Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/uidn5154/public_html/laravel/vendor/textalk/websocket/tests/MessageTest.php:15 Stack trace: #0 {main} thrown in /home/uidn5154/public_html/laravel/vendor/textalk/websocket/tests/MessageTest.php on line 15