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-rw-r--r--activesupport/test/core_ext/object/duplicable_test.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activesupport/test/core_ext/object/duplicable_test.rb b/activesupport/test/core_ext/object/duplicable_test.rb
index 635dd7f281..5203434ae6 100644
--- a/activesupport/test/core_ext/object/duplicable_test.rb
+++ b/activesupport/test/core_ext/object/duplicable_test.rb
@@ -19,7 +19,7 @@ class DuplicableTest < ActiveSupport::TestCase
"* https://github.com/rubinius/rubinius/issues/3089"
RAISE_DUP.each do |v|
- assert !v.duplicable?, "#{ v.inspect } should not be duplicable"
+ assert_not v.duplicable?, "#{ v.inspect } should not be duplicable"
assert_raises(TypeError, v.class.name) { v.dup }
end