Guard all accesses to RubyVM::MJIT with defined?(RubyVM::MJIT) &&

* Otherwise those tests, etc cannot run on alternative Ruby implementations.

18 files changed, 42 insertions, 42 deletions

diff --git a/benchmark/lib/benchmark_driver/runner/mjit_exec.rb b/benchmark/lib/benchmark_driver/runner/mjit_exec.rb
index 9f7c8c8af3..eac3dfba84 100644
--- a/benchmark/lib/benchmark_driver/runner/mjit_exec.rb
+++ b/benchmark/lib/benchmark_driver/runner/mjit_exec.rb
@@ -135,7 +135,7 @@ class BenchmarkDriver::Runner::MjitExec
           nil
         end
         % end
-        RubyVM::MJIT.pause if RubyVM::MJIT.enabled?
+        RubyVM::MJIT.pause if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
 
         def vm
           t = Process.clock_gettime(Process::CLOCK_MONOTONIC)
@@ -172,7 +172,7 @@ class BenchmarkDriver::Runner::MjitExec
         a<%= i %>
         a<%= i %> # --jit-min-calls=2
         % end
-        RubyVM::MJIT.pause if RubyVM::MJIT.enabled?
+        RubyVM::MJIT.pause if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
 
         def vm
           t = Process.clock_gettime(Process::CLOCK_MONOTONIC)
@@ -228,7 +228,7 @@ class BenchmarkDriver::Runner::MjitExec
 
         jit
         jit
-        RubyVM::MJIT.pause if RubyVM::MJIT.enabled?
+        RubyVM::MJIT.pause if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
         File.write(<%= result.dump %>, jit)
       EOS
     end
diff --git a/bootstraptest/runner.rb b/bootstraptest/runner.rb
index 94a90f5e95..334d7a62b4 100755
--- a/bootstraptest/runner.rb
+++ b/bootstraptest/runner.rb
@@ -383,8 +383,8 @@ def assert_normal_exit(testsrc, *rest, timeout: nil, **opt)
 end
 
 def assert_finish(timeout_seconds, testsrc, message = '')
-  if RubyVM.const_defined? :MJIT
-    timeout_seconds *= 3 if RubyVM::MJIT.enabled? # for --jit-wait
+  if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # for --jit-wait
+    timeout_seconds *= 3
   end
   newtest
   show_progress(message) {
diff --git a/test/-ext-/bug_reporter/test_bug_reporter.rb b/test/-ext-/bug_reporter/test_bug_reporter.rb
index 628fcd0340..6b8e1754a7 100644
--- a/test/-ext-/bug_reporter/test_bug_reporter.rb
+++ b/test/-ext-/bug_reporter/test_bug_reporter.rb
@@ -7,7 +7,7 @@ class TestBugReporter < Test::Unit::TestCase
     skip if ENV['RUBY_ON_BUG']
 
     description = RUBY_DESCRIPTION
-    description = description.sub(/\+JIT /, '') if RubyVM::MJIT.enabled?
+    description = description.sub(/\+JIT /, '') if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
     expected_stderr = [
       :*,
       /\[BUG\]\sSegmentation\sfault.*\n/,
diff --git a/test/drb/drbtest.rb b/test/drb/drbtest.rb
index c9e768ad9d..16ffec904b 100644
--- a/test/drb/drbtest.rb
+++ b/test/drb/drbtest.rb
@@ -216,7 +216,7 @@ module DRbCore
   def test_06_timeout
     skip if RUBY_PLATFORM.include?("armv7l-linux")
     skip if RUBY_PLATFORM.include?("sparc-solaris2.10")
-    skip if RubyVM::MJIT.enabled? # expecting a certain delay is difficult for --jit-wait CI
+    skip if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # expecting a certain delay is difficult for --jit-wait CI
     Timeout.timeout(60) do
       ten = Onecky.new(10)
       assert_raise(Timeout::Error) do
diff --git a/test/lib/jit_support.rb b/test/lib/jit_support.rb
index e2bc766ed1..2f6d637ec9 100644
--- a/test/lib/jit_support.rb
+++ b/test/lib/jit_support.rb
@@ -74,7 +74,7 @@ module JITSupport
   end
 
