Copilot Agent cannot execute specific tests

[felipecrs]

Describe the bug

The extension is working fine. I can view all my tests and execute them from within the test view. I can also execute specific tests from there.

However, the Copilot Agent is unable to execute specific tests.

The request seems fine, but it always returns after Discovering tests... without executing any test (it works fine when it tries to execute all tests).

Then the Agent fallbacks to executing the test through different means, like using the terminal, which is more error-prone, less deterministic, and far less optimized for Agents.

Reproduction

https://github.com/vitest-dev/vitest/tree/main/examples

https://github.com/user-attachments/assets/3d8b447b-12aa-406c-a0e4-fc30df661485

Output

There is none, see the reproduction above.

Extension Version

1.32.1

Vitest Version

vitest/4.0.5 linux-x64 node-v24.11.0

Validations

• [x] Check that you are using the latest version of the extension
• [x] Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• [x] Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• [x] The provided reproduction is a minimal reproducible example of the bug.