ImportError on test discovery (Pre-release version)

[jpgoldberg]

Type: Bug

Behaviour

The behavior is similar to what was reported in issue 24414

 File "/Users/jeffrey/.vscode/extensions/ms-python.python-2025.19.2025111801-darwin-arm64/python_files/vscode_pytest/__init__.py", line 25, in <module>
    from typing_extensions import NotRequired
ImportError: Error importing plugin "vscode_pytest": No module named 'typing_extensions'

(I will attempt to attache the full log)

Important note: Once I switched from "Pre-release version" to released version, the problem disappeared. This means that the attached extension issue you see here is not the same as the extension version I was using when I encountered the problem. Sorry about that.

I was using pytest, but I also tested with unittest test suggested in #24414 (comment)

During test discovery, I was

Steps to reproduce:

Note that I cannot reproduce this at the moment. I will need to try again with the pre-release.

1. Start testing within VSCode
2. See reproted test discovery failure
3. View details of error in output pane.
4. Try lots and lots of things (some details below)
5. Eventually look at another one of my projects in which everything had been working a few days ago.
6. Seeing the same problem in previously working projects.
7. Figure it was time to re-install the extensions
8. Notiching that I was using Preview versions of the extension
9. Switching to released version.
10. Switching to released version resolved the problem.

Things I tried

Initially, I believed that I had made a configuration error with workspaces and this mono-repo. (This later turned out not to be the case as I checked a project that had previously beeen workinghttps://github.com/jpgoldberg/toy-crypto-math just fine a couple of days ago), but I still considered the error peculiar for a configuratin error. None the less, I attemped various things from manually checking that typing-extensions was installed in the environment, to switching Python interprerters, fully quitting and restarting VSCode.

Most usefully for you is that I repeated all of the queries and checks outlined in issue #24414, including the attempt to use unittest instead of pytest and confirmed that the extension was in place.

pytest on the command line was working for me, as was "Debug Current File" on a test file.

Diagnostic data

Python.log. Time stamps are US Central time. It is before 18:45 when I switched to release version of extensions.

2025-11-20 18:29:30.108 [info] Native locator: Refresh started
2025-11-20 18:29:30.108 [info] Pyenv environment manager found at: /opt/homebrew/bin/pyenv
2025-11-20 18:29:30.108 [info] VS Code was launched from an activated environment: '.venv', selecting it as the interpreter for workspace.
2025-11-20 18:29:30.108 [info] Active interpreter [/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades]:  /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/bin/python
2025-11-20 18:29:30.108 [info] > /opt/homebrew/bin/pyenv which python
2025-11-20 18:29:30.108 [info] cwd: .
2025-11-20 18:29:30.133 [info] Python interpreter path: ./.venv/bin/python
2025-11-20 18:29:31.000 [info] Native locator: Refresh finished in 1078 ms
2025-11-20 18:29:32.442 [info] Starting Pylance language server.
2025-11-20 18:29:54.019 [info] Native locator: Refresh started
2025-11-20 18:29:54.032 [info] Pyenv environment manager found at: /opt/homebrew/bin/pyenv
2025-11-20 18:29:54.048 [info] Native locator: Refresh started
2025-11-20 18:29:54.062 [info] VS Code was launched from an activated environment: '.venv', selecting it as the interpreter for workspace.
2025-11-20 18:29:54.129 [info] Active interpreter [/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades]:  /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/bin/python
2025-11-20 18:29:54.134 [info] > /opt/homebrew/bin/pyenv which python
2025-11-20 18:29:54.134 [info] cwd: .
2025-11-20 18:29:54.675 [info] Native locator: Refresh finished in 733 ms
2025-11-20 18:29:54.715 [info] Python interpreter path: ./.venv/bin/python
2025-11-20 18:29:56.082 [info] Starting Pylance language server.
2025-11-20 18:30:05.465 [info] Discover tests for workspace name: grades - uri: /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades
2025-11-20 18:30:05.470 [info] Environment variables set for pytest discovery: PYTHONPATH=/Users/jeffrey/.vscode/extensions/ms-python.python-2025.19.2025111801-darwin-arm64/python_files, TEST_RUN_PIPE=/var/folders/tm/cypvg3691_b5mh6kj15wlft40000gn/T/python-test-discovery-41130c696a513fe56355
2025-11-20 18:30:05.473 [info] > . ./.venv/bin/activate && echo 'e8b39361-0157-4923-80e1-22d70d46dee6' && python ~/.vscode/extensions/ms-python.python-2025.19.2025111801-darwin-arm64/python_files/printEnvVariables.py
2025-11-20 18:30:05.474 [info] shell: bash
2025-11-20 18:30:05.505 [info] > ./.venv/bin/python -m pytest -p vscode_pytest --collect-only tests --rootdir=.
2025-11-20 18:30:05.506 [info] cwd: .
2025-11-20 18:30:05.635 [error] Traceback (most recent call last):

