rb b/test/rubygems/test_gem_security_policy.rb
index d708306e79..b911d528df 100644
--- a/test/rubygems/test_gem_security_policy.rb
+++ b/test/rubygems/test_gem_security_policy.rb
@@ -1,4 +1,5 @@
# coding: UTF-8
+# frozen_string_literal: false
require 'rubygems/test_case'
diff --git a/test/rubygems/test_gem_security_signer.rb b/test/rubygems/test_gem_security_signer.rb
index f077a46413..f473d40604 100644
--- a/test/rubygems/test_gem_security_signer.rb
+++ b/test/rubygems/test_gem_security_signer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
unless defined?(OpenSSL::SSL) then
diff --git a/test/rubygems/test_gem_security_trust_dir.rb b/test/rubygems/test_gem_security_trust_dir.rb
index 475db2e790..387c0925b6 100644
--- a/test/rubygems/test_gem_security_trust_dir.rb
+++ b/test/rubygems/test_gem_security_trust_dir.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
unless defined?(OpenSSL::SSL) then
diff --git a/test/rubygems/test_gem_server.rb b/test/rubygems/test_gem_server.rb
index 98a703c9d2..0ebc7d573a 100644
--- a/test/rubygems/test_gem_server.rb
+++ b/test/rubygems/test_gem_server.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/server'
require 'stringio'
diff --git a/test/rubygems/test_gem_silent_ui.rb b/test/rubygems/test_gem_silent_ui.rb
index 01ff79d828..0caf362d46 100644
--- a/test/rubygems/test_gem_silent_ui.rb
+++ b/test/rubygems/test_gem_silent_ui.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/user_interaction'
require 'timeout'
diff --git a/test/rubygems/test_gem_source.rb b/test/rubygems/test_gem_source.rb
index 7d23eeea5e..d4a8a0142d 100644
--- a/test/rubygems/test_gem_source.rb
+++ b/test/rubygems/test_gem_source.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/source'
require 'rubygems/indexer'
diff --git a/test/rubygems/test_gem_source_fetch_problem.rb b/test/rubygems/test_gem_source_fetch_problem.rb
index e8d4785a31..34ac743da7 100644
--- a/test/rubygems/test_gem_source_fetch_problem.rb
+++ b/test/rubygems/test_gem_source_fetch_problem.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemSourceFetchProblem < Gem::TestCase
diff --git a/test/rubygems/test_gem_source_git.rb b/test/rubygems/test_gem_source_git.rb
index 7e5bccacae..ea86d6657b 100644
--- a/test/rubygems/test_gem_source_git.rb
+++ b/test/rubygems/test_gem_source_git.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/source'
diff --git a/test/rubygems/test_gem_source_installed.rb b/test/rubygems/test_gem_source_installed.rb
index 9eaddf72fd..0337036410 100644
--- a/test/rubygems/test_gem_source_installed.rb
+++ b/test/rubygems/test_gem_source_installed.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/source'
diff --git a/test/rubygems/test_gem_source_list.rb b/test/rubygems/test_gem_source_list.rb
index 43db204a50..23ae749aff 100644
--- a/test/rubygems/test_gem_source_list.rb
+++ b/test/rubygems/test_gem_source_list.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/source_list'
require 'rubygems/test_case'
diff --git a/test/rubygems/test_gem_source_local.rb b/test/rubygems/test_gem_source_local.rb
index 19e1c4b759..05c4c7e57c 100644
--- a/test/rubygems/test_gem_source_local.rb
+++ b/test/rubygems/test_gem_source_local.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/source'
diff --git a/test/rubygems/test_gem_source_lock.rb b/test/rubygems/test_gem_source_lock.rb
index 23f063da92..c5596d248b 100644
--- a/test/rubygems/test_gem_source_lock.rb
+++ b/test/rubygems/test_gem_source_lock.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemSourceLock < Gem::TestCase
diff --git a/test/rubygems/test_gem_source_specific_file.rb b/test/rubygems/test_gem_source_specific_file.rb
index 12ef7f5b7c..a54260dfc6 100644
--- a/test/rubygems/test_gem_source_specific_file.rb
+++ b/test/rubygems/test_gem_source_specific_file.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/source'
diff --git a/test/rubygems/test_gem_source_vendor.rb b/test/rubygems/test_gem_source_vendor.rb
index 1d9ae35e84..f59e6a7fdf 100644
