@arpit you're right. Authorization as is doesn't require multiple clusters. But we have test cases were Authorization is tested on instance-level. We already have instance-level tests with process instances are being killed, reran etc. by user2 . And we don't have the same for feed instances. So I used multiple clusters in cases were feed replication instances needed. Replication involves 2 or more clusters. That's why I used them here. If we avoid multiple clusters I am not sure we will able to test some Authorization cases related to feeds.