Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/pataplou/www/patrick/pataplouf/vendor/symfony/error-handler/Tests/ErrorRenderer/SerializerErrorRendererTest.php:20 Stack trace: #0 {main} thrown in /home/pataplou/www/patrick/pataplouf/vendor/symfony/error-handler/Tests/ErrorRenderer/SerializerErrorRendererTest.php on line 20