   def remove_mjit_logs(stderr)
-    if RubyVM::MJIT.enabled? # utility for -DFORCE_MJIT_ENABLE
+    if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # utility for -DFORCE_MJIT_ENABLE
       stderr.gsub(/^MJIT warning: Skipped to compile unsupported instruction: \w+\n/m, '')
     else
       stderr
diff --git a/test/net/ftp/test_ftp.rb b/test/net/ftp/test_ftp.rb
index 0907df5132..023e79435a 100644
--- a/test/net/ftp/test_ftp.rb
+++ b/test/net/ftp/test_ftp.rb
@@ -762,7 +762,7 @@ class FTPTest < Test::Unit::TestCase
     begin
       begin
         ftp = Net::FTP.new
-        ftp.read_timeout *= 5 if RubyVM::MJIT.enabled? # for --jit-wait
+        ftp.read_timeout *= 5 if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # for --jit-wait
         ftp.connect(SERVER_ADDR, server.port)
         ftp.login
         assert_match(/\AUSER /, commands.shift)
@@ -807,7 +807,7 @@ class FTPTest < Test::Unit::TestCase
     begin
       begin
         ftp = Net::FTP.new
-        ftp.read_timeout *= 5 if RubyVM::MJIT.enabled? # for --jit-wait
+        ftp.read_timeout *= 5 if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # for --jit-wait
         ftp.connect(SERVER_ADDR, server.port)
         ftp.login
         assert_match(/\AUSER /, commands.shift)
@@ -1545,7 +1545,7 @@ EOF
     begin
       begin
         ftp = Net::FTP.new
-        ftp.read_timeout *= 5 if RubyVM::MJIT.enabled? # for --jit-wait
+        ftp.read_timeout *= 5 if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # for --jit-wait
         ftp.connect(SERVER_ADDR, server.port)
         assert_equal(['LANG EN*', 'UTF8'], ftp.features)
         assert_equal("FEAT\r\n", commands.shift)
@@ -1568,7 +1568,7 @@ EOF
     begin
       begin
         ftp = Net::FTP.new
-        ftp.read_timeout *= 5 if RubyVM::MJIT.enabled? # for --jit-wait
+        ftp.read_timeout *= 5 if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # for --jit-wait
         ftp.connect(SERVER_ADDR, server.port)
         assert_raise(Net::FTPPermError) do
           ftp.features
@@ -1594,7 +1594,7 @@ EOF
     begin
       begin
         ftp = Net::FTP.new
-        ftp.read_timeout *= 5 if RubyVM::MJIT.enabled? # for --jit-wait
+        ftp.read_timeout *= 5 if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # for --jit-wait
         ftp.connect(SERVER_ADDR, server.port)
         ftp.option("UTF8", "ON")
         assert_equal("OPTS UTF8 ON\r\n", commands.shift)
@@ -1653,7 +1653,7 @@ EOF
     begin
       begin
         ftp = Net::FTP.new
-        ftp.read_timeout *= 5 if RubyVM::MJIT.enabled? # for --jit-wait
+        ftp.read_timeout *= 5 if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # for --jit-wait
         ftp.connect(SERVER_ADDR, server.port)
         entry = ftp.mlst("foo")
         assert_equal("/foo", entry.pathname)
@@ -1740,7 +1740,7 @@ EOF
     begin
       begin
         ftp = Net::FTP.new
-        ftp.read_timeout *= 5 if RubyVM::MJIT.enabled? # for --jit-wait
+        ftp.read_timeout *= 5 if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # for --jit-wait
         ftp.connect(SERVER_ADDR, server.port)
         ftp.login
         assert_match(/\AUSER /, commands.shift)
@@ -1779,7 +1779,7 @@ EOF
 
