I've successfully migrated 2 repos to a pants monorepo. Tests all run! Now I want to make them fast and parallelized, like using pytest-xdist[1] to run them all in parallel. Whats the best way to get ./pants test to be able to use their pytest extension? Passing in

options="-n 10"

errors out w/ unrecognized arguments: -n [1] https://pypi.org/project/pytest-xdist/

The syntax for passthrough arguments is like this:

./pants test.pytest path/to:target -- -n 10

Yup tried that - i think the issue is the pants pytest cant discover the

pytest-xdist

package i

pip installed

you can override the pytest requirement! i believe

./pants options | grep pytest

shows the right option to change

Thats helpful for validating that my option is present in the .ini file, but doesn't fix what I think is a virtualenv problem

pants doesn't require you to mess around with virtualenv, i believe if you run pytest you will be running the pytest specified by that option

Some progress! I added in the

pytest-xdist

as a dependency in a target all my tests depend on, now its giving me a plugin could not be loaded error 🙂

@faint-holiday-82821 if you could please make an issue at https://github.com/pantsbuild/pants/issues/new, we can probably advise you better as the answer isn’t immediately clear in this case — feel free to just copy/paste this slack convo as an issue and give it a descriptive title

got it!