Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/app/htdocs/ninja/vendor/symfony/dependency-injection/Tests/Dumper/GraphvizDumperTest.php:20 Stack trace: #0 {main} thrown in /home/app/htdocs/ninja/vendor/symfony/dependency-injection/Tests/Dumper/GraphvizDumperTest.php on line 20