test/rails_app/app/controllers/application_controller.rb in devise-3.5.10 vs test/rails_app/app/controllers/application_controller.rb in devise-4.0.0.rc1

@@ -1,11 +1,11 @@
 # Filters added to this controller apply to all controllers in the application.
 # Likewise, all the methods added will be available for all controllers.
 
 class ApplicationController < ActionController::Base
   protect_from_forgery
-  before_filter :current_user, unless: :devise_controller?
-  before_filter :authenticate_user!, if: :devise_controller?
+  before_action :current_user, unless: :devise_controller?
+  before_action :authenticate_user!, if: :devise_controller?
   respond_to *Mime::SET.map(&:to_sym)
 
   devise_group :commenter, contains: [:user, :admin]
 end