Fatal error: Uncaught Error: Class "tests\NestedSetsQueryBehaviorTest" not found in /var/www/html/prod/vendor/creocoder/yii2-nested-sets/tests/MysqlNestedSetsQueryBehaviorTest.php:16 Stack trace: #0 {main} thrown in /var/www/html/prod/vendor/creocoder/yii2-nested-sets/tests/MysqlNestedSetsQueryBehaviorTest.php on line 16