Fatal error: Uncaught Error: Class 'WP_UnitTestCase' not found in /var/www/html/wp-content/plugins/astroidz/customizer/kirki/tests/test-kirki-helper.php:3 Stack trace: #0 {main} thrown in /var/www/html/wp-content/plugins/astroidz/customizer/kirki/tests/test-kirki-helper.php on line 3