Yeah I guess we would need both; the assertion above will raise the ObjectNotFound since the first part of the 'create_image' code tries to retrieve instance with id 'unknown-instance'. I am going to push this change - as you note on [JIRA-562](https://issues.apache.org/jira/browse/DTACLOUD-562) this at least addresses the $filter issue (and this second 'images' fix is directly related to the broken build). Feel free to add another assertion here  - what you describe above sounds good,

all the best, marios