--- a/test/rubygems/test_gem_source_vendor.rb
+++ b/test/rubygems/test_gem_source_vendor.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/source'
diff --git a/test/rubygems/test_gem_spec_fetcher.rb b/test/rubygems/test_gem_spec_fetcher.rb
index 6ee1a52fc7..876094f9b7 100644
--- a/test/rubygems/test_gem_spec_fetcher.rb
+++ b/test/rubygems/test_gem_spec_fetcher.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/spec_fetcher'
diff --git a/test/rubygems/test_gem_specification.rb b/test/rubygems/test_gem_specification.rb
index 6c7ee6054a..cfca49a18f 100644
--- a/test/rubygems/test_gem_specification.rb
+++ b/test/rubygems/test_gem_specification.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'benchmark'
require 'rubygems/test_case'
require 'pathname'
diff --git a/test/rubygems/test_gem_stream_ui.rb b/test/rubygems/test_gem_stream_ui.rb
index bea187e8f3..aa6b19f8be 100644
--- a/test/rubygems/test_gem_stream_ui.rb
+++ b/test/rubygems/test_gem_stream_ui.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/user_interaction'
require 'timeout'
diff --git a/test/rubygems/test_gem_stub_specification.rb b/test/rubygems/test_gem_stub_specification.rb
index 786a308556..5ffbc57a9a 100644
--- a/test/rubygems/test_gem_stub_specification.rb
+++ b/test/rubygems/test_gem_stub_specification.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "rubygems/test_case"
require "rubygems/stub_specification"
diff --git a/test/rubygems/test_gem_text.rb b/test/rubygems/test_gem_text.rb
index 90f81fcd51..855e9ac09d 100644
--- a/test/rubygems/test_gem_text.rb
+++ b/test/rubygems/test_gem_text.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require "rubygems/text"
diff --git a/test/rubygems/test_gem_uninstaller.rb b/test/rubygems/test_gem_uninstaller.rb
index c682f72c38..13cc6eb39f 100644
--- a/test/rubygems/test_gem_uninstaller.rb
+++ b/test/rubygems/test_gem_uninstaller.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/installer_test_case'
require 'rubygems/uninstaller'
diff --git a/test/rubygems/test_gem_unsatisfiable_dependency_error.rb b/test/rubygems/test_gem_unsatisfiable_dependency_error.rb
index 6418c5d20e..c7aba3d54a 100644
--- a/test/rubygems/test_gem_unsatisfiable_dependency_error.rb
+++ b/test/rubygems/test_gem_unsatisfiable_dependency_error.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestGemUnsatisfiableDependencyError < Gem::TestCase
diff --git a/test/rubygems/test_gem_uri_formatter.rb b/test/rubygems/test_gem_uri_formatter.rb
index 628b7c54de..036e7cd673 100644
--- a/test/rubygems/test_gem_uri_formatter.rb
+++ b/test/rubygems/test_gem_uri_formatter.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/uri_formatter'
diff --git a/test/rubygems/test_gem_util.rb b/test/rubygems/test_gem_util.rb
index 2546262d7f..8b763f0ff1 100644
--- a/test/rubygems/test_gem_util.rb
+++ b/test/rubygems/test_gem_util.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/util'
diff --git a/test/rubygems/test_gem_validator.rb b/test/rubygems/test_gem_validator.rb
index 4af8b524e1..4770bdfb64 100644
--- a/test/rubygems/test_gem_validator.rb
+++ b/test/rubygems/test_gem_validator.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require "rubygems/simple_gem"
require 'rubygems/validator'
diff --git a/test/rubygems/test_gem_version.rb b/test/rubygems/test_gem_version.rb
index 5a65b5c9c7..ffe4d028f5 100644
--- a/test/rubygems/test_gem_version.rb
+++ b/test/rubygems/test_gem_version.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require "rubygems/version"
diff --git a/test/rubygems/test_gem_version_option.rb b/test/rubygems/test_gem_version_option.rb
index d6035ab800..9af7c63bde 100644
--- a/test/rubygems/test_gem_version_option.rb
+++ b/test/rubygems/test_gem_version_option.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems/command'
require 'rubygems/version_option'
diff --git a/test/rubygems/test_kernel.rb b/test/rubygems/test_kernel.rb
index ee8b248797..f78fe1d317 100644
--- a/test/rubygems/test_kernel.rb
