Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/magento/html/app/code/Aheadworks/Blog/Test/Unit/Model/CategoryRegistryTest.php:28 Stack trace: #0 {main} thrown in /var/www/magento/html/app/code/Aheadworks/Blog/Test/Unit/Model/CategoryRegistryTest.php on line 28