Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\kalimark\vendor\psy\psysh\test\Formatter\SignatureFormatterTest.php:17 Stack trace: #0 {main} thrown in C:\xampp\htdocs\kalimark\vendor\psy\psysh\test\Formatter\SignatureFormatterTest.php on line 17