pre-install-commands for test environment(s)

[13BTurbo]

When I try to run hatch test I get the following error:
No solution found when resolving dependencies. Because <my other package> was not found in the package registry and you require <my other package>, we can conclude that your requirements are unsatisfiable.

For my default and build envs, I use pre-install-commands to install <my other package> (in editable mode, from a sibling repository)
Can I do this for the test environment(s), it does not appear so, unless I'm missing something.

I've tried various combinations of:

[tool.hatch.envs.hatch-test]
[tool.hatch.envs.test]
[tool.hatch.envs.hatch-test.py.x.xx]

[shreechaturvedi]

Put pre-install-commands on [tool.hatch.envs.hatch-test]. That environment is its own template, so it never inherits the hook from default, and hatch test never reads [tool.hatch.envs.test]. Each matrix env (hatch-test.py3.12, and so on) copies this table. You do not name the cells yourself.

hatch-test uses UV, which is the resolver that errors with not found in the package registry for a sibling that is not on an index. Switch that env to pip so the same pre-install you already use will actually satisfy the project install.

[tool.hatch.envs.hatch-test]
installer = "pip"
pre-install-commands = [
  "python -m pip install --editable {root:parent}/my-other-package",
]

Change the directory name to match the checkout. Recreate the env (hatch env remove on the hatch-test.py* env you are using) or the old UV install stays in place.