diff --git a/spec/dummy_app/config/initializers/devise.rb b/spec/dummy_app/config/initializers/devise.rb
index 5a89b0107d..142dcc9d22 100644
--- a/spec/dummy_app/config/initializers/devise.rb
+++ b/spec/dummy_app/config/initializers/devise.rb
@@ -1,3 +1,11 @@
+module Devise
+  class FailureApp
+    def scope
+      @scope ||= warden_options[:scope] || Devise.default_scope
+    end
+  end
+end
+
 # Use this hook to configure devise mailer, warden hooks and so forth. The first
 # four configuration values can also be set straight in your models.
 Devise.setup do |config|