I&#x27;m not sure why these things require state-of-the-art technology.<p>Like, testing is basically just checking a bunch of if statements. You can use fancy frameworks that color your tests red and green, but other than that kind of thing, what&#x27;s the actual problem? Why do you say testing in isolation is particularly challenging with OCaml?<p>It&#x27;s been years since I used OCaml and I don&#x27;t know anything about OPAM so I&#x27;m also interested in the answers.<p>Did you try to use OCaml and run into a bunch of difficult problems?