Fatal error: Uncaught InvalidArgumentException: Invalid database prefix: for in /home/web/drupal/web/core/lib/Drupal/Core/Test/TestDatabase.php:85
Stack trace:
#0 /home/web/drupal/web/core/lib/Drupal/Core/DrupalKernel.php(1021): Drupal\Core\Test\TestDatabase->__construct()
#1 /home/web/drupal/web/core/lib/Drupal/Core/DrupalKernel.php(696): Drupal\Core\DrupalKernel::bootEnvironment()
#2 /home/web/drupal/web/index.php(19): Drupal\Core\DrupalKernel->handle()
#3 {main}
thrown in /home/web/drupal/web/core/lib/Drupal/Core/Test/TestDatabase.php on line 85