Fatal error: Uncaught Error: Class "Drupal\Core\Database\Database" not found in /home/www/drupal8/test/core/modules/system/tests/fixtures/update/drupal-8.site-branding-into-block-2005546.php:12 Stack trace: #0 {main} thrown in /home/www/drupal8/test/core/modules/system/tests/fixtures/update/drupal-8.site-branding-into-block-2005546.php on line 12