+++ b/test/rubygems/test_kernel.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
class TestKernel < Gem::TestCase
diff --git a/test/rubygems/test_require.rb b/test/rubygems/test_require.rb
index ec6662f917..b0808f96d8 100644
--- a/test/rubygems/test_require.rb
+++ b/test/rubygems/test_require.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rubygems/test_case'
require 'rubygems'
diff --git a/test/runner.rb b/test/runner.rb
index 13506e592e..1fe32fcfc8 100644
--- a/test/runner.rb
+++ b/test/runner.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rbconfig'
src_testdir = File.dirname(File.realpath(__FILE__))
diff --git a/test/scanf/test_scanf.rb b/test/scanf/test_scanf.rb
index 93bb63b6aa..827eb2fc3b 100644
--- a/test/scanf/test_scanf.rb
+++ b/test/scanf/test_scanf.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
# $Id$
#
# scanf for Ruby
diff --git a/test/scanf/test_scanfblocks.rb b/test/scanf/test_scanfblocks.rb
index aea5033a54..1c2265a825 100644
--- a/test/scanf/test_scanfblocks.rb
+++ b/test/scanf/test_scanfblocks.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
# $Id$
#
# scanf for Ruby
diff --git a/test/scanf/test_scanfio.rb b/test/scanf/test_scanfio.rb
index 969a8ad773..cec8750aef 100644
--- a/test/scanf/test_scanfio.rb
+++ b/test/scanf/test_scanfio.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
# $Id$
#
# scanf for Ruby
diff --git a/test/sdbm/test_sdbm.rb b/test/sdbm/test_sdbm.rb
index f415584fa2..154bccebc4 100644
--- a/test/sdbm/test_sdbm.rb
+++ b/test/sdbm/test_sdbm.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'tmpdir'
diff --git a/test/shell/test_command_processor.rb b/test/shell/test_command_processor.rb
index 66e4244ad3..99fe1b222a 100644
--- a/test/shell/test_command_processor.rb
+++ b/test/shell/test_command_processor.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'shell'
require 'tmpdir'
diff --git a/test/stringio/test_stringio.rb b/test/stringio/test_stringio.rb
index bd4a0f1a51..17ae9ab848 100644
--- a/test/stringio/test_stringio.rb
+++ b/test/stringio/test_stringio.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'stringio'
require_relative '../ruby/ut_eof'
diff --git a/test/strscan/test_stringscanner.rb b/test/strscan/test_stringscanner.rb
index 260ab6c558..ee97e454fe 100644
--- a/test/strscan/test_stringscanner.rb
+++ b/test/strscan/test_stringscanner.rb
@@ -1,4 +1,5 @@
# -*- coding: utf-8 -*-
+# frozen_string_literal: false
#
# test/strscan/test_stringscanner.rb
#
diff --git a/test/syslog/test_syslog_logger.rb b/test/syslog/test_syslog_logger.rb
index d1998a18ce..5e0cc765a9 100644
--- a/test/syslog/test_syslog_logger.rb
+++ b/test/syslog/test_syslog_logger.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require 'test/unit'
require 'tempfile'
begin
diff --git a/test/test_abbrev.rb b/test/test_abbrev.rb
index f342c59e20..be9b7d5005 100644
--- a/test/test_abbrev.rb
+++ b/test/test_abbrev.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'abbrev'
diff --git a/test/test_cmath.rb b/test/test_cmath.rb
index 979082ae42..2752ce782c 100644
--- a/test/test_cmath.rb
+++ b/test/test_cmath.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'cmath'
diff --git a/test/test_delegate.rb b/test/test_delegate.rb
index 6270cc61b6..629d191fad 100644
--- a/test/test_delegate.rb
+++ b/test/test_delegate.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'delegate'
diff --git a/test/test_find.rb b/test/test_find.rb
index 2fa81eb0b4..d0e92067f1 100644
--- a/test/test_find.rb
+++ b/test/test_find.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'find'
require 'tmpdir'
diff --git a/test/test_forwardable.rb b/test/test_forwardable.rb
index 6dd015e5a4..a3d03f438b 100644
--- a/test/test_forwardable.rb
+++ b/test/test_forwardable.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'forwardable'
diff --git a/test/test_ipaddr.rb b/test/test_ipaddr.rb
index 88b4a01bcb..b9209f72d9 100644
--- a/test/test_ipaddr.rb
+++ b/test/test_ipaddr.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'ipaddr'
