py_pytest_main cannot find my tests

[njlr]

I have a test defined like this:

py_pytest_main(
  name = "test_main",
)

py_test(
  name = "tests",
  main = ":test_main.py",
  srcs = [
    ":test_main.py",
  ] + glob([
    "tests/*.py",
  ]),
  deps = [
    ":test_main",
    requirement("pytest"),
  ],
)

Full repro here: https://github.com/njlr/rules_pycross_oci/blob/feature/tests/cowapp/BUILD.bazel

When I run the test, pytest does not find the test file at cowapp/tests/test_foo.py:

collected 0 items

How does py_pytest_main find tests, and how can I fix this?

[njlr]

Ah, the target name tests collides with the folder name!

Watch out for:

runfiles symlink cowapp/tests/test_foo.py -> cowapp/tests/test_foo.py obscured by cowapp/tests -> bazel-out/k8-fastbuild/bin/cowapp/tests