Discovered pytests are not loaded into test explorer

[jbhannah]

Type: Bug

Behaviour

When opening a Python project that uses pytest, the Test Explorer panel never displays the results of the pytest collection command. The loading indicator continues moving, and the Refresh Tests button only reports to the console that test discovery is already in progress. Rolling back to extension version 2024.22.0 when opted-into the pythonTestAdapter experiment, or opting-out of the pythonTestAdapter experiment in version 2024.22.1, fixes the issue.

Steps to reproduce:

1. Install the ms-python.python extension version 2024.22.1.
2. Opt into the pythonTestAdapter experiment.
3. Load a Python project that uses pytest.

Diagnostic data

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

2024-12-23 23:00:03.352 [info] Experiment 'pythonTestAdapter' is active
2024-12-23 23:00:03.352 [info] Experiment 'pythonRecommendTensorboardExt' is active
2024-12-23 23:00:03.352 [info] Experiment 'pythonTerminalEnvVarActivation' is active
2024-12-23 23:00:03.352 [warning] Dir "/Users/jbhannah/Code/src/github.com/budgeapp/budge/.pixi/envs" is not watchable (directory does not exist)
2024-12-23 23:00:03.358 [info] Python interpreter path: ./.venv/bin/python
2024-12-23 23:00:03.687 [info] > pyenv which python
2024-12-23 23:00:03.687 [info] cwd: .
2024-12-23 23:00:03.945 [info] > conda info --json
2024-12-23 23:00:04.128 [info] > . ./.venv/bin/activate.fish && echo 'e8b39361-0157-4923-80e1-22d70d46dee6' && python ~/.vscode/extensions/ms-python.python-2024.22.1-darwin-arm64/python_files/printEnvVariables.py
2024-12-23 23:00:04.128 [info] shell: fish
2024-12-23 23:00:04.208 [info] > /usr/bin/python3 ~/.vscode/extensions/ms-python.python-2024.22.1-darwin-arm64/python_files/printEnvVariables.py
2024-12-23 23:00:04.209 [info] shell: fish
2024-12-23 23:00:04.279 [info] Setting environment variable VIRTUAL_ENV_PROMPT in collection to budge {"applyAtShellIntegration":true,"applyAtProcessCreation":true}
2024-12-23 23:00:04.279 [info] Prepending environment variable PATH in collection to /Users/jbhannah/.vscode/extensions/ms-python.python-2024.22.1-darwin-arm64/python_files/deactivate/fish:/Users/jbhannah/Code/src/github.com/budgeapp/budge/.venv/bin:/Users/jbhannah/.rbenv/shims:/Applications/Postgres.app/Contents/Versions/latest/bin:/Users/jbhannah/Code/bin:/Users/jbhannah/.local/state/fnm_multishells/30763_1735023604148/bin:/Users/jbhannah/.cargo/bin:/Users/jbhannah/.local/bin:/Users/jbhannah/.pub-cache/bin:/Users/jbhannah/.deno/bin:/Users/jbhannah/Library/Android/sdk/tools/bin:/Users/jbhannah/.bun/bin:/opt/homebrew/opt/ruby/bin:/opt/homebrew/bin:/opt/homebrew/sbin:/Users/jbhannah/.rbenv/shims:/Applications/Postgres.app/Contents/Versions/latest/bin:/Users/jbhannah/.jenv/shims:/Users/jbhannah/.jenv/shims:/Users/jbhannah/Code/bin:/Users/jbhannah/.local/state/fnm_multishells/2373_1735021339740/bin:/Users/jbhannah/.cargo/bin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/Library/Apple/usr/bin:/usr/local/share/dotnet:~/.dotnet/tools:/Library/TeX/texbin: {"applyAtShellIntegration":true,"applyAtProcessCreation":true}
2024-12-23 23:00:04.279 [info] Setting environment variable VIRTUAL_ENV in collection to /Users/jbhannah/Code/src/github.com/budgeapp/budge/.venv {"applyAtShellIntegration":true,"applyAtProcessCreation":true}
2024-12-23 23:00:04.279 [info] Setting environment variable _OLD_FISH_PROMPT_OVERRIDE in collection to /Users/jbhannah/Code/src/github.com/budgeapp/budge/.venv {"applyAtShellIntegration":true,"applyAtProcessCreation":true}
2024-12-23 23:00:04.279 [info] Setting environment variable FNM_MULTISHELL_PATH in collection to /Users/jbhannah/.local/state/fnm_multishells/30763_1735023604148 {"applyAtShellIntegration":true,"applyAtProcessCreation":true}
2024-12-23 23:00:04.279 [info] Setting environment variable MANPATH in collection to /usr/share/man:/usr/local/share/man:/Library/TeX/Distributions/.DefaultTeX/Contents/Man:/opt/homebrew/share/man {"applyAtShellIntegration":true,"applyAtProcessCreation":true}
2024-12-23 23:00:04.280 [info] Send text to terminal: /usr/bin/python3 /Users/jbhannah/.vscode/extensions/ms-python.python-2024.22.1-darwin-arm64/python_files/printEnvVariablesToFile.py /Users/jbhannah/.vscode/extensions/ms-python.python-2024.22.1-darwin-arm64/python_files/deactivate/fish/envVars.txt
2024-12-23 23:00:07.969 [info] Discover tests for workspace name: budge - uri: /Users/jbhannah/Code/src/github.com/budgeapp/budge
2024-12-23 23:00:07.969 [info] Running discovery for pytest using the new test adapter.
