Fatal error: Uncaught Error: Class 'Drupal\Tests\BrowserTestBase' not found in /var/www/html/tmp/contrib/title_field_for_manage_display/src/Tests/TitleFieldTests.php:11 Stack trace: #0 {main} thrown in /var/www/html/tmp/contrib/title_field_for_manage_display/src/Tests/TitleFieldTests.php on line 11