diff --git a/test/test_mathn.rb b/test/test_mathn.rb
index 8a482f3fed..aaf132ba88 100644
--- a/test/test_mathn.rb
+++ b/test/test_mathn.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
# mathn redefines too much. It must be isolated to child processes.
diff --git a/test/test_mutex_m.rb b/test/test_mutex_m.rb
index a29f3f44b5..e31c086f01 100644
--- a/test/test_mutex_m.rb
+++ b/test/test_mutex_m.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'thread'
require 'mutex_m'
diff --git a/test/test_observer.rb b/test/test_observer.rb
index e2c159ad09..c2fa728004 100644
--- a/test/test_observer.rb
+++ b/test/test_observer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'observer'
diff --git a/test/test_prime.rb b/test/test_prime.rb
index f8abebc323..b48ccae319 100644
--- a/test/test_prime.rb
+++ b/test/test_prime.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'prime'
require 'timeout'
diff --git a/test/test_pstore.rb b/test/test_pstore.rb
index e028ed68b4..e7fe4f1d15 100644
--- a/test/test_pstore.rb
+++ b/test/test_pstore.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'pstore'
require 'tmpdir'
diff --git a/test/test_pty.rb b/test/test_pty.rb
index 0ec4f967bd..cedf00f918 100644
--- a/test/test_pty.rb
+++ b/test/test_pty.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'shellwords'
require 'tmpdir'
diff --git a/test/test_rbconfig.rb b/test/test_rbconfig.rb
index 36204500bd..1bbf01b9a6 100644
--- a/test/test_rbconfig.rb
+++ b/test/test_rbconfig.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'rbconfig'
require 'shellwords'
diff --git a/test/test_securerandom.rb b/test/test_securerandom.rb
index da48a3b341..515d05e6b2 100644
--- a/test/test_securerandom.rb
+++ b/test/test_securerandom.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'securerandom'
require 'tempfile'
diff --git a/test/test_set.rb b/test/test_set.rb
index 66944f576f..15c5a13d21 100644
--- a/test/test_set.rb
+++ b/test/test_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'set'
diff --git a/test/test_shellwords.rb b/test/test_shellwords.rb
index c160ed9d1c..2916d5dda6 100644
--- a/test/test_shellwords.rb
+++ b/test/test_shellwords.rb
@@ -1,4 +1,5 @@
# -*- coding: utf-8 -*-
+# frozen_string_literal: false
require 'test/unit'
require 'shellwords'
diff --git a/test/test_singleton.rb b/test/test_singleton.rb
index 36d49372c1..b3c48bb5f5 100644
--- a/test/test_singleton.rb
+++ b/test/test_singleton.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'singleton'
diff --git a/test/test_syslog.rb b/test/test_syslog.rb
index 7f1f76fcb6..c66e5f5fb2 100644
--- a/test/test_syslog.rb
+++ b/test/test_syslog.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
# Please only run this test on machines reasonable for testing.
# If in doubt, ask your admin.
diff --git a/test/test_tempfile.rb b/test/test_tempfile.rb
index bcd953554a..c8af2f5b4d 100644
--- a/test/test_tempfile.rb
+++ b/test/test_tempfile.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'tempfile'
require 'thread'
diff --git a/test/test_timeout.rb b/test/test_timeout.rb
index 911ad8c2e0..94ae83e820 100644
--- a/test/test_timeout.rb
+++ b/test/test_timeout.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'timeout'
require 'thread'
diff --git a/test/test_tmpdir.rb b/test/test_tmpdir.rb
index 842b2ded90..4fc4bca4d5 100644
--- a/test/test_tmpdir.rb
+++ b/test/test_tmpdir.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'tmpdir'
diff --git a/test/test_tracer.rb b/test/test_tracer.rb
index b4ed7fce9f..6622b53663 100644
--- a/test/test_tracer.rb
+++ b/test/test_tracer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'tmpdir'
diff --git a/test/test_unicode_normalize.rb b/test/test_unicode_normalize.rb
index 3dfac8b066..548c8a8cee 100644
--- a/test/test_unicode_normalize.rb
+++ b/test/test_unicode_normalize.rb
@@ -1,4 +1,5 @@
# coding: utf-8
+# frozen_string_literal: false
# Copyright Ayumu Nojima (野島 歩) and Martin J. Dürst (duerst@it.aoyama.ac.jp)
diff --git a/test/test_weakref.rb b/test/test_weakref.rb
index 9f671f4e22..7520e6bc83 100644
--- a/test/test_weakref.rb
+++ b/test/test_weakref.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'weakref'
diff --git a/test/test_win32api.rb b/test/test_win32api.rb
index b1856a3364..6e39ca3360 100644
--- a/test/test_win32api.rb
+++ b/test/test_win32api.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
begin
require "Win32API"
diff --git a/test/testunit/test4test_hideskip.rb b/test/testunit/test4test_hideskip.rb
index 7dba6f57b4..b870c76a84 100644
--- a/test/testunit/test4test_hideskip.rb
+++ b/test/testunit/test4test_hideskip.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
$LOAD_PATH.unshift "#{File.dirname(__FILE__)}/../lib"
require 'test/unit'
diff --git a/test/testunit/test4test_redefinition.rb b/test/testunit/test4test_redefinition.rb
index 77cfd45015..894bc3d905 100644
--- a/test/testunit/test4test_redefinition.rb
+++ b/test/testunit/test4test_redefinition.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
$LOAD_PATH.unshift "#{File.dirname(__FILE__)}/../lib"
require 'test/unit'
diff --git a/test/testunit/test4test_sorting.rb b/test/testunit/test4test_sorting.rb
index b8bb9430b5..4848a78b5d 100644
--- a/test/testunit/test4test_sorting.rb
