Visual Studio Code debugger does not stop at breakpoints with pytest-asyncio

Question

I have a python project that uses pytest. We have some functions that are async and therefore we need to have async tests. In this sense, we added the pytest-asyncio package as a dependency. Now, we can run our tests, but when we try to debug them using Visual Studio Code Test Explorer we came up with the fact that it doesn't stop on breakpoints.

I tried googling older posts bringing up this issue but couldn't find any. Does anyone know if this is a known issue or how I can solve it?

Basically, to replicate this you need to generate a python file with the following test:

import pytest

async def foo():
  hello = "123"
  print(hello)
  return hello

@pytest.mark.asyncio
async def test_foo():
  result = await foo()
assert "123" == result

You first need to run pip install pytest asyncio pytest-asyncio, add some breakpoint on the print(hello) line and then run the tests with the VS Code python test explorer.

Thanks in advance!

Answer 1

Have you chosen Debug Test instead of Run Test?