2025-11-20 18:30:05.635 [error]   File "/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/lib/python3.13/site-packages/_pytest/config/__init__.py", line 876, in import_plugin
    __import__(importspec)
    ~~~~~~~~~~^^^^^^^^^^^^
  File "/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/lib/python3.13/site-packages/_pytest/assertion/rewrite.py", line 197, in exec_module
    exec(co, module.__dict__)
    ~~~~^^^^^^^^^^^^^^^^^^^^^
  File "/Users/jeffrey/.vscode/extensions/ms-python.python-2025.19.2025111801-darwin-arm64/python_files/vscode_pytest/__init__.py", line 25, in <module>
    from typing_extensions import NotRequired

2025-11-20 18:30:05.635 [error] ModuleNotFoundError: No module named 'typing_extensions'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):

2025-11-20 18:30:05.636 [error]   File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/lib/python3.13/site-packages/pytest/__main__.py", line 9, in <module>
    raise SystemExit(pytest.console_main())
                     ~~~~~~~~~~~~~~~~~~~^^
  File "/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/lib/python3.13/site-packages/_pytest/config/__init__.py", line 221, in console_main
    code = main()
  File "/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/lib/python3.13/site-packages/_pytest/config/__init__.py", line 191, in main
    config = _prepareconfig(new_args, plugins)
  File "/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/lib/python3.13/site-packages/_pytest/config/__init__.py", line 358, in _prepareconfig
    config: Config = pluginmanager.hook.pytest_cmdline_parse(
                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
        pluginmanager=pluginmanager, args=args
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/lib/python3.13/site-packages/pluggy/_hooks.py", line 512, in __call__
    return self._hookexec(self.name, self._hookimpls.copy(), kwargs, firstresult)
           ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/lib/python3.13/site-packages/pluggy/_manager.py", line 120, in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
           ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/lib/python3.13/site-packages/pluggy/_callers.py", line 167, in _multicall
    raise exception
  File "/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/lib/python3.13/site-packages/pluggy/_callers.py", line 139, in _multicall
    teardown.throw(exception)
    ~~~~~~~~~~~~~~^^^^^^^^^^^
  File "/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/lib/python3.13/site-packages/_pytest/helpconfig.py", line 124, in pytest_cmdline_parse
    config = yield
             ^^^^^
  File "/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/lib/python3.13/site-packages/pluggy/_callers.py", line 121, in _multicall
    res = hook_impl.function(*args)

