1 files changed, 5 insertions, 7 deletions
diff --git a/railties/lib/rails/engine.rb b/railties/lib/rails/engine.rb
index 1dede32dd4..e90d41cbec 100644
--- a/railties/lib/rails/engine.rb
+++ b/railties/lib/rails/engine.rb
@@ -519,17 +519,15 @@ module Rails
     # Define the Rack API for this engine.
     def call(env)
       env.merge!(env_config)
-      if env['SCRIPT_NAME']
-        env[routes.env_key] = env['SCRIPT_NAME'].dup
-      end
+      req = ActionDispatch::Request.new env
+      req.routes = routes
+      req.engine_script_name = req.script_name
       app.call(env)
     end
 
     # Defines additional Rack env configuration that is added on each call.
     def env_config
-      @env_config ||= {
-        'action_dispatch.routes' => routes
-      }
+      @env_config ||= {}
     end
 
     # Defines the routes for this engine. If a block is given to
@@ -589,7 +587,7 @@ module Rails
     # I18n load paths are a special case since the ones added
     # later have higher priority.
     initializer :add_locales do
-      config.i18n.railties_load_path.concat(paths["config/locales"].existent)
+      config.i18n.railties_load_path << paths["config/locales"]
     end
 
     initializer :add_view_paths do