> I got interested in hugs thanks to the surrounding discussion and went spelunking in their codebase. Weirdly, I can't find a test suite! - The November 2003 version <https://github.com/bollu/hugs/blob/master/src/Makefile.in#L280> has a rule in the makefile to cd ../tests . However, such a folder does not exist in the source tree. - the September 2006 version <https://github.com/haskell-implementations/hugs/blob/master/src/Makefile.in>, doesn't have a test / check rule at all. I find this baffling. Where did the tests go?! If you have access to them --- or if you the story behind where the tests are, please do let me know!