Test Coverage UI running forever in some projects

[alanwilter]

Type: Bug

I can't really show an example. I have two projects here:

• one works fine, I click on "Run Tests With Coverage" and the decorators show up when all tests finish.
• in another project, I see TEST RESULTS finishing in a few seconds but the Decorators never come, the time counting keeps going forever. However, when I click to stop it (on the UI icon), it shows the decorators.

Extension version: 2025.16.0
VS Code version: Code 1.105.1 (7d842fb85a0275a4a8e4d7e040d2625abbf7f084, 2025-10-14T22:33:36.618Z)
OS version: Darwin arm64 25.0.0
Modes:

• Python version (& distribution if applicable, e.g. Anaconda): 3.12.11
• Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Pyenv
• Value of the python.languageServer setting: Pylance

User Settings

languageServer: "Pylance"

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

terminal
• launchArgs: "<placeholder>"

experiments
• optInto: ["pythonTestAdapter"]
• optOutFrom: ["pythonTerminalEnvVarActivation"]

Installed Extensions

Extension Name	Extension Id	Version
amazon-q-vscode	ama	1.102.0
aws-toolkit-vscode	ama	3.82.0
base64viewer	Jas	1.5.2
bun-vscode	ove	0.0.31
code-spell-checker	str	4.2.6
codespaces	Git	1.17.5
continue	Con	1.2.10
copilot	Git	1.388.0
copilot-chat	Git	0.32.4
datawrangler	ms-	1.22.0
dbclient-jdbc	cwe	1.4.6
debugpy	ms-	2025.15.2025102001
dependi	fil	0.7.15
docker	doc	0.18.0
edit-with-shell	ryu	1.3.0
EditorConfig	Edi	0.17.4
even-better-toml	tam	0.21.2
font-preview	ctc	2.2.1
git-graph	mhu	1.30.0
githistory	don	0.6.20
gitlab-workflow	Git	6.51.1
gitlens	eam	17.6.2
go	gol	0.50.0
intellicode-api-usage-examples	Vis	0.2.9
java	red	1.47.0
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
live-server	ms-	0.4.16
lldb-dap	llv	0.2.18
makefile-tools	ms-	0.12.17
markdown-all-in-one	yzh	3.6.3
markdown-mermaid	bie	1.29.0
material-icon-theme	PKi	5.28.0
mypy-type-checker	ms-	2025.2.0
pdf	tom	1.2.2
pgformatter	bra	1.32.0
prettier-vscode	esb	11.0.0
preview-jp2	ana	0.0.4
python	ms-	2025.16.0
r	REd	2.8.6
r-syntax	REd	0.1.3
rainbow-csv	mec	3.23.0
remote-containers	ms-	0.427.0
remote-explorer	ms-	0.5.0
remote-server	ms-	1.5.3
remote-ssh	ms-	0.120.0
remote-ssh-edit	ms-	0.87.0
remote-wsl	ms-	0.104.3
ruff	cha	2025.28.0
rust-analyzer	rus	0.3.2667
shell-format	fox	7.2.8
shellcheck	tim	0.38.3
swift-vscode	swi	2.12.0
tinymist	myr	0.14.0
vscode-containers	ms-	2.2.0
vscode-conventional-commits	viv	1.26.0
vscode-coverage-gutters	rya	2.14.0
vscode-duplicate	mrm	1.2.1
vscode-edit-csv	jan	0.11.7
vscode-github-actions	git	0.28.0
vscode-h5web	h5w	0.2.0
vscode-icons	vsc	12.15.0
vscode-java-debug	vsc	0.58.3
vscode-java-test	vsc	0.43.2
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-mermaid-chart	Mer	2.5.3
vscode-pgsql	ms-	1.10.0
vscode-pull-request-github	Git	0.120.2
vscode-pylance	ms-	2025.9.1
vscode-tailscale	Tai	1.1.0
vscode-yaml	red	1.19.1
vscodeintellicode	Vis	1.3.2
vsliveshare	ms-	1.0.5959
zip-viewer	ada	3.18.0

System Info

Item	Value
CPUs	Apple M4 (10 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)	3, 3, 3
Memory (System)	16.00GB (0.14GB free)
Process Argv	yoshi
Screen Reader	no
VM	0%

[eleanorjboyd]

will try and repro- thanks