Failing test.fails shows as failed instead of passed

Describe the bug

The test case below is expected to fail:

test.fails('expected to fail', async () => {
    await new Promise((resolve) => setTimeout(resolve, 200))
    expect(1 + 1).toBe(3)
})

However, running the test using the VS Code extension shows a red cross. Running the test using the vitest CLI correctly shows a green check mark.

The timeout is needed to reproduce the error, and it needs to be long enough to consistently reproduce it which I suspect is related to how vitest throttles updates.

I also tried to take a quick look at how VS Code handles test results and I think (?) this code that ignores requests to update the state of a test from failed to passed could be relevant.

Expected behavior

I expect a green check mark to appear for failing tests that are marked with fails, not a red cross. This would be consistent with how the vitest CLI displays results for tests marked with fails, see below:

> vitest
 ✓ test/basic.test.ts (1 test) 208ms
   ✓ expected to fail 207ms

 Test Files  1 passed (1)
      Tests  1 expected fail (1)
   Start at  10:06:38
   Duration  296ms (transform 7ms, setup 0ms, import 12ms, tests 208ms, environment 0ms)

Reproduction

https://github.com/danieladugyan/vitest-repro

Output

[INFO 9:55:17 AM] [v1.50.8] Vitest extension is activated because Vitest is installed or there is a Vite/Vitest config file in the workspace.
[INFO 9:55:17 AM] [API] Resolving configs: vitest-repro/vite.config.ts
[9:55:17 AM] [API] Spawning on-demand process...
[INFO 9:55:17 AM] [API] Running Vitest v4.1.11 (vitest-repro/vite.config.ts) with "/Users/user/.nvm/versions/node/v24.20.0/bin/node /Users/user/.vscode/extensions/vitest.explorer-1.50.8/dist/worker.js"
[9:55:17 AM] [API] Vitest WebSocket connection closed, cannot call RPC anymore.
[9:55:17 AM] [API] On-demand process finished in 527ms
[INFO 9:55:17 AM] [API] Watching vite.config.ts
[INFO 9:55:17 AM] [VSCODE] Watching vitest-repro with pattern **/*
[INFO 9:55:18 AM] [API] Collecting tests: test/basic.test.ts
[9:55:18 AM] [API] Spawning on-demand process...
[INFO 9:55:18 AM] [API] Running Vitest v4.1.11 (vitest-repro/vite.config.ts) with "/Users/user/.nvm/versions/node/v24.20.0/bin/node /Users/user/.vscode/extensions/vitest.explorer-1.50.8/dist/worker.js"
[9:55:18 AM] [API] Vitest WebSocket connection closed, cannot call RPC anymore.
[9:55:18 AM] [API] On-demand process finished in 169ms
[INFO 9:55:21 AM] [API] Running Vitest v4.1.11 (vitest-repro/vite.config.ts) with "/Users/user/.nvm/versions/node/v24.20.0/bin/node /Users/user/.vscode/extensions/vitest.explorer-1.50.8/dist/worker.js"
[9:55:21 AM] Enqueuing "expected to fail"
[INFO 9:55:21 AM] Running 1 file(s) with name pattern: ^\s?expected to fail$
[INFO 9:55:21 AM] [DECOR] Reset all decorations.
[9:55:21 AM] No task result for "basic.test.ts", ignoring
[9:55:21 AM] Enqueuing "expected to fail"
[9:55:21 AM] No errors found for "basic.test.ts"
[9:55:21 AM] Marking "expected to fail" as running (state is run)
[9:55:21 AM] Marking "expected to fail" as failed with 1 errors
[9:55:21 AM] Marking "expected to fail" as passed
[9:55:21 AM] No errors found for "basic.test.ts"
[9:55:21 AM] Ending test run test/basic.test.ts
[9:55:21 AM] Disposing test runner
[9:55:21 AM] [API] Vitest WebSocket connection closed, cannot call RPC anymore.

Extension Version

1.50.8

Vitest Version

4.1.11

Validations

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

Start with the reproduction in test/basic.test.ts and trace the result updates through the extension, especially the Vitest runner reference in packages/vitest/src/runtime/runner/run.ts and VS Code's testResult.ts. Reproduce the delayed test.fails case and verify that the extension ends with a green check mark, matching the Vitest CLI result.