Fatal error: Uncaught Error: Class "Psy\Test\TestCase" not found in C:\xampp\htdocs\r10csm\vendor\psy\psysh\test\Formatter\SignatureFormatterTest.php:23 Stack trace: #0 {main} thrown in C:\xampp\htdocs\r10csm\vendor\psy\psysh\test\Formatter\SignatureFormatterTest.php on line 23