Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /srv/www/sites/public/starter-cms/vendor/laravel/framework/src/Illuminate/Foundation/Testing/TestCase.php:21 Stack trace: #0 {main} thrown in /srv/www/sites/public/starter-cms/vendor/laravel/framework/src/Illuminate/Foundation/Testing/TestCase.php on line 21