Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\OFFLINE\VulturAr\laravel6-php74\laravel\vendor\phar-io\version\tests\Unit\OrVersionConstraintGroupTest.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\OFFLINE\VulturAr\laravel6-php74\laravel\vendor\phar-io\version\tests\Unit\OrVersionConstraintGroupTest.php on line 18