vscode-python: Unittest id parsing fails when using `testscenarios`

Environment data

• VS Code version: 1.60.2
• Extension version (available under the Extensions sidebar): v2021.9.1246542782
• OS and version: Ubuntu 20.04
• Python version (& distribution if applicable, e.g. Anaconda): 3.8.10
• Type of virtual environment used (N/A | venv | virtualenv | conda | …): venv
• Relevant/affected Python packages and their versions:
• Relevant/affected Python-related VS Code extensions and their versions:
• Value of the python.languageServer setting: pylance

[NOTE: If you suspect that your issue is related to the Microsoft Python Language Server (python.languageServer: 'Microsoft'), please download our new language server Pylance from the VS Code marketplace to see if that fixes your issue]

Expected behaviour

Clicking “Run Test” on a test should run it.

Actual behaviour

An error is shown in the Python log and the test is not run (see log below).

Steps to reproduce:

[NOTE: Self-contained, minimal reproducing code samples are extremely helpful and will expedite addressing your issue]

1. Configure tests to use unittest

    "python.testing.unittestEnabled": true,
    "python.testing.unittestArgs": [
        "-s",
        "my.tests.module"
    ],

1. After discovery, click “Run Test”

Logs

> ~/src/helios/.tox/py3/bin/python3 ~/.vscode/extensions/ms-python.python-2021.9.1246542782/pythonFiles/visualstudio_py_testlauncher.py --us=helios.tests --up=test*.py --uvInt=1 --result-port=44367 -thelios.tests.tasks.test_tasks.TestUnlinkCVEsTask.test_ignores_unknown_CVEs --testFile=/home/juledwar/src/helios/helios.tests/helios/tests/tasks/test_tasks.py
cwd: ~/src/helios
Error 2021-10-06 13:48:56: [object Object] [object Object]