Notes
The Automated Test Framework (ATF) enables you to create and run automated tests to confirm that your instance works after making a change. For example, after an upgrade, during application development, or when deploying instance configurations with update sets. Review failed test results to identify the changes that caused the failure and the changes that you should review.
https://www.servicenow.com/docs/bundle/xanadu-application-development/page/administer/auto-test-framework/concept/automated-test-framework.html