A few years ago I was given a programming test after an initial phone screen with a HR person. They said do it in any language, and it had a fancy framework that let you edit and test the solution before you sent it.

I chose Clojure since I was learning it at the time. The problems were easy and I made working solutions, but the framework wasn't working. I gathered some call stack data and sent it to the people that make the tool. They thanked me for the feedback and later fixed the bug.

I sent the completed code by email to the company with a note about what had happened. Showing clearly that my code works in the form of some tests.

Then, on the basis of this they didn't proceed.