+++ b/test/testunit/test4test_sorting.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
$LOAD_PATH.unshift "#{File.dirname(__FILE__)}/../lib"
require 'test/unit'
diff --git a/test/testunit/test_assertion.rb b/test/testunit/test_assertion.rb
index 374d6e022b..4cd7bd7e45 100644
--- a/test/testunit/test_assertion.rb
+++ b/test/testunit/test_assertion.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestAssertion < Test::Unit::TestCase
def test_wrong_assertion
diff --git a/test/testunit/test_hideskip.rb b/test/testunit/test_hideskip.rb
index e696b5e1df..a8d7b5500c 100644
--- a/test/testunit/test_hideskip.rb
+++ b/test/testunit/test_hideskip.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestHideSkip < Test::Unit::TestCase
diff --git a/test/testunit/test_parallel.rb b/test/testunit/test_parallel.rb
index f068b344df..3d85f9c211 100644
--- a/test/testunit/test_parallel.rb
+++ b/test/testunit/test_parallel.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'timeout'
diff --git a/test/testunit/test_redefinition.rb b/test/testunit/test_redefinition.rb
index ed11621351..9129e55489 100644
--- a/test/testunit/test_redefinition.rb
+++ b/test/testunit/test_redefinition.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestRedefinition < Test::Unit::TestCase
diff --git a/test/testunit/test_sorting.rb b/test/testunit/test_sorting.rb
index e13ca1fec6..f9de3ec154 100644
--- a/test/testunit/test_sorting.rb
+++ b/test/testunit/test_sorting.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestTestUnitSorting < Test::Unit::TestCase
diff --git a/test/testunit/tests_for_parallel/ptest_first.rb b/test/testunit/tests_for_parallel/ptest_first.rb
index 66c7704a45..f8687335b5 100644
--- a/test/testunit/tests_for_parallel/ptest_first.rb
+++ b/test/testunit/tests_for_parallel/ptest_first.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestA < Test::Unit::TestCase
diff --git a/test/testunit/tests_for_parallel/ptest_forth.rb b/test/testunit/tests_for_parallel/ptest_forth.rb
index 46c88da519..8831676e19 100644
--- a/test/testunit/tests_for_parallel/ptest_forth.rb
+++ b/test/testunit/tests_for_parallel/ptest_forth.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestE < Test::Unit::TestCase
diff --git a/test/testunit/tests_for_parallel/ptest_second.rb b/test/testunit/tests_for_parallel/ptest_second.rb
index 7004d68493..a793c17eb3 100644
--- a/test/testunit/tests_for_parallel/ptest_second.rb
+++ b/test/testunit/tests_for_parallel/ptest_second.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestB < Test::Unit::TestCase
diff --git a/test/testunit/tests_for_parallel/ptest_third.rb b/test/testunit/tests_for_parallel/ptest_third.rb
index 338fc32a91..3f448ecfc1 100644
--- a/test/testunit/tests_for_parallel/ptest_third.rb
+++ b/test/testunit/tests_for_parallel/ptest_third.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestD < Test::Unit::TestCase
diff --git a/test/testunit/tests_for_parallel/runner.rb b/test/testunit/tests_for_parallel/runner.rb
index e262e1e6c7..bece739917 100644
--- a/test/testunit/tests_for_parallel/runner.rb
+++ b/test/testunit/tests_for_parallel/runner.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'rbconfig'
$LOAD_PATH.unshift "#{File.dirname(__FILE__)}/../../lib"
diff --git a/test/thread/test_cv.rb b/test/thread/test_cv.rb
index b399b479f4..53c7d279b4 100644
--- a/test/thread/test_cv.rb
+++ b/test/thread/test_cv.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'thread'
require 'tmpdir'
diff --git a/test/thread/test_queue.rb b/test/thread/test_queue.rb
index 0a1ae48387..32662babed 100644
--- a/test/thread/test_queue.rb
+++ b/test/thread/test_queue.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'thread'
require 'tmpdir'
diff --git a/test/thread/test_sync.rb b/test/thread/test_sync.rb
index 9509cac6c7..e576fc1d32 100644
--- a/test/thread/test_sync.rb
+++ b/test/thread/test_sync.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'sync'
require 'timeout'
diff --git a/test/uri/test_common.rb b/test/uri/test_common.rb
index 562041535e..4a7300fce7 100644
--- a/test/uri/test_common.rb
+++ b/test/uri/test_common.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'uri'
diff --git a/test/uri/test_ftp.rb b/test/uri/test_ftp.rb
index cc6843e60f..0eec984db8 100644
--- a/test/uri/test_ftp.rb
+++ b/test/uri/test_ftp.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'uri/ftp'
diff --git a/test/uri/test_generic.rb b/test/uri/test_generic.rb
index 941d8ffa02..eda6497da2 100644
--- a/test/uri/test_generic.rb
+++ b/test/uri/test_generic.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'uri'
diff --git a/test/uri/test_http.rb b/test/uri/test_http.rb
index 5d04e8cc6d..1125988602 100644
--- a/test/uri/test_http.rb
+++ b/test/uri/test_http.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'uri/http'
diff --git a/test/uri/test_ldap.rb b/test/uri/test_ldap.rb
index a4cdbff275..adad4454b5 100644
--- a/test/uri/test_ldap.rb
+++ b/test/uri/test_ldap.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'uri/ldap'
diff --git a/test/uri/test_mailto.rb b/test/uri/test_mailto.rb
index 9001835d28..4e3b0425fa 100644
--- a/test/uri/test_mailto.rb
+++ b/test/uri/test_mailto.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'uri/mailto'
diff --git a/test/uri/test_parser.rb b/test/uri/test_parser.rb