2025-11-20 18:30:05.636 [error]   File "/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/lib/python3.13/site-packages/_pytest/config/__init__.py", line 1155, in pytest_cmdline_parse
    self.parse(args)
    ~~~~~~~~~~^^^^^^
  File "/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/lib/python3.13/site-packages/_pytest/config/__init__.py", line 1501, in parse
    self.pluginmanager.consider_preparse(args, exclude_only=False)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/lib/python3.13/site-packages/_pytest/config/__init__.py", line 805, in consider_preparse
    self.consider_pluginarg(parg)
    ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
  File "/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/lib/python3.13/site-packages/_pytest/config/__init__.py", line 828, in consider_pluginarg
    self.import_plugin(arg, consider_entry_points=True)
    ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/lib/python3.13/site-packages/_pytest/config/__init__.py", line 878, in import_plugin
    raise ImportError(
        f'Error importing plugin "{modname}": {e.args[0]}'
    ).with_traceback(e.__traceback__) from e
  File "/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/lib/python3.13/site-packages/_pytest/config/__init__.py", line 876, in import_plugin
    __import__(importspec)
    ~~~~~~~~~~^^^^^^^^^^^^
  File "/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/lib/python3.13/site-packages/_pytest/assertion/rewrite.py", line 197, in exec_module
    exec(co, module.__dict__)
    ~~~~^^^^^^^^^^^^^^^^^^^^^
  File "/Users/jeffrey/.vscode/extensions/ms-python.python-2025.19.2025111801-darwin-arm64/python_files/vscode_pytest/__init__.py", line 25, in <module>
    from typing_extensions import NotRequired
ImportError: Error importing plugin "vscode_pytest": No module named 'typing_extensions'

2025-11-20 18:30:05.649 [error] Subprocess exited unsuccessfully with exit code 1 and signal null on workspace /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades.
2025-11-20 18:30:05.649 [error] Subprocess exited unsuccessfully with exit code 1 and signal null on workspace /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades. Creating and sending error discovery payload
2025-11-20 18:30:05.649 [error] pytest test discovery error for workspace:  /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades 
  
 The python test process was terminated before it could exit on its own, the process errored with: Code: 1, Signal: null for workspace /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades
2025-11-20 18:33:02.295 [info] Discover tests for workspace name: grades - uri: /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.vscode/settings.json
2025-11-20 18:33:02.296 [error] Test provider in adapter is not unittest. Please reload window.
2025-11-20 18:33:03.009 [info] Discover tests for workspace name: grades - uri: /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades
2025-11-20 18:33:03.009 [error] Test provider in adapter is not unittest. Please reload window.
2025-11-20 18:35:04.086 [info] > conda info --json
2025-11-20 18:35:38.539 [info] Discover tests for workspace name: grades - uri: /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/tests/test_unittest.py
2025-11-20 18:35:38.540 [error] Test provider in adapter is not unittest. Please reload window.
2025-11-20 18:36:02.010 [info] Discover tests for workspace name: grades - uri: /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/tests/test_unittest.py
2025-11-20 18:36:02.010 [error] Test provider in adapter is not unittest. Please reload window.
2025-11-20 18:36:47.844 [info] Discover tests for workspace name: grades - uri: /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/tests/test_unittest.py
2025-11-20 18:36:47.844 [error] Test provider in adapter is not unittest. Please reload window.
2025-11-20 18:36:58.082 [info] Discover tests for workspace name: grades - uri: /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/tests/test_unittest.py
2025-11-20 18:36:58.082 [error] Test provider in adapter is not unittest. Please reload window.
2025-11-20 18:39:31.826 [info] Discover tests for workspace name: grades - uri: /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades
2025-11-20 18:39:31.826 [error] Test provider in adapter is not unittest. Please reload window.
2025-11-20 18:39:51.799 [info] Discover tests for workspace name: grades - uri: /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.vscode/settings.json
2025-11-20 18:39:51.800 [error] Test provider in adapter is not unittest. Please reload window.
2025-11-20 18:39:52.317 [info] Discover tests for workspace name: grades - uri: /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades
2025-11-20 18:39:52.317 [error] Test provider in adapter is not unittest. Please reload window.
2025-11-20 18:40:51.162 [info] Discover tests for workspace name: grades - uri: /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.vscode/settings.json
2025-11-20 18:40:51.162 [error] Test provider in adapter is not unittest. Please reload window.
2025-11-20 18:40:51.883 [info] Discover tests for workspace name: grades - uri: /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades
2025-11-20 18:40:51.883 [error] Test provider in adapter is not unittest. Please reload window.
2025-11-20 18:44:36.054 [info] Native locator: Refresh started
2025-11-20 18:44:36.066 [info] Native locator: Refresh started
2025-11-20 18:44:36.075 [info] > conda info --json
2025-11-20 18:44:36.079 [info] VS Code was launched from an activated environment: '.venv', selecting it as the interpreter for workspace.
2025-11-20 18:44:36.209 [info] > pyenv which python
2025-11-20 18:44:36.209 [info] cwd: .
2025-11-20 18:44:36.235 [info] Pyenv environment manager found at: /opt/homebrew/bin/pyenv
2025-11-20 18:44:36.965 [info] Python interpreter path: ./.venv/bin/python
2025-11-20 18:44:37.041 [info] Native locator: Refresh finished in 1220 ms
2025-11-20 18:44:38.301 [info] Starting Pylance language server.
2025-11-20 18:45:15.865 [info] Native locator: Refresh started
2025-11-20 18:45:15.877 [info] Native locator: Refresh started
2025-11-20 18:45:15.885 [info] > conda info --json
2025-11-20 18:45:15.889 [info] VS Code was launched from an activated environment: '.venv', selecting it as the interpreter for workspace.
2025-11-20 18:45:16.030 [info] > pyenv which python
2025-11-20 18:45:16.030 [info] cwd: .
2025-11-20 18:45:16.041 [info] Pyenv environment manager found at: /opt/homebrew/bin/pyenv
2025-11-20 18:45:16.764 [info] Python interpreter path: ./.venv/bin/python
2025-11-20 18:45:16.861 [info] Native locator: Refresh finished in 1234 ms
2025-11-20 18:45:17.955 [info] Starting Pylance language server.
2025-11-20 18:46:09.726 [info] Discover tests for workspace name: grades - uri: /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades
2025-11-20 18:46:09.732 [info] Discovering unittest tests for workspace /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades with arguments: /Users/jeffrey/.vscode/extensions/ms-python.python-2025.19.2025111801-darwin-arm64/python_files/unittestadapter/discovery.py,--udiscovery,-v,-s,./tests,-p,test_*.py

