suppress testing warning

Author: PedroAugustoRamalhoDuarte

spec/dummy/config/environments/test.rb

@@ -29,7 +29,7 @@
   config.cache_store = :null_store
 
   # Raise exceptions instead of rendering exception templates.
-  config.action_dispatch.show_exceptions = false
+  config.action_dispatch.show_exceptions = :none
 
   # Disable request forgery protection in test environment.
   config.action_controller.allow_forgery_protection = false