Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /usr/local/var/www/megatron/vendor/webklex/php-imap/tests/HeaderTest.php:24 Stack trace: #0 {main} thrown in /usr/local/var/www/megatron/vendor/webklex/php-imap/tests/HeaderTest.php on line 24