nathanross
what I like about working dir is that it has an easy abbreviation for the variable its bound to (`wd`), what I dislike is that something like `at_fixtures()` would make much more thematic sense with things like `stdout_only_fixture()`. The main thing is that people might read it as, or not be sure if it is, some kind of thing related to the actual in-repo fixture dir. They also have no way of relating it to the directory the command is currentyl operating in.