   def test_parse257
     ftp = Net::FTP.new
-    ftp.read_timeout *= 5 if RubyVM::MJIT.enabled? # for --jit-wait
+    ftp.read_timeout *= 5 if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # for --jit-wait
     assert_equal('/foo/bar',
                  ftp.send(:parse257, '257 "/foo/bar" directory created'))
     assert_equal('/foo/bar"baz',
@@ -1918,7 +1918,7 @@ EOF
                          port: port,
                          ssl: { ca_file: CA_FILE },
                          passive: false)
-      ftp.read_timeout *= 5 if RubyVM::MJIT.enabled? # for --jit-wait
+      ftp.read_timeout *= 5 if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # for --jit-wait
       begin
         assert_equal("AUTH TLS\r\n", commands.shift)
         assert_equal("PBSZ 0\r\n", commands.shift)
@@ -2003,7 +2003,7 @@ EOF
                          port: port,
                          ssl: { ca_file: CA_FILE },
                          passive: true)
-      ftp.read_timeout *= 5 if RubyVM::MJIT.enabled? # for --jit-wait
+      ftp.read_timeout *= 5 if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # for --jit-wait
       begin
         assert_equal("AUTH TLS\r\n", commands.shift)
         assert_equal("PBSZ 0\r\n", commands.shift)
@@ -2079,7 +2079,7 @@ EOF
                          ssl: { ca_file: CA_FILE },
                          private_data_connection: false,
                          passive: false)
-      ftp.read_timeout *= 5 if RubyVM::MJIT.enabled? # for --jit-wait
+      ftp.read_timeout *= 5 if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # for --jit-wait
       begin
         assert_equal("AUTH TLS\r\n", commands.shift)
         ftp.login
@@ -2149,7 +2149,7 @@ EOF
                          ssl: { ca_file: CA_FILE },
                          private_data_connection: false,
                          passive: true)
-      ftp.read_timeout *= 5 if RubyVM::MJIT.enabled? # for --jit-wait
+      ftp.read_timeout *= 5 if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # for --jit-wait
       begin
         assert_equal("AUTH TLS\r\n", commands.shift)
         ftp.login
@@ -2230,7 +2230,7 @@ EOF
         ftp = Net::FTP.new(SERVER_NAME,
                            port: server.port,
                            ssl: { ca_file: CA_FILE })
-        ftp.read_timeout *= 5 if RubyVM::MJIT.enabled? # for --jit-wait
+        ftp.read_timeout *= 5 if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # for --jit-wait
         assert_equal("AUTH TLS\r\n", commands.shift)
         assert_equal("PBSZ 0\r\n", commands.shift)
         assert_equal("PROT P\r\n", commands.shift)
@@ -2342,7 +2342,7 @@ EOF
       chdir_to_tmpdir do
         begin
           ftp = Net::FTP.new
-          ftp.read_timeout *= 5 if RubyVM::MJIT.enabled? # for --jit-wait
+          ftp.read_timeout *= 5 if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # for --jit-wait
           ftp.connect(SERVER_ADDR, server.port)
           ftp.login
           assert_match(/\AUSER /, commands.shift)
@@ -2448,7 +2448,7 @@ EOF
         end
         begin
           ftp = Net::FTP.new
-          ftp.read_timeout *= 5 if RubyVM::MJIT.enabled? # for --jit-wait
+          ftp.read_timeout *= 5 if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # for --jit-wait
           ftp.connect(SERVER_ADDR, server.port)
           ftp.login
           assert_match(/\AUSER /, commands.shift)
diff --git a/test/net/http/test_httpresponse.rb b/test/net/http/test_httpresponse.rb
index 628414493c..a70a9bce34 100644
--- a/test/net/http/test_httpresponse.rb
+++ b/test/net/http/test_httpresponse.rb
@@ -78,7 +78,7 @@ EOS
 
