I might see what you’re trying to do with kcov. I’m guessing this is not (directly) related to your “42 and 53” request earlier. You might be able to kcov ./out zig build test -Doptimize=ReleaseSafe --fuzz to run the fuzzer while kcov watches. Or, if you have a corpus from a previous run that you’d like to re-run while kcov watches, you can run std.testing.fuzz() with a specified .corpus set, like this. (I haven’t yet included this stuff in the doc, here, but intend to.)