Note: This content is part of my Manning Live Project TDD for a Shopping Website. The ability to randomize the order of tests has always been a useful tool for diagnosing flaky tests. However, until JUnit 5.8.0, developers were only able to randomize the order of methods within a test class using MethodOrder$Random. With the addition of MethodOrderer$ClassOrderer, it is now possible to randomize the test classes too. For the rest of this article, I will walk you through how to enable test classes and methods to run in a random order with the following steps: