Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/apache/dev/cal/web/vendor/symfony/debug/Tests/Exception/FlattenExceptionTest.php:31 Stack trace: #0 {main} thrown in /var/www/apache/dev/cal/web/vendor/symfony/debug/Tests/Exception/FlattenExceptionTest.php on line 31