Upgraded to Rails 4

config/environments/test.rb

@@ -8,7 +8,7 @@ Fetsite::Application.configure do
   config.cache_classes = true
 
   # Configure static asset server for tests with Cache-Control for performance
-  config.serve_static_assets = true
+  config.serve_static_files = false
   config.static_cache_control = "public, max-age=3600"
 
   # Log error messages when you accidentally call methods on nil