Do not run this built-in script in a production instance as you may suffer irretrievable data loss.
Use Test Runner to run JUnit and Spock tests in a development instance only. Follow these steps to run the built-in script:
Enter the list of packages to scan for tests in Packages.
Enter tests to run in Tests.
Click Run to execute the script or click Preview to view changes before implementing them.
Once you select Run, the Results of the script appear.