...disable it in tests, by adding a body class for tests %body{'data-environment' => Rails.env} overriding the transforms [data-environment="test"] * text-transform: none !important
If your Rails application is using Webpack you need to serve assets on the same host as you application runs, otherwise you will see the following errors in your browser...
faviconit.com
...in all needed sizes, formats and with the HTML needed to include them! In Rails applications with Haml: put all the favicon files into /public store the HTML to app/views/layouts/_favicon.html...