Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/ramassof/backup.ramas.dev/vendor/symfony/serializer/Tests/Mapping/ClassDiscriminatorMappingTest.php:23 Stack trace: #0 {main} thrown in /home/ramassof/backup.ramas.dev/vendor/symfony/serializer/Tests/Mapping/ClassDiscriminatorMappingTest.php on line 23