diff --git a/railties/test/generators/app_generator_test.rb b/railties/test/generators/app_generator_test.rb
index 8fb31a24290a6f18da7b4757e257dcf2605e7e8a..cc0bd53639cdda2696c3700f7f45d074ba2ca1fa 100644
--- a/railties/test/generators/app_generator_test.rb
+++ b/railties/test/generators/app_generator_test.rb
@@ -39,6 +39,8 @@
 class AppGeneratorTest < Rails::Generators::TestCase
   include GeneratorsTestHelper
   arguments [destination_root]
+
+  # brings setup, teardown, and some tests
   include SharedGeneratorTests
 
   def default_files
diff --git a/railties/test/generators/plugin_new_generator_test.rb b/railties/test/generators/plugin_new_generator_test.rb
index 33c8d83f9c7efe82e90da98d91765bc27a3ac629..f637a6a17ed0c72dc58ebe648306f313f6fcf4f3 100644
--- a/railties/test/generators/plugin_new_generator_test.rb
+++ b/railties/test/generators/plugin_new_generator_test.rb
@@ -22,6 +22,8 @@ class PluginNewGeneratorTest < Rails::Generators::TestCase
   include GeneratorsTestHelper
   destination File.join(Rails.root, "tmp/bukkits")
   arguments [destination_root]
+
+  # brings setup, teardown, and some tests
   include SharedGeneratorTests
 
   def default_files
diff --git a/railties/test/generators/shared_generator_tests.rb b/railties/test/generators/shared_generator_tests.rb
index c9c5d2fad2ac6e1e0046a6b6cc9936a896f52aa9..03fd64ca381eafef63d257e4adbef8c692792e62 100644
--- a/railties/test/generators/shared_generator_tests.rb
+++ b/railties/test/generators/shared_generator_tests.rb
@@ -1,3 +1,6 @@
+#
+# Tests, setup, and teardown common to the application and plugin generator suites.
+#
 module SharedGeneratorTests
   def setup
     Rails.application = TestApp::Application