diff --git a/railties/lib/rails/test_help.rb b/railties/lib/rails/test_help.rb
index 68f566274df..8d0d8cacac1 100644
--- a/railties/lib/rails/test_help.rb
+++ b/railties/lib/rails/test_help.rb
@@ -24,7 +24,7 @@ if defined?(MiniTest)
   end
 end
 
-if defined?(ActiveRecord)
+if defined?(ActiveRecord::Base)
   require 'active_record/test_case'
 
   class ActiveSupport::TestCase