Fatal error: Uncaught Error: Class "Drupal\Tests\BrowserTestBase" not found in /home/tubu/public_html/Drupal_CMS/cms/recipes/drupal_cms_search/tests/src/Functional/ComponentValidationTest.php:13 Stack trace: #0 {main} thrown in /home/tubu/public_html/Drupal_CMS/cms/recipes/drupal_cms_search/tests/src/Functional/ComponentValidationTest.php on line 13