Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/trairtil/public_html/vendor/laravel/framework/tests/Console/Scheduling/CacheEventMutexTest.php:13 Stack trace: #0 {main} thrown in /home/trairtil/public_html/vendor/laravel/framework/tests/Console/Scheduling/CacheEventMutexTest.php on line 13