Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/traildw/www/wp-content/upgrade-temp-backup-old/plugins/jetpack/jetpack_vendor/automattic/jetpack-post-list/tests/php/test-post-thumbnail.php:19 Stack trace: #0 {main} thrown in /home/traildw/www/wp-content/upgrade-temp-backup-old/plugins/jetpack/jetpack_vendor/automattic/jetpack-post-list/tests/php/test-post-thumbnail.php on line 19