diff --git a/railties/test/generators_test.rb b/railties/test/generators_test.rb
index 9241297320..5130b285a9 100644
--- a/railties/test/generators_test.rb
+++ b/railties/test/generators_test.rb
@@ -3,7 +3,6 @@ require 'rails/generators/rails/model/model_generator'
 require 'rails/generators/test_unit/model/model_generator'
 
 class GeneratorsTest < Rails::Generators::TestCase
-  include ActiveSupport::Testing::Isolation
   include GeneratorsTestHelper
 
   def setup