Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /var/www/html/sigo-laravel/vendor/chillerlan/php-qrcode/tests/QROptionsTest.php:18 Stack trace: #0 {main} thrown in /var/www/html/sigo-laravel/vendor/chillerlan/php-qrcode/tests/QROptionsTest.php on line 18