While I am also in the camp that doesn&#x27;t quite buy the test-everything-get-100-coverage religion, this article seems to be missing out on the benefits that regression tests at levels lower than end-to-end provide.<p>As the ruby part of the app becomes more and more complex, it&#x27;s not a given that the frontend will change much -- you&#x27;re going to be glad you had something other than end-to-end tests.