diff --git a/.rubocop.yml b/.rubocop.yml
index 568f53a0f..9a00f24c4 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -74,10 +74,6 @@ Rails/Exit:
 Rails/HasAndBelongsToMany:
   Enabled: false
 
-# TODO: remove in rails 5
-Rails/HttpPositionalArguments:
-  Enabled: false
-
 Rails/Output:
   Enabled: false
 
diff --git a/config/environments/development.rb b/config/environments/development.rb
index 3697ce110..4999baa8d 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -15,7 +15,7 @@
   config.consider_all_requests_local = true
 
   # Enable/disable caching. By default caching is disabled.
-  if Rails.root.join('tmp/caching-dev.txt').exist?
+  if Rails.root.join('tmp', 'caching-dev.txt').exist?
     config.action_controller.perform_caching = true
 
     config.cache_store = :memory_store