index 188b4f858c..757ac86c74 100644
--- a/test/uri/test_parser.rb
+++ b/test/uri/test_parser.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'uri'
diff --git a/test/webrick/test_cgi.rb b/test/webrick/test_cgi.rb
index b9d066175f..090286840b 100644
--- a/test/webrick/test_cgi.rb
+++ b/test/webrick/test_cgi.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require_relative "utils"
require "webrick"
require "test/unit"
diff --git a/test/webrick/test_cookie.rb b/test/webrick/test_cookie.rb
index 1652f39ee0..ebbc5939dc 100644
--- a/test/webrick/test_cookie.rb
+++ b/test/webrick/test_cookie.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "webrick/cookie"
diff --git a/test/webrick/test_do_not_reverse_lookup.rb b/test/webrick/test_do_not_reverse_lookup.rb
index 57f3b1d3ef..efcb5a9299 100644
--- a/test/webrick/test_do_not_reverse_lookup.rb
+++ b/test/webrick/test_do_not_reverse_lookup.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "webrick"
require_relative "utils"
diff --git a/test/webrick/test_filehandler.rb b/test/webrick/test_filehandler.rb
index 38b43d75fb..663b237a82 100644
--- a/test/webrick/test_filehandler.rb
+++ b/test/webrick/test_filehandler.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require_relative "utils.rb"
require "webrick"
diff --git a/test/webrick/test_htmlutils.rb b/test/webrick/test_htmlutils.rb
index 1fe49ee226..ae1b8efa95 100644
--- a/test/webrick/test_htmlutils.rb
+++ b/test/webrick/test_htmlutils.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "webrick/htmlutils"
diff --git a/test/webrick/test_httpauth.rb b/test/webrick/test_httpauth.rb
index 27c37f3677..4376b91842 100644
--- a/test/webrick/test_httpauth.rb
+++ b/test/webrick/test_httpauth.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "net/http"
require "tempfile"
diff --git a/test/webrick/test_httpproxy.rb b/test/webrick/test_httpproxy.rb
index 501bb4cbe5..6837f0c738 100644
--- a/test/webrick/test_httpproxy.rb
+++ b/test/webrick/test_httpproxy.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "net/http"
require "webrick"
diff --git a/test/webrick/test_httprequest.rb b/test/webrick/test_httprequest.rb
index 3a7e67579f..45d26f8699 100644
--- a/test/webrick/test_httprequest.rb
+++ b/test/webrick/test_httprequest.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "webrick"
require "stringio"
require "test/unit"
diff --git a/test/webrick/test_httpresponse.rb b/test/webrick/test_httpresponse.rb
index c916ed57c2..b3f06cd469 100644
--- a/test/webrick/test_httpresponse.rb
+++ b/test/webrick/test_httpresponse.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "webrick"
require "minitest/autorun"
require "stringio"
diff --git a/test/webrick/test_httpserver.rb b/test/webrick/test_httpserver.rb
index 933aa0e02e..e718738fc1 100644
--- a/test/webrick/test_httpserver.rb
+++ b/test/webrick/test_httpserver.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "net/http"
require "webrick"
diff --git a/test/webrick/test_httputils.rb b/test/webrick/test_httputils.rb
index 2753cbe6c9..00f297bd09 100644
--- a/test/webrick/test_httputils.rb
+++ b/test/webrick/test_httputils.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "webrick/httputils"
diff --git a/test/webrick/test_httpversion.rb b/test/webrick/test_httpversion.rb
index 81a871a226..e50ee17971 100644
--- a/test/webrick/test_httpversion.rb
+++ b/test/webrick/test_httpversion.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "webrick/httpversion"
diff --git a/test/webrick/test_server.rb b/test/webrick/test_server.rb
index 1a720361cc..4d539d0368 100644
--- a/test/webrick/test_server.rb
+++ b/test/webrick/test_server.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "tempfile"
require "webrick"
diff --git a/test/webrick/test_utils.rb b/test/webrick/test_utils.rb
index fc68124e44..23996de5d2 100644
--- a/test/webrick/test_utils.rb
+++ b/test/webrick/test_utils.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "webrick/utils"
diff --git a/test/webrick/utils.rb b/test/webrick/utils.rb
index 71559a5628..ce667df355 100644
--- a/test/webrick/utils.rb
+++ b/test/webrick/utils.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "webrick"
begin
require "webrick/https"
diff --git a/test/win32ole/err_in_callback.rb b/test/win32ole/err_in_callback.rb
index fabb7bef0e..aa6c9c7e3a 100644
--- a/test/win32ole/err_in_callback.rb
+++ b/test/win32ole/err_in_callback.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'win32ole'
db = WIN32OLE.new('ADODB.Connection')
db.connectionString = "Driver={Microsoft Text Driver (*.txt; *.csv)};DefaultDir=.;"
diff --git a/test/win32ole/test_err_in_callback.rb b/test/win32ole/test_err_in_callback.rb
index cae6d493cb..2c2b4a61a1 100644
--- a/test/win32ole/test_err_in_callback.rb
+++ b/test/win32ole/test_err_in_callback.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
#
# test Win32OLE avoids cfp consistency error when the exception raised
# in WIN32OLE_EVENT handler block. [ruby-dev:35450]
diff --git a/test/win32ole/test_folderitem2_invokeverb.rb b/test/win32ole/test_folderitem2_invokeverb.rb
index c5ec88c218..e11503ca2a 100644
--- a/test/win32ole/test_folderitem2_invokeverb.rb
+++ b/test/win32ole/test_folderitem2_invokeverb.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
