Issue #3317504 by Wim Leers, penyaskito: run-tests.sh claims to support...

// Ensure all test locks are released once finished. If tests are run with a

// concurrency of 1 the each test will clean up its own lock. Test locks are

// not released if using a higher concurrency to ensure each test method has

// unique fixtures.

// not released if using a higher concurrency to ensure each test has unique

// fixtures.

TestDatabase::releaseAllTestLocks();

// Display results before database is cleared.

              (e.g., 'node')

  --class     Run tests identified by specific class names, instead of group names.

              A specific test method can be added, for example,

              'Drupal\book\Tests\BookTest::testBookExport'. This argument must

              be last on the command line.

  --file      Run tests identified by specific file names, instead of group names.

              Specify the path and the extension