Contributing to nose2

Please do!

The Basics

nose2 is hosted on github and uses GitHub for issue tracking.

Please report issues and make feature requests here:

Code Contributions

The main rule is: code changes should include tests.

If you aren’t sure how to add tests, or you don’t know why existing tests fail on your changes, that’s okay! Submit your patch and ask for help testing it.

Local Dev Requirements

To run the tests you must have tox installed.

Optional but useful tools include make and pre-commit.

Running Tests

To run all tests:

$ tox

To run linting checks:

$ tox -e lint

You can also use make test and make lint for these.


nose2 uses black and ruff to enforce code formatting and linting and pre-commit to run these tools.

For the best development experience, we recommend setting up integrations with your editor and git.

Running pre-commit as a git hook is optional. To configure it, you must have pre-commit installed and run:

$ pre-commit install


If you need to bypass pre-commit hooks after setting this up, you can commit with --no-verify