1 files changed, 1 insertions, 1 deletions
diff --git a/railties/lib/rails/generators/test_unit/controller/templates/functional_test.rb b/railties/lib/rails/generators/test_unit/controller/templates/functional_test.rb
index 7106096b60..5a8a3ca5e0 100644
--- a/railties/lib/rails/generators/test_unit/controller/templates/functional_test.rb
+++ b/railties/lib/rails/generators/test_unit/controller/templates/functional_test.rb
@@ -2,7 +2,7 @@ require 'test_helper'
 
 <% module_namespacing do -%>
 class <%= class_name %>ControllerTest < ActionController::TestCase
-<% if defined?(ENGINE_ROOT) -%>
+<% if mountable_engine? -%>
   setup do
     @routes = Engine.routes
   end