How to use pytest, hypothesis and line_profiler / kernprof together?

Question

To figure out Why is this so slow? I wanted to profile my example generation using line_profiler.

However, I can't get it to work. Here's what I tried:

1. kernprof -m pytest -n 3 tests/test_conv.py --hypothesis-profile default
2. pytest -m line_profiler -n 3 tests/test_conv.py --hypothesis-profile default
3. python3 -m line_profiler -m pytest -n 3 tests/test_conv.py --hypothesis-profile default
4. https://pypi.org/project/pytest-line-profiler/

None of which worked. The first three failed immediately either not knowing @profile or pytest or line_profiler IIRC.

How do I get those three to cooperate together? I had high hopes in Nr. 4, however its documentation states you should might want to annotate your test function:

@pytest.mark.line_profile.with_args(f, g)

But my parameters are supplied by hypothesis, so I tried just with

@pytest.mark.line_profile

which did nothing.

I also tried the alternative approach of using the command line:

pytest --line-profile path.to.function_to_be profiled [...]

However, I couldn't figure out what the path.to.function_to_be profiled was in my case. My test function is residing in tests/test_conv.py and is named test_padding. However, neither

pytest -n auto --line-profile test_padding tests/test_conv.py --hypothesis-profile default

nor

pytest -n auto --line-profile test_conv.test_padding tests/test_conv.py --hypothesis-profile default

worked. Both error'd saying they couldn't find that function.

I therefore ask: How?

Installed is (via pip):

pytest
pytest-xdist[psutil]
hypothesis

line_profiler
pytest-line-profiler