...Use a containerized instance of your database to test your data access layer code for complete compatibility, without requiring a complex setup on developer machines. Trust that your tests will always start with a known state. Use containerized web browsers, compatible with Selenium, to run automated UI tests. Each test gets a fresh, clean instance of the browser, without having to worry about variations in plugins or required updates. Run your application in a short-lived test mode with dependencies, such as databases, message queues or web servers, to give you a rich interactive and explorative testing environment.