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Version: 1.0


Hydra uses a test automation tool called nox to manage tests, linting, code coverage, etc. nox will run all the configured sessions. You can see the full list of nox sessions with nox -l and run specific sessions with nox -s NAME (you may need to quote the session name in some cases)

With pytest​

Run pytest at the repository root to run all the Hydra core tests. To run the tests of individual plugins, use pytest plugins/NAME.


Some plugins support fewer versions of Python than the Hydra core.

With nox​

See nox -l. a few examples:

  • nox -s test_core will test Hydra core on all supported Python versions
  • nox -s "test_core-3.6(pip install)" : Test on Python 3.6 with pip install as installation method
  • nox -s "test_plugins-3.8(pip install -e)" : Test plugins on Python 3.8 with pip install -e as installation method