Fatal error: Uncaught Error: Class "WP_UnitTestCase" not found in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/wp-smushit/core/external/wpmudev-analytics/tests/test-wpmudev-analytics.php:3 Stack trace: #0 {main} thrown in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/wp-smushit/core/external/wpmudev-analytics/tests/test-wpmudev-analytics.php on line 3