2025-11-20 18:46:09.737 [info] > . ./.venv/bin/activate && echo 'e8b39361-0157-4923-80e1-22d70d46dee6' && python ~/.vscode/extensions/ms-python.python-2025.19.2025111801-darwin-arm64/python_files/printEnvVariables.py
2025-11-20 18:46:09.737 [info] shell: bash
2025-11-20 18:46:09.775 [info] > ./.venv/bin/python ~/.vscode/extensions/ms-python.python-2025.19.2025111801-darwin-arm64/python_files/unittestadapter/discovery.py --udiscovery -v -s ./tests -p test_*.py
2025-11-20 18:46:09.775 [info] cwd: .
2025-11-20 18:47:42.634 [info] Running UNITTEST execution for the following test ids: test_grades.TestDefault.test_abnormal,test_grades.TestDefault.test_exceptions,test_grades.TestDefault.test_init,test_grades.TestDefault.test_normal
2025-11-20 18:47:42.634 [info] Attempting to use temp directory for test ids file, file name: test-ids-d6ba19cb287c500df132.txt
2025-11-20 18:47:42.635 [info] All environment variables set for unittest execution, PYTHONPATH: "/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades"
2025-11-20 18:47:42.636 [info] Running unittests for workspace /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades with arguments: /Users/jeffrey/.vscode/extensions/ms-python.python-2025.19.2025111801-darwin-arm64/python_files/unittestadapter/execution.py,--udiscovery,-v,-s,./tests,-p,test_*.py

