Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /data/htmlwww/new-laravel/vendor/mobiledetect/mobiledetectlib/tests/UserAgentTest.php:9 Stack trace: #0 {main} thrown in /data/htmlwww/new-laravel/vendor/mobiledetect/mobiledetectlib/tests/UserAgentTest.php on line 9