diff --git a/activerecord/test/cases/associations/belongs_to_associations_test.rb b/activerecord/test/cases/associations/belongs_to_associations_test.rb
index 9006914508..7518bc19f9 100644
--- a/activerecord/test/cases/associations/belongs_to_associations_test.rb
+++ b/activerecord/test/cases/associations/belongs_to_associations_test.rb
@@ -576,9 +576,9 @@ class BelongsToAssociationsTest < ActiveRecord::TestCase
   end
 
   def test_polymorphic_counter_cache
-    tagging = taggings(:welcome_general)
-    post    = posts(:welcome)
-    comment = comments(:greetings)
+    tagging     = taggings(:welcome_general)
+    post = post = posts(:welcome)
+    comment     = comments(:greetings)
 
     assert_difference 'post.reload.taggings_count', -1 do
       assert_difference 'comment.reload.taggings_count', +1 do
diff --git a/activerecord/test/cases/associations/eager_test.rb b/activerecord/test/cases/associations/eager_test.rb
index 9bc7910fc6..3e92a77830 100644
--- a/activerecord/test/cases/associations/eager_test.rb
+++ b/activerecord/test/cases/associations/eager_test.rb
@@ -170,10 +170,10 @@ class EagerAssociationTest < ActiveRecord::TestCase
       assert_equal [comment], category.posts[0].comments
     end
   end
-  
+
   def test_associations_loaded_for_all_records
     post = Post.create!(:title => 'foo', :body => "I like cars!")
-    comment = SpecialComment.create!(:body => 'Come on!', :post => post)
+    SpecialComment.create!(:body => 'Come on!', :post => post)
     first_category = Category.create! :name => 'First!', :posts => [post]
     second_category = Category.create! :name => 'Second!', :posts => [post]
 
diff --git a/activerecord/test/cases/associations/has_many_through_associations_test.rb b/activerecord/test/cases/associations/has_many_through_associations_test.rb
index 70a4e06dbe..89117593fd 100644
--- a/activerecord/test/cases/associations/has_many_through_associations_test.rb
+++ b/activerecord/test/cases/associations/has_many_through_associations_test.rb
@@ -760,7 +760,7 @@ class HasManyThroughAssociationsTest < ActiveRecord::TestCase
   def test_primary_key_option_on_source
     post     = posts(:welcome)
     category = categories(:general)
-    categorization = Categorization.create!(:post_id => post.id, :named_category_name => category.name)
+    Categorization.create!(:post_id => post.id, :named_category_name => category.name)
 
     assert_equal [category], post.named_categories
     assert_equal [category.name], post.named_category_ids # checks when target loaded