   def test_read_body_block_mod
     # http://ci.rvm.jp/results/trunk-mjit-wait@silicon-docker/3019353
-    skip 'too unstable with --jit-wait, and extending read_timeout did not help it' if RubyVM::MJIT.enabled?
+    skip 'too unstable with --jit-wait, and extending read_timeout did not help it' if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
     IO.pipe do |r, w|
       buf = 'x' * 1024
       buf.freeze
diff --git a/test/rinda/test_rinda.rb b/test/rinda/test_rinda.rb
index cd594b38bb..00e1ba7877 100644
--- a/test/rinda/test_rinda.rb
+++ b/test/rinda/test_rinda.rb
@@ -402,7 +402,7 @@ module TupleSpaceTestModule
   end
 
   def test_cancel_02
-    skip 'this test is unstable with --jit-wait' if RubyVM::MJIT.enabled?
+    skip 'this test is unstable with --jit-wait' if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
     entry = @ts.write([:removeme, 1])
     assert_equal([[:removeme, 1]], @ts.read_all([nil, nil]))
     entry.cancel
@@ -662,7 +662,7 @@ class TestRingServer < Test::Unit::TestCase
   end
 
   def test_do_reply_local
-    skip 'timeout-based test becomes unstable with --jit-wait' if RubyVM::MJIT.enabled?
+    skip 'timeout-based test becomes unstable with --jit-wait' if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
     with_timeout(30) {_test_do_reply_local}
   end
 
diff --git a/test/ruby/test_fiber.rb b/test/ruby/test_fiber.rb
index 8729a86f1b..96ffc79950 100644
--- a/test/ruby/test_fiber.rb
+++ b/test/ruby/test_fiber.rb
@@ -34,7 +34,7 @@ class TestFiber < Test::Unit::TestCase
   end
 
   def test_many_fibers
-    skip 'This is unstable on GitHub Actions --jit-wait. TODO: debug it' if RubyVM::MJIT.enabled?
+    skip 'This is unstable on GitHub Actions --jit-wait. TODO: debug it' if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
     max = 10_000
     assert_equal(max, max.times{
       Fiber.new{}
diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 29903e9d64..9b409af319 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -607,7 +607,7 @@ class TestIO < Test::Unit::TestCase
 
   if have_nonblock?
     def test_copy_stream_no_busy_wait
-      skip "MJIT has busy wait on GC. This sometimes fails with --jit." if RubyVM::MJIT.enabled?
+      skip "MJIT has busy wait on GC. This sometimes fails with --jit." if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
       skip "multiple threads already active" if Thread.list.size > 1
 
       msg = 'r58534 [ruby-core:80969] [Backport #13533]'
@@ -1562,7 +1562,7 @@ class TestIO < Test::Unit::TestCase
   end if have_nonblock?
 
   def test_read_nonblock_no_exceptions
-    skip '[ruby-core:90895] MJIT worker may leave fd open in a forked child' if RubyVM::MJIT.enabled? # TODO: consider acquiring GVL from MJIT worker.
+    skip '[ruby-core:90895] MJIT worker may leave fd open in a forked child' if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # TODO: consider acquiring GVL from MJIT worker.
     with_pipe {|r, w|
       assert_equal :wait_readable, r.read_nonblock(4096, exception: false)
       w.puts "HI!"
@@ -2210,7 +2210,7 @@ class TestIO < Test::Unit::TestCase
   def test_autoclose_true_closed_by_finalizer
     # http://ci.rvm.jp/results/trunk-mjit@silicon-docker/1465760
     # http://ci.rvm.jp/results/trunk-mjit@silicon-docker/1469765
-    skip 'this randomly fails with MJIT' if RubyVM::MJIT.enabled?
+    skip 'this randomly fails with MJIT' if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
 
     feature2250 = '[ruby-core:26222]'
     pre = 'ft2250'
diff --git a/test/ruby/test_optimization.rb b/test/ruby/test_optimization.rb
index b38c52ef2e..d0790c7463 100644
--- a/test/ruby/test_optimization.rb
+++ b/test/ruby/test_optimization.rb
@@ -452,7 +452,7 @@ class TestRubyOptimization < Test::Unit::TestCase
   end
 