2025-11-20 18:47:42.636 [info] > ./.venv/bin/python ~/.vscode/extensions/ms-python.python-2025.19.2025111801-darwin-arm64/python_files/unittestadapter/execution.py --udiscovery -v -s ./tests -p test_*.py
2025-11-20 18:47:42.636 [info] cwd: .
2025-11-20 18:47:42.790 [info] Test Result named pipe /var/folders/tm/cypvg3691_b5mh6kj15wlft40000gn/T/python-test-results-dab1d69df3e2c962db7c  cancelled
2025-11-20 18:48:08.137 [info] Discover tests for workspace name: grades - uri: /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades
2025-11-20 18:48:08.141 [info] Discovering unittest tests for workspace /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades with arguments: /Users/jeffrey/.vscode/extensions/ms-python.python-2025.19.2025111801-darwin-arm64/python_files/unittestadapter/discovery.py,--udiscovery,-v,-s,./tests,-p,test_*.py

2025-11-20 18:48:08.142 [info] > ./.venv/bin/python ~/.vscode/extensions/ms-python.python-2025.19.2025111801-darwin-arm64/python_files/unittestadapter/discovery.py --udiscovery -v -s ./tests -p test_*.py
2025-11-20 18:48:08.142 [info] cwd: .
2025-11-20 18:48:11.846 [info] > . ./.venv/bin/activate && echo 'e8b39361-0157-4923-80e1-22d70d46dee6' && python ~/.vscode/extensions/ms-python.python-2025.19.2025111801-darwin-arm64/python_files/printEnvVariables.py
2025-11-20 18:48:11.846 [info] shell: bash
2025-11-20 18:48:11.878 [info] > ./.venv/bin/python -c "import pytest"
2025-11-20 18:48:12.348 [info] Discover tests for workspace name: grades - uri: /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.vscode/settings.json
2025-11-20 18:48:12.348 [error] Test provider in adapter is not pytest. Please reload window.
2025-11-20 18:48:12.864 [info] Discover tests for workspace name: grades - uri: /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades
2025-11-20 18:48:12.865 [error] Test provider in adapter is not pytest. Please reload window.
2025-11-20 18:48:23.639 [info] Running UNITTEST execution for the following test ids: test_grades.TestDefault.test_abnormal,test_grades.TestDefault.test_exceptions,test_grades.TestDefault.test_init,test_grades.TestDefault.test_normal,test_grades.TestGrader.test_duplicate_grades,test_grades.TestGrader.test_min_mismatch
2025-11-20 18:48:23.639 [info] Attempting to use temp directory for test ids file, file name: test-ids-9e09af14ecb27e033c2c.txt
2025-11-20 18:48:23.641 [info] All environment variables set for unittest execution, PYTHONPATH: "/Users/jeffrey/src/github.com/jpgoldberg/pointless/grades"
2025-11-20 18:48:23.642 [info] Running unittests for workspace /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades with arguments: /Users/jeffrey/.vscode/extensions/ms-python.python-2025.19.2025111801-darwin-arm64/python_files/unittestadapter/execution.py,--udiscovery,-v,-s,./tests,-p,test_*.py

2025-11-20 18:48:23.642 [info] > ./.venv/bin/python ~/.vscode/extensions/ms-python.python-2025.19.2025111801-darwin-arm64/python_files/unittestadapter/execution.py --udiscovery -v -s ./tests -p test_*.py
2025-11-20 18:48:23.642 [info] cwd: .
2025-11-20 18:48:23.785 [info] Test Result named pipe /var/folders/tm/cypvg3691_b5mh6kj15wlft40000gn/T/python-test-results-0583009a3ca93f18f981  cancelled
2025-11-20 18:49:30.543 [info] Send text to terminal: source /Users/jeffrey/src/github.com/jpgoldberg/pointless/grades/.venv/bin/activate

Extension version: 2025.19.2025111801
VS Code version: Code 1.106.2 (Universal) (1e3c50d64110be466c0b4a45222e81d2c9352888, 2025-11-19T16:56:50.023Z)
OS version: Darwin arm64 25.1.0
Modes:

