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-rw-r--r--test/coverage/test_coverage.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/test/coverage/test_coverage.rb b/test/coverage/test_coverage.rb
index 2fe7f1b0b9..814b7e088b 100644
--- a/test/coverage/test_coverage.rb
+++ b/test/coverage/test_coverage.rb
@@ -11,7 +11,7 @@ class TestCoverage < Test::Unit::TestCase
# through.
ARGV = ["-rcoverage"]
- if RubyVM::InstructionSequence.compile('').to_a[4][:parser] == :prism
+ if RUBY_ENGINE == "ruby" && RubyVM::InstructionSequence.compile('').to_a[4][:parser] == :prism
ARGV << "-W:no-experimental"
ARGV << "--parser=prism"
end