#
# This script check that Win32OLE can execute InvokeVerb method of FolderItem2.
#
diff --git a/test/win32ole/test_nil2vtempty.rb b/test/win32ole/test_nil2vtempty.rb
index 8508ecdf97..49757d61b3 100644
--- a/test/win32ole/test_nil2vtempty.rb
+++ b/test/win32ole/test_nil2vtempty.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
# This is test script to check that WIN32OLE should convert nil to VT_EMPTY in second try.
# [ruby-talk:137054]
begin
diff --git a/test/win32ole/test_ole_methods.rb b/test/win32ole/test_ole_methods.rb
index 869828d22f..cb903566b9 100644
--- a/test/win32ole/test_ole_methods.rb
+++ b/test/win32ole/test_ole_methods.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
#
# This is test for [ruby-talk:196897]
#
diff --git a/test/win32ole/test_propertyputref.rb b/test/win32ole/test_propertyputref.rb
index 24459afe9b..93edb50835 100644
--- a/test/win32ole/test_propertyputref.rb
+++ b/test/win32ole/test_propertyputref.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
begin
require 'win32ole'
diff --git a/test/win32ole/test_thread.rb b/test/win32ole/test_thread.rb
index 56a6357932..f1cdfe32b0 100644
--- a/test/win32ole/test_thread.rb
+++ b/test/win32ole/test_thread.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require 'win32ole'
rescue LoadError
diff --git a/test/win32ole/test_win32ole.rb b/test/win32ole/test_win32ole.rb
index 6cf2b3ce3f..c095e6d7ce 100644
--- a/test/win32ole/test_win32ole.rb
+++ b/test/win32ole/test_win32ole.rb
@@ -1,4 +1,5 @@
# coding: us-ascii
+# frozen_string_literal: false
begin
require 'win32ole'
diff --git a/test/win32ole/test_win32ole_event.rb b/test/win32ole/test_win32ole_event.rb
index f91f0a10c5..02bbeee321 100644
--- a/test/win32ole/test_win32ole_event.rb
+++ b/test/win32ole/test_win32ole_event.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require 'win32ole'
rescue LoadError
diff --git a/test/win32ole/test_win32ole_method.rb b/test/win32ole/test_win32ole_method.rb
index 2a4e3d0896..7fb43fd542 100644
--- a/test/win32ole/test_win32ole_method.rb
+++ b/test/win32ole/test_win32ole_method.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require 'win32ole'
rescue LoadError
diff --git a/test/win32ole/test_win32ole_param.rb b/test/win32ole/test_win32ole_param.rb
index 1a4eeff301..4f8104b1d1 100644
--- a/test/win32ole/test_win32ole_param.rb
+++ b/test/win32ole/test_win32ole_param.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require 'win32ole'
rescue LoadError
diff --git a/test/win32ole/test_win32ole_record.rb b/test/win32ole/test_win32ole_record.rb
index e32a9e2a95..654c747711 100644
--- a/test/win32ole/test_win32ole_record.rb
+++ b/test/win32ole/test_win32ole_record.rb
@@ -1,4 +1,5 @@
# coding: us-ascii
+# frozen_string_literal: false
begin
require 'win32ole'
diff --git a/test/win32ole/test_win32ole_type.rb b/test/win32ole/test_win32ole_type.rb
index 5422352f04..ce11e0235f 100644
--- a/test/win32ole/test_win32ole_type.rb
+++ b/test/win32ole/test_win32ole_type.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require 'win32ole'
rescue LoadError
diff --git a/test/win32ole/test_win32ole_typelib.rb b/test/win32ole/test_win32ole_typelib.rb
index a548bc1534..321c019e53 100644
--- a/test/win32ole/test_win32ole_typelib.rb
+++ b/test/win32ole/test_win32ole_typelib.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require 'win32ole'
rescue LoadError
diff --git a/test/win32ole/test_win32ole_variable.rb b/test/win32ole/test_win32ole_variable.rb
index 5fdcb07e4c..826029e0a8 100644
--- a/test/win32ole/test_win32ole_variable.rb
+++ b/test/win32ole/test_win32ole_variable.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require 'win32ole'
