Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\import-serials\vendor\catfan\medoo\tests\MedooTestCase.php:8 Stack trace: #0 {main} thrown in C:\xampp\htdocs\import-serials\vendor\catfan\medoo\tests\MedooTestCase.php on line 8