Hi! Thanks for the response. That didn't work for me as I'm using Xcode 15 and latest Swift version, so it actually builds ok, but the problem is at runtime. However, I found out a TEST constant that is set when building for test so I managed to use like this to avoid referencing SwiftData at all when building for test: #if !TEST @Model #endif final class Set { // ... } I'm not allowed to test anything related to this part of the application, but at least I don't have to disable the entire test suite in order to merge this feature. And I hope the CI is fixed soon so I can delete all these conditional code. :pray: