1 files changed, 6 insertions, 1 deletions
diff --git a/activerecord/test/cases/reflection_test.rb b/activerecord/test/cases/reflection_test.rb
index 3b9e4f42a6..912e3c47bb 100644
--- a/activerecord/test/cases/reflection_test.rb
+++ b/activerecord/test/cases/reflection_test.rb
@@ -25,7 +25,7 @@ class ReflectionTest < ActiveRecord::TestCase
   def test_read_attribute_names
     assert_equal(
       %w( id title author_name author_email_address bonus_time written_on last_read content group approved replies_count parent_id parent_title type created_at updated_at ).sort,
-      @first.attribute_names
+      @first.attribute_names.sort
     )
   end
 
@@ -191,6 +191,11 @@ class ReflectionTest < ActiveRecord::TestCase
     assert_kind_of ThroughReflection, Subscriber.reflect_on_association(:books)
   end
 
+  def test_active_record_primary_key
+    assert_equal "nick", Subscriber.reflect_on_association(:subscriptions).active_record_primary_key.to_s
+    assert_equal "name", Author.reflect_on_association(:essay).active_record_primary_key.to_s
+  end
+
   def test_collection_association
     assert Pirate.reflect_on_association(:birds).collection?
     assert Pirate.reflect_on_association(:parrots).collection?