2024-12-23 23:00:08.039 [info] All environment variables set for pytest discovery: {"BUN_INSTALL":"/Users/jbhannah/.bun","COMMAND_MODE":"unix2003","EDITOR":"nvim","FNM_ARCH":"arm64","FNM_COREPACK_ENABLED":"false","FNM_DIR":"/Users/jbhannah/Library/Application Support/fnm","FNM_LOGLEVEL":"info","FNM_MULTISHELL_PATH":"/Users/jbhannah/.local/state/fnm_multishells/2373_1735021339740","FNM_NODE_DIST_MIRROR":"https://nodejs.org/dist","FNM_RESOLVE_ENGINES":"true","FNM_VERSION_FILE_STRATEGY":"local","FZF_ALT_C_COMMAND":"fd --type directory . $dir","FZF_CD_COMMAND":"fd --type directory . $dir","FZF_CD_WITH_HIDDEN_COMMAND":"fd --type directory --hidden . $dir","FZF_COMPLETE":"2","FZF_CTRL_T_COMMAND":"fd --type file --hidden . $dir","FZF_DEFAULT_COMMAND":"fd --type file --hidden . $dir","FZF_DEFAULT_OPTS":"--reverse --height=20","FZF_FIND_FILE_COMMAND":"fd --type file --hidden . $dir","FZF_LEGACY_KEYBINDINGS":"0","FZF_PREVIEW_DIR_CMD":"eza --group-directories-first -algh --color always","FZF_PREVIEW_FILE_CMD":"bat --color always --number","FZF_TMUX_OPTS":"-d 30%","GOPATH":"/Users/jbhannah/Code","HAXE_STD_PATH":"/opt/homebrew/lib/haxe/std","HOME":"/Users/jbhannah","HOMEBREW_CELLAR":"/opt/homebrew/Cellar","HOMEBREW_NO_ENV_HINTS":"1","HOMEBREW_PREFIX":"/opt/homebrew","HOMEBREW_REPOSITORY":"/opt/homebrew","INFOPATH":"/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info:/opt/homebrew/share/info","JENV_LOADED":"1","JENV_SHELL":"fish","LOGNAME":"jbhannah","LaunchInstanceID":"86B30646-B678-47F2-BF6D-86C0CA1417BF","MANPATH":"/usr/share/man:/usr/local/share/man:/Library/TeX/Distributions/.DefaultTeX/Contents/Man:/opt/homebrew/share/man","MallocNanoZone":"0","OP_PLUGIN_ALIASES_SOURCED":"1","ORIGINAL_XDG_CURRENT_DESKTOP":"undefined","PWD":"/","RBENV_SHELL":"fish","SECURITYSESSIONID":"186b4","SHELL":"/opt/homebrew/bin/fish","SHLVL":"1","SSH_AUTH_SOCK":"/Users/jbhannah/.1password/agent.sock","STARSHIP_SESSION_KEY":"5781276623106532","STARSHIP_SHELL":"fish","TMPDIR":"/var/folders/nv/pplgqy294y5064k53t0yvdfc0000gn/T/","TMUX_CONF":"/Users/jbhannah/.tmux.conf","TMUX_CONF_LOCAL":"/Users/jbhannah/.tmux.conf.local","TMUX_PROGRAM":"/opt/homebrew/bin/tmux","TZ":"America/Los_Angeles","USER":"jbhannah","VISUAL":"nvim","VSCODE_CODE_CACHE_PATH":"/Users/jbhannah/Library/Application Support/Code/CachedData/fabdb6a30b49f79a7aba0f2ad9df9b399473380f","VSCODE_CRASH_REPORTER_PROCESS_TYPE":"extensionHost","VSCODE_CWD":"/","VSCODE_ESM_ENTRYPOINT":"vs/workbench/api/node/extensionHostProcess","VSCODE_HANDLES_UNCAUGHT_ERRORS":"true","VSCODE_IPC_HOOK":"/Users/jbhannah/Library/Application Support/Code/1.96-main.sock","VSCODE_NLS_CONFIG":"{\"userLocale\":\"en-us\",\"osLocale\":\"en-us\",\"resolvedLanguage\":\"en\",\"defaultMessagesFile\":\"/Applications/Visual Studio Code.app/Contents/Resources/app/out/nls.messages.json\",\"locale\":\"en-us\",\"availableLanguages\":{}}","VSCODE_PID":"2364","XPC_FLAGS":"0x0","XPC_SERVICE_NAME":"application.com.microsoft.VSCode.312447736.312447742","__CFBundleIdentifier":"com.microsoft.VSCode","__CF_USER_TEXT_ENCODING":"0x1F5:0x0:0x0","ELECTRON_RUN_AS_NODE":"1","DEBUG":"WARN","VSCODE_L10N_BUNDLE_LOCATION":"","PATH":"/Users/jbhannah/.rbenv/shims:/Applications/Postgres.app/Contents/Versions/latest/bin:/Users/jbhannah/.jenv/shims:/Users/jbhannah/.jenv/shims:/Users/jbhannah/Code/bin:/Users/jbhannah/.local/state/fnm_multishells/2373_1735021339740/bin:/Users/jbhannah/.cargo/bin:/Users/jbhannah/.local/bin:/Users/jbhannah/.pub-cache/bin:/Users/jbhannah/.deno/bin:/Users/jbhannah/Library/Android/sdk/tools/bin:/Users/jbhannah/.bun/bin:/opt/homebrew/opt/ruby/bin:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/Library/Apple/usr/bin:/usr/local/share/dotnet:~/.dotnet/tools:/Library/TeX/texbin","PYTHONPATH":"/Users/jbhannah/.vscode/extensions/ms-python.python-2024.22.1-darwin-arm64/python_files","TEST_RUN_PIPE":"/var/folders/nv/pplgqy294y5064k53t0yvdfc0000gn/T/python-test-discovery-c91addae37ee66a71789"}
2024-12-23 23:00:08.054 [info] > . ./.venv/bin/activate && echo 'e8b39361-0157-4923-80e1-22d70d46dee6' && python ~/.vscode/extensions/ms-python.python-2024.22.1-darwin-arm64/python_files/printEnvVariables.py
2024-12-23 23:00:08.054 [info] shell: bash
2024-12-23 23:00:08.092 [info] > ./.venv/bin/python -m pytest -p vscode_pytest --collect-only tests --rootdir=.
2024-12-23 23:00:08.092 [info] cwd: .
2024-12-23 23:00:08.249 [info] ============================= test session starts ==============================
platform darwin -- Python 3.13.1, pytest-8.3.4, pluggy-1.5.0

