diff --git a/actionpack/lib/action_dispatch/testing/test_process.rb b/actionpack/lib/action_dispatch/testing/test_process.rb
index d430691429e9ab18bc6c0d650137bf885424c84e..397bda41d51260429caa483cf01b78f2811dcb31 100644
--- a/actionpack/lib/action_dispatch/testing/test_process.rb
+++ b/actionpack/lib/action_dispatch/testing/test_process.rb
@@ -29,7 +29,7 @@ def redirect_to_url
@response.redirect_url
end
- # Shortcut for ARack::Test::UploadedFile.new(ActionController::TestCase.fixture_path + path, type):
+ # Shortcut for Rack::Test::UploadedFile.new(ActionController::TestCase.fixture_path + path, type):
#
# post :change_avatar, :avatar => fixture_file_upload('/files/spongebob.png', 'image/png')
#