Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp\htdocs\com.arbokcorp.app\vendor\psy\psysh\test\Command\ExitCommandTest.php:17 Stack trace: #0 {main} thrown in C:\xampp\htdocs\com.arbokcorp.app\vendor\psy\psysh\test\Command\ExitCommandTest.php on line 17