How to have test-only dependencies

[rdong8]

I've tried this:

[tool.hatch.envs.test]
dependencies = ["pytest", "aiohttp"]

[[tool.hatch.envs.hatch-test.matrix]]
python = ["3.13"]
envs = ["test"]

But when I run hatch test I still get ModuleNotFoundError: No module named 'aiohttp'. How can I make it so that hatch test installs the test dependencies first?