Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/highfiv1/public_html/crm/modules/MailClient/tests/Unit/FolderCollectionTest.php:19 Stack trace: #0 {main} thrown in /home/highfiv1/public_html/crm/modules/MailClient/tests/Unit/FolderCollectionTest.php on line 19