diff --git a/activerecord/test/cases/relation/merging_test.rb b/activerecord/test/cases/relation/merging_test.rb
index 54a581e416b75c78684ba8a25d18b31c2aa6a224..0d537fbfe331b81011321d939a9e177538b031b5 100644
--- a/activerecord/test/cases/relation/merging_test.rb
+++ b/activerecord/test/cases/relation/merging_test.rb
@@ -153,7 +153,7 @@ class MergingDifferentRelationsTest < ActiveRecord::TestCase
     rating_1 = comment_1.ratings.create!
 
     comment_2 = dev.comments.create!(body: "I'm John", post: Post.first)
-    rating_2 = comment_2.ratings.create!
+    comment_2.ratings.create!
 
     assert_equal dev.ratings, [rating_1]
   end