Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/magento/html/app/code/Aheadworks/Blog/Test/Unit/Block/AuthorListTest.php:38 Stack trace: #0 {main} thrown in /var/www/magento/html/app/code/Aheadworks/Blog/Test/Unit/Block/AuthorListTest.php on line 38