Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/ticket-code/vendor/webklex/php-imap/tests/issues/Issue355Test.php:18 Stack trace: #0 {main} thrown in /var/www/ticket-code/vendor/webklex/php-imap/tests/issues/Issue355Test.php on line 18