How to run unit tests on Windows?

[pineapple via Digitalmars-d-learn]

I've had success running unit tests on OSX by running `rdmd 
--main -unittest [file]` but have had no such luck on Windows. 
The aforementioned command fails, and `dmd [file] -main 
-unittest` seems to run the program without actually executing 
the unit tests.

Help?