1 files changed, 6 insertions, 4 deletions
diff --git a/actionpack/lib/action_controller/metal/exceptions.rb b/actionpack/lib/action_controller/metal/exceptions.rb
index 175dd9eb9e..ce9eb209fe 100644
--- a/actionpack/lib/action_controller/metal/exceptions.rb
+++ b/actionpack/lib/action_controller/metal/exceptions.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ActionController
   class ActionControllerError < StandardError #:nodoc:
   end
@@ -20,7 +22,7 @@ module ActionController
     end
   end
 
-  class ActionController::UrlGenerationError < ActionControllerError #:nodoc:
+  class UrlGenerationError < ActionControllerError #:nodoc:
   end
 
   class MethodNotAllowed < ActionControllerError #:nodoc:
@@ -32,9 +34,6 @@ module ActionController
   class NotImplemented < MethodNotAllowed #:nodoc:
   end
 
-  class UnknownController < ActionControllerError #:nodoc:
-  end
-
   class MissingFile < ActionControllerError #:nodoc:
   end
 
@@ -51,4 +50,7 @@ module ActionController
 
   class UnknownFormat < ActionControllerError #:nodoc:
   end
+
+  class MissingExactTemplate < UnknownFormat #:nodoc:
+  end
 end