Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /var/www/htdocs/github.timshomepage.net/php-kilo/tests/Enum/KeyCodeTest.php:10 Stack trace: #0 {main} thrown in /var/www/htdocs/github.timshomepage.net/php-kilo/tests/Enum/KeyCodeTest.php on line 10