Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/noct-c/www/minorutouki/vendor/symfony/http-foundation/Tests/ResponseHeaderBagTest.php:21 Stack trace: #0 {main} thrown in /home/noct-c/www/minorutouki/vendor/symfony/http-foundation/Tests/ResponseHeaderBagTest.php on line 21