Pytest does not find my tests in Poetry project (VSCode finds) - pytest

Question

I've just created my first Python package using Poetry using the usual poetry new mypackage command. My problem is that pytest does not execute any test when I run it. I'm developing using VSCode and the weird behavior is that VSCode successfully finds and executes my tests.
Poetry created a subdir called mypackage and another called tests. My test file is called tests/test_mypackage.py.
VSCode autodiscoverd the tests, and display them in the test tab. The .vscode/settings.json file has this configuration:
"python.testing.pytestArgs": [
"tests"
],
I've tried the following commands to execute pytest:
With my venv manually activated:
pytest
pytest tests
pytest tests/test_mypackage.py
cd tests;pytest test_mypackage.py
without my venv activated:
poetry run pytest
poetry run pytest tests
The behavior is always the same: nothing happens, as if pytest couldn't detect anything to run.
I've been using VSCode to run the tests, but now I want to put the code under Continuous Integration. How do I run pytest to validate my package?
UPDATE: from inside the virtual env pytest does not prints any output when run, but its return code is 1.

Answer 1

Poetry doesn't require to activate the venv. The command should work:
poetry run pytest
Though, you can activate the venv (with poetry shell) and run just pytest.
For the Test Explorer, I think this is still on development, officially, only Pytest and Unittest are supported, but the VSCode suggested a variable to support Poetry.
Here are the configurations that have worked to me:
{
"python.testing.cwd": ".",
"python.poetryPath": "poetry",
"python.testing.pytestEnabled": true,
"python.testing.pytestPath": ".venv/bin/pytest",
"python.testing.autoTestDiscoverOnSaveEnabled": true,
}
If you additionally needs to use environment variables, set them up in a .env file (it would be better a .env.test, but I couldn't figure it out).

Answer 2

pytest still does not work when running within the activated virtual environment, but I discovered that I can execute it running:
poetry run pytest
I still do not understand why it can't find the test when directly run from the command line even with the venv activated.