Hi, I found there is still RAILS_ROOT in _trace.erb, this will cause a deprecation warning displayed: DEPRECATION WARNING: RAILS_ROOT is deprecated! Use Rails.root instead.. (called from _render_template_505937522_82016200_0 at actionpack/lib/action_dispatch/middleware/templates/rescues/_trace.erb: 10) It would be great if in can be changed to Rails.root to reduce the noise on the console. I have created a ticket at: https://rails.lighthouseapp.com/projects/8994-ruby-on-rails/tickets/3411-remove-rails_root-from-action_dispatchs-_trace.erb Many thanks in advance -- Certified Scrum Master http://blog.scrum8.com | http://jobs.scrum8.com | http://twitter.com/scrum8