Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\laragon\www\nexopos2\vendor\ratchet\rfc6455\tests\unit\Handshake\ServerNegotiatorTest.php:10 Stack trace: #0 {main} thrown in C:\laragon\www\nexopos2\vendor\ratchet\rfc6455\tests\unit\Handshake\ServerNegotiatorTest.php on line 10