memory leak after running Python tests #25641

Activity

1. vs-code-engineering commented on Dec 2, 2025

   

   vs-code-engineeringbot

   on Dec 2, 2025 – with VS Code Engineering

   More actions

   AI Translation:

   Title:

   When using the testing feature, window memory usage keeps increasing

   Body:

   Does this issue occur when all extensions are disabled?: Yes/No

   • VS Code Version: 1.106.3 (user setup)
   • OS Version: Windows_NT x64 10.0.26100

   Steps to Reproduce:

   1. Click Test -> Run a test (python, pytest)
   2. The window's memory usage keeps increasing. My tests are very long and may run for several days. Eventually, memory runs out and VS Code becomes unresponsive.
   3. Even after manually clicking to end the test, window memory usage remains high.

   
2. vs-code-engineering

   added

   triage-neededNeeds assignment to the proper sub-teamNeeds assignment to the proper sub-team

   on Dec 2, 2025
3. vs-code-engineering

   assigned

   Ulugbek Abdullaev (ulugbekna)

   on Dec 2, 2025
4. vs-code-engineering

   assigned

   Jonathan Carter (lostintangent)

   on Dec 9, 2025
5. Ulugbek Abdullaev (ulugbekna)

   assigned

   Connor Peet (connor4312)

   and unassigned

   Jonathan Carter (lostintangent)

   and

   Ulugbek Abdullaev (ulugbekna)

   on Dec 9, 2025
6. vs-code-engineering

   removed

   triage-neededNeeds assignment to the proper sub-teamNeeds assignment to the proper sub-team

   on Dec 9, 2025
7. Connor Peet (connor4312)

   assigned

   Eleanor Boyd (eleanorjboyd)

   and

   Connor Peet (connor4312)

   and unassigned

   Connor Peet (connor4312)

   and

   Eleanor Boyd (eleanorjboyd)

   on Dec 9, 2025
8. Connor Peet (connor4312)

   added

   bugIssue identified by VS Code Team member as probable bugIssue identified by VS Code Team member as probable bug

   on Dec 9, 2025
9. Eleanor Boyd (eleanorjboyd)

   added

   bugIssue identified by VS Code Team member as probable bugIssue identified by VS Code Team member as probable bug

   on Dec 9, 2025
10. Eleanor Boyd (eleanorjboyd)

    transferred this issue frommicrosoft/vscodeon Dec 9, 2025
11. github-actions

    added

    triage-neededNeeds assignment to the proper sub-teamNeeds assignment to the proper sub-team

    on Dec 9, 2025
12. github-actions

    unassigned

    Connor Peet (connor4312)

    on Dec 9, 2025
13. Eleanor Boyd (eleanorjboyd)

    added

    confirmation pendingThe issue needs to be confirmed through a maintainer reproducing the bug.The issue needs to be confirmed through a maintainer reproducing the bug.

    on Dec 9, 2025
14. anthonykim1 commented on Dec 10, 2025

    

    Anthony Kim (anthonykim1)

    on Dec 10, 2025

    More actions

    I think the user is stating there may be memory leak after running Python tests

    👍React with 👍1Reacted by Eleanor Boyd
15. Anthony Kim (anthonykim1)

    assigned

    Eleanor Boyd (eleanorjboyd)

    on Dec 10, 2025
16. Anthony Kim (anthonykim1)

    added

    area-testing

    and removed

    triage-neededNeeds assignment to the proper sub-teamNeeds assignment to the proper sub-team

    on Dec 10, 2025
17. Eleanor Boyd (eleanorjboyd)

    changed the title [-]使用测试功能时window占用内存会持续增加[/-] [+] memory leak after running Python tests[/+] on Dec 18, 2025
18. eleanorjboyd commented on Sep 23, 2026

    

    Eleanor Boyd (eleanorjboyd)

    on Sep 23, 2026

    Member

    More actions

    🤖 Thanks for the report. Could you confirm whether this still occurs on the latest VS Code and Python extension releases, and provide the Python extension, Python, and pytest versions; a minimal long-running test; whether the test produces continuous stdout/stderr; and the Python: Report Issue output? Please also identify which process grows in Developer: Open Process Explorer and, if possible, compare memory growth with pytest output suppressed. Issues marked info-needed automatically close after 30 days without a reply.
19. Eleanor Boyd (eleanorjboyd)

    added

    info-neededIssue requires more information from posterIssue requires more information from poster

    on Sep 23, 2026