• Python version (& distribution if applicable, e.g. Anaconda): 3.13.3
• Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Venv
• Value of the python.languageServer setting: Default

User Settings

languageServer: "Pylance"

testing
• pytestArgs: "<placeholder>"
• pytestEnabled: true
• unittestArgs: "<placeholder>"

Installed Extensions

Extension Name	Extension Id	Version
debugpy	ms-	2025.16.0
dependi	fil	0.7.18
errorlens	use	3.26.0
even-better-toml	tam	0.21.2
flake8	ms-	2025.2.0
github-vscode-theme	Git	6.3.5
gitlens	eam	17.7.1
isort	ms-	2025.0.0
js-debug	ms-	1.105.0
js-debug-companion	ms-	1.1.3
jupyter	ms-	2025.9.1
jupyter-keymap	ms-	1.1.2
jupyter-renderers	ms-	1.3.0
latex-workshop	Jam	10.11.3
makefile-tools	ms-	0.12.17
markdown-all-in-one	yzh	3.6.3
markdown-mermaid	bie	1.29.0
markdown-pdf	yza	1.5.0
mypy-type-checker	ms-	2025.2.0
myst-tml-syntax	chr	0.1.3
python	ms-	2025.19.2025111801
remote-containers	ms-	0.431.1
restructuredtext	lex	190.4.11
ruff	cha	2025.28.0
spellright	ban	3.0.146
uv-wingman	DJS	1.0.3
vscode-containers	ms-	2.3.0
vscode-docker	ms-	2.0.0
vscode-github-actions	git	0.28.0
vscode-github-issue-notebooks	ms-	0.0.134
vscode-icons	vsc	12.15.0
vscode-js-profile-table	ms-	1.0.10
vscode-jupyter-cell-tags	ms-	0.1.9
vscode-jupyter-slideshow	ms-	0.1.6
vscode-markdownlint	Dav	0.60.0
vscode-pylance	ms-	2025.9.1
vscode-python-envs	ms-	1.12.0
vscode-stylelint	sty	1.5.3
vscode-yaml	red	1.19.1
winteriscoming	joh	1.4.4

System Info

Item	Value
CPUs	Apple M2 Pro (12 x 2400)
GPU Status	2d_canvas: enabled direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: enabled_on trees_in_viz: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	2, 5, 4
Memory (System)	16.00GB (0.09GB free)
Process Argv	. --crash-reporter-id 79d605a8-6bcd-428b-a2b8-108a9f8c79d1
Screen Reader	no
VM	0%

A/B Experiments

vsliv368cf:30146710
binariesv615:30325510
nativeloc1:31344060
dwcopilot:31170013
dwoutputs:31242946
copilot_t_ci:31333650
e5gg6876:31282496
pythonrdcb7:31342333
aj953862:31281341
nes-set-on:31340697
6abeh943:31336334
aa_t:31379598
c12345:31413568
gaj49834:31404438
cloudbuttont:31379625
todos-1:31405332
qwen_all_req:31402696
treatment_gpt5applypatchexclusively:31412086
3efgi100_wstrepl:31403338
trigger-command-fix:31379601
auto_model_enabled:31385282
use-responses-api:31390855
defaultusage:31403421
auto_g2946222:31414244
je187915:31401254
afag3459:31419926
ec5jj548:31422691
chatvisible:31420716
expandedtokens:31420720
c0683394:31419495
g0h3h215:31423210

[jpgoldberg]

Update: I have not (yet) been able to reproduce this, even if I return to using the pre-release version. As a consequence, that means that I don't know whether merely reloading the extension or switching to the release version is what resolved this for me.

A possible fix (without actually identifying what went wrong) for those using Python 3.11 or greater might be to replace in vscode_pytest/__init__.py

from typing_extensions import NotRequired

with

try:
    from typing import NotRequired
except ImportError:
    from typing_extensions import NotRequired

I have not tested that.