Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in D:\xampp\htdocs\api\web_car_ncr_api\vendor\sebastian\exporter\tests\ExporterTest.php:18 Stack trace: #0 {main} thrown in D:\xampp\htdocs\api\web_car_ncr_api\vendor\sebastian\exporter\tests\ExporterTest.php on line 18