We have tried to little avail to use the unit test module. Unreal frontend doesn’t seem to support hot reloading of unit tests, and it would take alot of deleting binary/intermediate folders and other wizardry to get them to show up at all. So now, we just use mostly check(), ensureMsgf() and unimplemented() to ensure stability of our code.
I also spoke with some unreal engine devs at GDC this year, and they didn’t seem to even know who on the team you would talk to to get more info on unit tests. As far as i know, the functionality is still there, but it has not been officially supported for a while. Which is very unfortunate.