Fatal error: Uncaught Error: Class 'WP_UnitTestCase' not found in /home/pharahml/public_html/wp-content/plugins/wp-filebase/tests/test-tree.php:3 Stack trace: #0 {main} thrown in /home/pharahml/public_html/wp-content/plugins/wp-filebase/tests/test-tree.php on line 3