Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in E:\xampp\htdocs\www\qr251\vendor\simplesoftwareio\simple-qrcode\tests\ImageTest.php:6 Stack trace: #0 {main} thrown in E:\xampp\htdocs\www\qr251\vendor\simplesoftwareio\simple-qrcode\tests\ImageTest.php on line 6