diff --git a/spec/dummy/app/assets/javascripts/application.js b/spec/dummy/app/assets/javascripts/application.js
index 470abfb253a..2690222b6c5 100644
--- a/spec/dummy/app/assets/javascripts/application.js
+++ b/spec/dummy/app/assets/javascripts/application.js
@@ -10,7 +10,6 @@
 // Read Sprockets README (https://github.com/rails/sprockets#sprockets-directives) for details
 // about supported directives.
 //
-//= require rails-ujs
 // Action Cable provides the framework to deal with WebSockets in Rails.
 // You can generate new channels where WebSocket features live using the `rails generate channel` command.
 //