Tests are missing depending on Python interpreter

[bfrv]

Type: Bug

Behaviour

Depending on the selected Python Interpreter, some tests are missing from the Test Explorer.

Steps to reproduce:

1. Start a Python project
2. Add tests (under /tests/ and /tests/subfolder)

import pytest

def test_method() -> None:
    pass

@pytest.mark.parametrize(
    "arg",
    (1, 2, 3)
)
def test_parametrized_method(arg: int) -> None:
    pass

class TestClass:
    def test_class_method(self) -> None:
        pass

    @pytest.mark.parametrize(
        "arg",
        (1, 2, 3)
    )
    async def test_parametrized_class_method(self, arg: int) -> None:
        pass

3. Open the VSCode Test Explorer
4. Switch between Python interpreters

Example 1: Poetry (3.12.3):

Note that all tests are showing as expected

Example 2: Conda (3.12.4):

Note that:

• test_method tests are missing
• test_parametrized_method tests are missing
• test_parametrized_class_method tests are missing
• The TestClass nodes are missing (test_class_method tests are displayed as children of the test_test.py nodes)

The Python Output panel does show that pytest picks up all tests

2024-10-31 13:04:12.320 [info] ============================= test session starts ==============================
platform linux -- Python 3.12.4, pytest-6.2.5, py-1.11.0, pluggy-1.5.0

2024-10-31 13:04:12.323 [info] rootdir: /home/bart/temp/pytest
plugins: asyncio-0.15.1, flaky-3.7.0, mypy-testing-0.0.12, cov-5.0.0, mock-3.14.0, datadir-1.5.0, anyio-3.7.1

2024-10-31 13:04:12.332 [info] collected 16 items

<Package tests>
  <Module test_test.py>
    <Function test_method>
    <Function test_parametrized_method[1]>
    <Function test_parametrized_method[2]>
    <Function test_parametrized_method[3]>
    <Class TestClass>
        <Function test_class_method>
        <Function test_parametrized_class_method[1]>
        <Function test_parametrized_class_method[2]>
        <Function test_parametrized_class_method[3]>
<Package subfolder>
  <Module test_test.py>
    <Function test_method>
    <Function test_parametrized_method[1]>

2024-10-31 13:04:12.332 [info]     <Function test_parametrized_method[2]>
    <Function test_parametrized_method[3]>
    <Class TestClass>
        <Function test_class_method>
        <Function test_parametrized_class_method[1]>
        <Function test_parametrized_class_method[2]>
        <Function test_parametrized_class_method[3]>

2024-10-31 13:04:12.332 [info] ---: test_parametrized_method

2024-10-31 13:04:12.332 [info] ---: test_parametrized_method
---: test_parametrized_method

2024-10-31 13:04:12.333 [info] ---: test_parametrized_class_method

2024-10-31 13:04:12.333 [info] ---: test_parametrized_class_method
---: test_parametrized_class_method

2024-10-31 13:04:12.333 [info] ---: test_parametrized_method

2024-10-31 13:04:12.333 [info] ---: test_parametrized_method
---: test_parametrized_method

2024-10-31 13:04:12.333 [info] ---: test_parametrized_class_method

2024-10-31 13:04:12.333 [info] ---: test_parametrized_class_method
---: test_parametrized_class_method

2024-10-31 13:04:12.334 [info] 
========================= 16 tests collected in 0.01s ==========================
<<<PYTHON-EXEC-OUTPUT

Diagnostic data

Extension version: 2024.16.1
VS Code version: Code 1.94.2 (384ff7382de624fb94dbaf6da11977bba1ecd427, 2024-10-09T16:08:44.566Z)
OS version: Linux x64 6.8.0-47-generic snap
Modes:

• Python version (& distribution if applicable, e.g. Anaconda): 3.12.3
• Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Poetry
• Value of the python.languageServer setting: Default

