Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\laragon\www\erp-app\vendor\league\uri-interfaces\IPv6\ConverterTest.php:20 Stack trace: #0 {main} thrown in C:\laragon\www\erp-app\vendor\league\uri-interfaces\IPv6\ConverterTest.php on line 20