rescue LoadError
diff --git a/test/win32ole/test_win32ole_variant.rb b/test/win32ole/test_win32ole_variant.rb
index 27ede7d741..0d27aae5ed 100644
--- a/test/win32ole/test_win32ole_variant.rb
+++ b/test/win32ole/test_win32ole_variant.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require 'win32ole'
rescue LoadError
diff --git a/test/win32ole/test_win32ole_variant_m.rb b/test/win32ole/test_win32ole_variant_m.rb
index b3e48c20f0..25ad56cc21 100644
--- a/test/win32ole/test_win32ole_variant_m.rb
+++ b/test/win32ole/test_win32ole_variant_m.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require 'win32ole'
rescue LoadError
diff --git a/test/win32ole/test_win32ole_variant_outarg.rb b/test/win32ole/test_win32ole_variant_outarg.rb
index ffc8e067bd..aa5793b84c 100644
--- a/test/win32ole/test_win32ole_variant_outarg.rb
+++ b/test/win32ole/test_win32ole_variant_outarg.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require 'win32ole'
rescue LoadError
diff --git a/test/win32ole/test_word.rb b/test/win32ole/test_word.rb
index a67b80bb76..03b0bcbdde 100644
--- a/test/win32ole/test_word.rb
+++ b/test/win32ole/test_word.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
#
# This is test for [ruby-Bugs#3237]
#
diff --git a/test/xmlrpc/test_client.rb b/test/xmlrpc/test_client.rb
index b189728bc6..5a74c5265b 100644
--- a/test/xmlrpc/test_client.rb
+++ b/test/xmlrpc/test_client.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'xmlrpc/client'
require 'net/http'
diff --git a/test/xmlrpc/test_cookie.rb b/test/xmlrpc/test_cookie.rb
index cfcfe4c3f0..32eedca367 100644
--- a/test/xmlrpc/test_cookie.rb
+++ b/test/xmlrpc/test_cookie.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'time'
require 'webrick'
diff --git a/test/xmlrpc/test_datetime.rb b/test/xmlrpc/test_datetime.rb
index d6bb95dfcc..6a46e15f84 100644
--- a/test/xmlrpc/test_datetime.rb
+++ b/test/xmlrpc/test_datetime.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "xmlrpc/datetime"
diff --git a/test/xmlrpc/test_features.rb b/test/xmlrpc/test_features.rb
index 48bb0d4c21..ea97ab8a09 100644
--- a/test/xmlrpc/test_features.rb
+++ b/test/xmlrpc/test_features.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "xmlrpc/create"
require "xmlrpc/parser"
diff --git a/test/xmlrpc/test_marshal.rb b/test/xmlrpc/test_marshal.rb
index 34ddfa9d82..251f9f6f29 100644
--- a/test/xmlrpc/test_marshal.rb
+++ b/test/xmlrpc/test_marshal.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require "xmlrpc/marshal"
diff --git a/test/xmlrpc/test_parser.rb b/test/xmlrpc/test_parser.rb
index 5591645cd4..880044284c 100644
--- a/test/xmlrpc/test_parser.rb
+++ b/test/xmlrpc/test_parser.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'xmlrpc/datetime'
require "xmlrpc/parser"
diff --git a/test/xmlrpc/test_webrick_server.rb b/test/xmlrpc/test_webrick_server.rb
index bc102390c3..268a01382d 100644
--- a/test/xmlrpc/test_webrick_server.rb
+++ b/test/xmlrpc/test_webrick_server.rb
@@ -1,4 +1,5 @@
# coding: utf-8
+# frozen_string_literal: false
require 'test/unit'
require 'webrick'
diff --git a/test/xmlrpc/webrick_testing.rb b/test/xmlrpc/webrick_testing.rb
index 37c0b69a74..ff287f7024 100644
--- a/test/xmlrpc/webrick_testing.rb
+++ b/test/xmlrpc/webrick_testing.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'timeout'
module TestXMLRPC
diff --git a/test/zlib/test_zlib.rb b/test/zlib/test_zlib.rb
index b22e04eb62..37d4b69b0a 100644
--- a/test/zlib/test_zlib.rb
+++ b/test/zlib/test_zlib.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'stringio'
require 'tempfile'