diff --git a/railties/test/application/sprockets_assets_test.rb b/railties/test/application/sprockets_assets_test.rb
index b9a2209ab77b5..627d69eba487b 100644
--- a/railties/test/application/sprockets_assets_test.rb
+++ b/railties/test/application/sprockets_assets_test.rb
@@ -348,7 +348,7 @@ class User < ActiveRecord::Base; raise 'should not be reached'; end
       # Load app env
       app "development"
 
-      get "/assets/#{URI::DEFAULT_PARSER.escape(asset_path)}"
+      get "/assets/#{URI::RFC2396_PARSER.escape(asset_path)}"
       assert_match "not an image really", last_response.body
       assert_file_exists("#{app_path}/public/assets/#{asset_path}")
     end