VSCode test discovery hangs forever loading (downgraded to previous version 2024.22.0 and now working as expected)

[ginesr]

Environment data

• Pylance version: 2024.22.1
• OS and version: MacOS Sequoia 15.2 (24C101)
• Python version (& distribution if applicable, e.g. Anaconda): 3.9.21

Code Snippet

No code this is broken in vscode

Repro Steps

1. Click on the tests icon, discover tests loads forever
2. Click on reload tests nothing happen

It started with version 2024.22.1

Expected behavior

Show a list of tests to run

Actual behavior

Loading forever, never ends, no errors, nothing in logs

Logs

Nothing in logs

[Declow]

I'm experiencing the same issue with version 2024.22.1
When trying to force a new refresh of the discovery I get the following error.
2025-01-06 10:15:18.714 [info] Running discovery for pytest using the new test adapter.
2025-01-06 10:15:18.714 [error] Test discovery already in progress, not starting a new one.

• OS and version: MacOS Sequoia 15.1
• Python version: 3.10.13

[bschnurr]

I believe test discovery belongs to vscode-python

[spokeydokeys]

We are seeing this same behavior in my team on MacOS with VSCode (which we updated today as part of our exploration of the error). We tried downgrading pylance but it didn't help. We are running Python 3.11.

Running pytest --collect-only in a terminal outputs the correct list. In the testing extension, if we "refresh" the test list, we see a list of collected tests in the python > output window, but it never finishes and doesn't populate the extension window. If we run "refresh" again, we get the same errors @Declow cited above.

[robws]

Same exact thing Mac, Python 11, pyenv

[babbtx]

Same here. Python 3.11.9 with pyenv virtualenv, unittest (not pytest). Downgraded and it works again. python -m unittest discover runs tests just fine.

[eleanorjboyd]

duplicate of #24656, sorry for the problem and we are working on a fix! Thanks