You forgot some assert!(result.success); (and possibly others).
Please use the tip from #1982 before you commit.

take a look at tests/common/util.rs to see all the functions a CmdResult has
you can locally make these fields private (but please don't commit this!) and fix the resulting errors

I already fixed the ones in test_chown and test_id because I had PRs with merge conflicts.

Whoopse, missed that. i guess I was too fixated on stdout. Will do that from now on