   def test_tailcall_not_to_grow_stack
-    skip 'currently JIT-ed code always creates a new stack frame' if RubyVM::MJIT.enabled?
+    skip 'currently JIT-ed code always creates a new stack frame' if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
     bug16161 = '[ruby-core:94881]'
 
     tailcall("#{<<-"begin;"}\n#{<<~"end;"}")
diff --git a/test/ruby/test_process.rb b/test/ruby/test_process.rb
index f88324fbbc..65af494bd6 100644
--- a/test/ruby/test_process.rb
+++ b/test/ruby/test_process.rb
@@ -1681,7 +1681,7 @@ class TestProcess < Test::Unit::TestCase
       Process.wait pid
       assert_send [sig_r, :wait_readable, 5], 'self-pipe not readable'
     end
-    if RubyVM::MJIT.enabled? # checking -DMJIT_FORCE_ENABLE. It may trigger extra SIGCHLD.
+    if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # checking -DMJIT_FORCE_ENABLE. It may trigger extra SIGCHLD.
       assert_equal [true], signal_received.uniq, "[ruby-core:19744]"
     else
       assert_equal [true], signal_received, "[ruby-core:19744]"
diff --git a/test/ruby/test_rubyoptions.rb b/test/ruby/test_rubyoptions.rb
index 6ca8dbea33..be08ec6acc 100644
--- a/test/ruby/test_rubyoptions.rb
+++ b/test/ruby/test_rubyoptions.rb
@@ -8,7 +8,7 @@ require_relative '../lib/jit_support'
 
 class TestRubyOptions < Test::Unit::TestCase
   NO_JIT_DESCRIPTION =
-    if RubyVM::MJIT.enabled? # checking -DMJIT_FORCE_ENABLE
+    if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # checking -DMJIT_FORCE_ENABLE
       RUBY_DESCRIPTION.sub(/\+JIT /, '')
     else
       RUBY_DESCRIPTION
@@ -117,7 +117,7 @@ class TestRubyOptions < Test::Unit::TestCase
   def test_verbose
     assert_in_out_err(["-vve", ""]) do |r, e|
       assert_match(VERSION_PATTERN, r[0])
-      if RubyVM::MJIT.enabled? && !mjit_force_enabled? # checking -DMJIT_FORCE_ENABLE
+      if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? && !mjit_force_enabled? # checking -DMJIT_FORCE_ENABLE
         assert_equal(NO_JIT_DESCRIPTION, r[0])
       else
         assert_equal(RUBY_DESCRIPTION, r[0])
@@ -180,7 +180,7 @@ class TestRubyOptions < Test::Unit::TestCase
   def test_version
     assert_in_out_err(%w(--version)) do |r, e|
       assert_match(VERSION_PATTERN, r[0])
-      if RubyVM::MJIT.enabled? # checking -DMJIT_FORCE_ENABLE
+      if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # checking -DMJIT_FORCE_ENABLE
         assert_equal(EnvUtil.invoke_ruby(['-e', 'print RUBY_DESCRIPTION'], '', true).first, r[0])
       else
         assert_equal(RUBY_DESCRIPTION, r[0])
@@ -210,7 +210,7 @@ class TestRubyOptions < Test::Unit::TestCase
       ].each do |args|
         assert_in_out_err(args) do |r, e|
           assert_match(VERSION_PATTERN_WITH_JIT, r[0])
-          if RubyVM::MJIT.enabled? # checking -DMJIT_FORCE_ENABLE
+          if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # checking -DMJIT_FORCE_ENABLE
             assert_equal(RUBY_DESCRIPTION, r[0])
           else
             assert_equal(EnvUtil.invoke_ruby(['--jit', '-e', 'print RUBY_DESCRIPTION'], '', true).first, r[0])
diff --git a/test/ruby/test_settracefunc.rb b/test/ruby/test_settracefunc.rb
index 2caf71c000..7821a221dc 100644
--- a/test/ruby/test_settracefunc.rb
+++ b/test/ruby/test_settracefunc.rb
@@ -1963,7 +1963,7 @@ class TestSetTraceFunc < Test::Unit::TestCase
     Thread.pass until t.status == 'sleep'
     # When MJIT thread exists, t.status becomes 'sleep' even if it does not reach m2t_q.pop.
     # This sleep forces it to reach m2t_q.pop for --jit-wait.
-    sleep 1 if RubyVM::MJIT.enabled?
+    sleep 1 if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
 
