Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/pataplou/www/patrick/pataplouf/vendor/symfony/messenger/Tests/Handler/HandleDescriptorTest.php:18 Stack trace: #0 {main} thrown in /home/pataplou/www/patrick/pataplouf/vendor/symfony/messenger/Tests/Handler/HandleDescriptorTest.php on line 18