We should probably just take a dependency on FluentAssertions in the TestKit. I don't know why we haven't yet. I'll make a bigger issue for this and we'll revisit that prior to releasing v1.4.30. _Originally posted by @Aaronontheweb in https://github.com/akkadotnet/akka.net/pull/5430#discussion_r769172219_