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-rw-r--r--activemodel/test/cases/dirty_test.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activemodel/test/cases/dirty_test.rb b/activemodel/test/cases/dirty_test.rb
index b38d84fff2..0edbbffa86 100644
--- a/activemodel/test/cases/dirty_test.rb
+++ b/activemodel/test/cases/dirty_test.rb
@@ -94,7 +94,7 @@ class DirtyTest < ActiveModel::TestCase
end
test "attribute mutation" do
- @model.instance_variable_set("@name", "Yam".dup)
+ @model.instance_variable_set("@name", +"Yam")
assert_not_predicate @model, :name_changed?
@model.name.replace("Hadad")
assert_not_predicate @model, :name_changed?