Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /mnt/volume_lon1_01/backend/admin/vendor/phpunit/php-code-coverage/tests/_files/NamespaceCoverageClassExtendedTest.php:4 Stack trace: #0 {main} thrown in /mnt/volume_lon1_01/backend/admin/vendor/phpunit/php-code-coverage/tests/_files/NamespaceCoverageClassExtendedTest.php on line 4