2024-12-23 23:00:08.256 [info] rootdir: /Users/jbhannah/Code/src/github.com/budgeapp/budge
configfile: pyproject.toml
plugins: cov-6.0.0

2024-12-23 23:00:08.276 [info] collected 16 items

<Dir budge>
  <Dir tests>
    <Dir budge>
      <Module test_account.py>
        <Class TestAccount>
          <Function test_balance>
          <Function test_balance_as_of_future>
          <Function test_transactions_range>
          <Function test_daily_balance_past>
          <Function test_daily_balance_future>
      <Module test_collection.py>
        <Function test_add_item>
        <Function test_add_multiple_items>
        <Function test_add_item_already_in_other_collection>
        <Function test_remove_item>
        <Function test_remove_item_not_in_collection>
        <Function test_discard_item>
        <Function test_pop_item>
        <Function test_clear_collection>
      <Module test_date.py>
        <Function test_daterange>
      <Module test_transfer.py>
        <Class TestTransfer>
          <Function test_transfer>
        <Class TestRepeatingTransfer>
          <Function test_repeating_transfer>

2024-12-23 23:00:14.352 [info] Starting Pylance language server.
2024-12-23 23:00:38.717 [info] Discover tests for workspace name: budge - uri: /Users/jbhannah/Code/src/github.com/budgeapp/budge
2024-12-23 23:00:38.717 [info] Running discovery for pytest using the new test adapter.
2024-12-23 23:00:38.717 [error] Test discovery already in progress, not starting a new one.

Extension version: 2024.22.1
VS Code version: Code 1.96.2 (fabdb6a30b49f79a7aba0f2ad9df9b399473380f, 2024-12-19T10:22:47.216Z)
OS version: Darwin arm64 24.2.0
Modes:

System Info

Item	Value
CPUs	Apple M1 Max (10 x 2400)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: enabled_on 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: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	4, 8, 13
Memory (System)	32.00GB (3.67GB free)
Process Argv	--enable-proposed-api flexpilot.flexpilot-vscode-extension --log flexpilot.flexpilot-vscode-extension=debug --crash-reporter-id 46bcaca3-e957-4afa-a616-9447f1127fb3
Screen Reader	no
VM	0%

[benglewis]

I am also seeing this and can provide further diagnostics if necessary

[LichKing-2234]

Same issue

[pmpetit]

is it possible to remove and install a previous version ?

[brianoflondon]

This just started for me an hour ago, not sure when I even upgraded.

For anyone else: on the Uninstall box on the extension page you can chose a dropdown which gives you the option to Install a Specific Version.

2024.22.0 - working

2024.22.1 - not working and none of the pre-releases seem to be working either.

UPDATE: make sure you turn off Auto Update (I think it does this automatically).

[brianoflondon]

I tried to install this specific version 2024.22.0 and it still doesn't work for me :(

Make sure you restart Extensions after changing to a different version.

[eleanorjboyd]

see #24656, apologies for this issue