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-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
3 files changed, 3 insertions, 0 deletions
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