diff --git a/activerecord/test/cases/autosave_association_test.rb b/activerecord/test/cases/autosave_association_test.rb
index 08694526af7b1c0f0a9eb9047bb76f5a1b74dd57..49e7147773a92a9cfe5acafce873c1ea44289fb9 100644
--- a/activerecord/test/cases/autosave_association_test.rb
+++ b/activerecord/test/cases/autosave_association_test.rb
@@ -13,6 +13,8 @@
 require 'models/reader'
 require 'models/ship'
 require 'models/ship_part'
+require 'models/tag'
+require 'models/tagging'
 require 'models/treasure'
 require 'models/company'