For integration with various CI pipeline tools with JUnit format support, it would be nice to have JUnit output from check directly instead of relying on external converters such as check2junit.py. It seems from the mailinglist archives that Glenn Washburn did a patch for this back in the days
https://sourceforge.net/p/check/mailman/message/2963561/
and that it was positively received bu the maintainers. Apparently, a larger refactorization was done around that time; was that JUnit patch then never updated to match the new codebase and forgotten?
I did some experiments with applying it to the contemporary codebase, but there is a bit more than simple fixes needed to make things roll with the current codebase design. (And then some better knowledge of check and JUnit than mine is needed.)