     t.add_trace_func proc{|ev, file, line, *args|
       if file == __FILE__
diff --git a/test/ruby/test_thread.rb b/test/ruby/test_thread.rb
index 0af7a37cf8..0eb5d74a7f 100644
--- a/test/ruby/test_thread.rb
+++ b/test/ruby/test_thread.rb
@@ -309,7 +309,7 @@ class TestThread < Test::Unit::TestCase
       s += 1
     end
     Thread.pass until t.stop?
-    sleep 1 if RubyVM::MJIT.enabled? # t.stop? behaves unexpectedly with --jit-wait
+    sleep 1 if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? # t.stop? behaves unexpectedly with --jit-wait
     assert_equal(1, s)
     t.wakeup
     Thread.pass while t.alive?
@@ -1338,7 +1338,7 @@ q.pop
     opts = { timeout: 5, timeout_error: nil }
 
     # prevent SIGABRT from slow shutdown with MJIT
-    opts[:reprieve] = 3 if RubyVM::MJIT.enabled?
+    opts[:reprieve] = 3 if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
 
     assert_normal_exit(<<-_end, '[Bug #8996]', **opts)
       Thread.report_on_exception = false
diff --git a/test/socket/test_socket.rb b/test/socket/test_socket.rb
index 04d677c747..96304b0e54 100644
--- a/test/socket/test_socket.rb
+++ b/test/socket/test_socket.rb
@@ -485,7 +485,7 @@ class TestSocket < Test::Unit::TestCase
         end while IO.select([r], nil, nil, 0.1).nil?
         n
       end
-      timeout = (RubyVM::MJIT.enabled? ? 120 : 30) # for --jit-wait
+      timeout = (defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? ? 120 : 30) # for --jit-wait
       assert_equal([[s1],[],[]], IO.select([s1], nil, nil, timeout))
       msg, _, _, stamp = s1.recvmsg
       assert_equal("a", msg)
diff --git a/tool/test/testunit/test_hideskip.rb b/tool/test/testunit/test_hideskip.rb
index 0188316a2c..13d887189e 100644
--- a/tool/test/testunit/test_hideskip.rb
+++ b/tool/test/testunit/test_hideskip.rb
@@ -6,7 +6,7 @@ class TestHideSkip < Test::Unit::TestCase
     assert_not_match(/^ *1\) Skipped/, hideskip)
     assert_match(/^ *1\) Skipped/, hideskip("--show-skip"))
     output = hideskip("--hide-skip")
-    output.gsub!(/Successful MJIT finish\n/, '') if RubyVM::MJIT.enabled?
+    output.gsub!(/Successful MJIT finish\n/, '') if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
     assert_match(/assertions\/s.\n+1 tests, 0 assertions, 0 failures, 0 errors, 1 skips/, output)
   end
 
diff --git a/tool/test/testunit/test_parallel.rb b/tool/test/testunit/test_parallel.rb
index d5f7cf4487..44e9eb18d8 100644
--- a/tool/test/testunit/test_parallel.rb
+++ b/tool/test/testunit/test_parallel.rb
@@ -6,7 +6,7 @@ module TestParallel
   PARALLEL_RB = "#{File.dirname(__FILE__)}/../../lib/test/unit/parallel.rb"
   TESTS = "#{File.dirname(__FILE__)}/tests_for_parallel"
   # use large timeout for --jit-wait
-  TIMEOUT = EnvUtil.apply_timeout_scale(RubyVM::MJIT.enabled? ? 100 : 30)
+  TIMEOUT = EnvUtil.apply_timeout_scale(defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled? ? 100 : 30)
 
   class TestParallelWorker < Test::Unit::TestCase
     def setup