Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\GAPNFlow\tests\Unit\Validators\IbsCbsValidatorTest.php:11 Stack trace: #0 {main} thrown in C:\xampp\htdocs\GAPNFlow\tests\Unit\Validators\IbsCbsValidatorTest.php on line 11