User Settings

languageServer: "Pylance"

testing
• pytestEnabled: true

Installed Extensions

Extension Name	Extension Id	Version
autoDocstring - Python Docstring Generator	njpwerner.autodocstring	0.6.1
Black Formatter	ms-python.black-formatter	2024.4.0
Dev Containers	ms-vscode-remote.remote-containers	0.389.0
Docker	ms-azuretools.vscode-docker	1.29.3
Even Better TOML	tamasfe.even-better-toml	0.19.2
GitLab Workflow	GitLab.gitlab-workflow	5.17.0
GitLens — Git supercharged	eamodio.gitlens	15.6.2
Insert Unicode	brunnerh.insert-unicode	0.15.1
JavaScript Debugger	ms-vscode.js-debug	1.94.0
JavaScript Debugger Companion Extension	ms-vscode.js-debug-companion	1.1.3
Kubernetes	ms-kubernetes-tools.vscode-kubernetes-tools	1.3.18
Pylance	ms-python.vscode-pylance	2024.10.1
Python	ms-python.python	2024.16.1
Python Debugger	ms-python.debugpy	2024.12.0
Python Environment Manager	donjayamanne.python-environment-manager	1.2.4
Remote - SSH	ms-vscode-remote.remote-ssh	0.115.0
Remote - SSH: Editing Configuration Files	ms-vscode-remote.remote-ssh-edit	0.87.0
Remote - Tunnels	ms-vscode.remote-server	1.5.2
Remote Development	ms-vscode-remote.vscode-remote-extensionpack	0.26.0
Remote Explorer	ms-vscode.remote-explorer	0.4.3
rust-analyzer	rust-lang.rust-analyzer	0.3.2162
SVG	jock.svg	1.5.4
Swagger Viewer	Arjun.swagger-viewer	3.1.2
Table Visualizer for JavaScript Profiles	ms-vscode.vscode-js-profile-table	1.0.10
Tasks Shell Input	augustocdias.tasks-shell-input	1.12.4
Vue - Official	Vue.volar	2.1.10
WSL	ms-vscode-remote.remote-wsl	0.88.5
YAML	redhat.vscode-yaml	1.15.0

System Info

Item	Value
CPUs	13th Gen Intel(R) Core(TM) i7-13700H (20 x 2300)
GPU Status	2d_canvas: unavailable_software canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: disabled_software multiple_raster_threads: enabled_on opengl: disabled_off rasterization: disabled_software raw_draw: disabled_off_ok skia_graphite: disabled_off video_decode: disabled_software video_encode: disabled_software vulkan: disabled_off webgl: unavailable_software webgl2: unavailable_software webgpu: disabled_off webnn: disabled_off
Load (avg)	3, 3, 3
Memory (System)	31.02GB (7.07GB free)
Process Argv	--no-sandbox --force-user-env --crash-reporter-id 5610811c-82ac-49b0-bc5b-c52b6546f4c0
Screen Reader	no
VM	0%
DESKTOP_SESSION	ubuntu
XDG_CURRENT_DESKTOP	Unity
XDG_SESSION_DESKTOP	ubuntu
XDG_SESSION_TYPE	x11

A/B Experiments

vsliv368:30146709
vspor879:30202332
vspor708:30202333
vspor363:30204092
vscod805:30301674
binariesv615:30325510
vsaa593:30376534
py29gd2263:31024239
c4g48928:30535728
azure-dev_surveyonecf:30548226
962ge761:30959799
pythongtdpath:30769146
pythonnoceb:30805159
asynctok:30898717
pythonmypyd1:30879173
2e7ec940:31000449
pythontbext0:30879054
cppperfnew:31000557
dsvsc020:30976470
pythonait:31006305
dsvsc021:30996838
945dj816:31013170
dvdeprecation:31068756
dwnewjupyter:31046869
2f103344:31071589
impr_priority:31102340
nativerepl1:31139838
refactort:31108082
pythonrstrctxt:31112756
wkspc-onlycs-t:31132770
nativeloc2:31134642
wkspc-ranged-t:31151552
cf971741:31144450
iacca2:31156134
notype1cf:31157160
5fd0e150:31155592
dwcopilot:31170013

[eleanorjboyd]

will try this- can you confirm that pytest is installed in both environments and there are no difference in pytest plugins?

[github-actions]

Because we have not heard back with the information we requested, we are closing this issue for now. If you are able to provide the info later on, then we will be happy to re-open this issue to pick up where we left off.

Happy Coding!