Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in C:\xampp\htdocs\OFFLINE\VulturAr\laravel9-php81\vendor\stil\gif-endec\tests\TestCase.php:4 Stack trace: #0 {main} thrown in C:\xampp\htdocs\OFFLINE\VulturAr\laravel9-php81\vendor\stil\gif-endec\tests\TestCase.php on line 4