[dotnet-maestro]

This pull request updates the following dependencies

From https://github.com/microsoft/testfx

• Subscription: 6b3b8571-4059-4db5-9b07-cd5e649ae2cc
• Build: 20261109.7 (340534)
• Date Produced: November 9, 2026 8:49:41 PM UTC
• Commit: cb5805342d403ed9f7e7ddd116c81fee789ef7f9
• Branch: main

• Dependency Updates:
  • From 3.0.0-preview.26556.8 to 3.0.0-preview.26559.7
    • Microsoft.Testing.Platform
  • From 5.0.0-preview.26556.8 to 5.0.0-preview.26559.7
    • MSTest

[microsoft-github-policy-service]

Auto-approve

[Copilot]

🟢 Approval recommended

No active review issues are reported for the MSTest and Microsoft.Testing.Platform dependency update.

No open issues 🎉

What changed in this PR

Updates the repository’s MSTest and Microsoft.Testing.Platform dependencies to the November 9 upstream build, keeping version properties and dependency provenance aligned.

Changes:

• Updates MSTest to 5.0.0-preview.26559.7 and Microsoft.Testing.Platform to 3.0.0-preview.26559.7.
• Updates both dependency commit references to cb5805342d403ed9f7e7ddd116c81fee789ef7f9.

File	Description
eng/​Versions.props	Updates the MSTest and Microsoft.Testing.Platform version properties.
eng/​Version.Details.xml	Records matching dependency versions and upstream commit references.

_{Review effort: Balanced}

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[github-actions]

Final test-triage resolution — Azure Pipelines build 1672135

Triggering check: microsoft.testfx (Build Windows Release).

Resolution: no test failure to triage. This leg failed in the Build task with compile-time analyzer errors (IDE0004: Cast is redundant), for example in:

• TestHostExecutionOrchestratorMiddlewarePipelineTests.cs (line 729)
• TestHostControllersTestHostFinalizationTests.cs (line 418)
• MtpServerClientInProcessTests.cs (lines 76 and 340)

The build stopped before any tests ran. The normalized test results, retry history, crash/hang diagnostics and historical data are all empty. The evidence is complete (evidenceIncomplete=false), so this is not a test, flakiness, crash or slowness problem.

Next step: remove the redundant casts at the reported locations, then rebuild. Ordinary build failures are owned by Build Failure Analysis, not this triage. No issue was created.

🤖 Automated content by GitHub Copilot. Generated by the Pipeline Test Triage workflow. · copilot · auto · ~24 AIC · ⌖ ~1 AIC · ⊞ 10.1K

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Copilot review overview

No open issues 🎉

_{Review effort: Lite}

[github-actions]

🧪 Test quality review — PR #12300

Compared merge base ebe065a133d6beac1b57e72f6419f21595c8577b with head ec207e9caffda8b68fac1a2c3f2d5c7a3f9063ee. Evidence applies to this head, not every intermediate commit.

Test-value evidence

Contract	Scenario / oracle	Test / assertion	Counterfactual	Status
MSTest/MTP preview bump (eng/Versions.props, Version.Details.xml)	Dependency version change; no behavior authored in repo	n/a	n/a	Not applicable (dependency update)
Assert.IsNotNull((object?)x) → Assert.IsNotNull(x) in 4 places	Behavior-preserving; the new MSTest IsNotNull overload makes the object cast workaround unnecessary. Same null check, same oracle.	ShutdownServer_CancellationRegistration_UsesOnlyTheRemainingVi..., LaunchInProcessAsync_CallbackIsCanceledBeforeConnecting_Preser..., ControllerIpc_UnsupportedRequestReachesFailFastAndRethrowsOrig..., RunAsync_NestedMiddlewareFault_DelayedAncestorCancellationStil...	Refactor: expected to pass before and after; null value would fail both forms	Static prediction only; compilation against 5.0.0-preview.26559.7 not executed here

No execution records were inspected; no red/green claim is made.

🧵 Parallel safety

STATUS: CLEAN (no assemblies with parallelization configuration changes; no changed lifecycle/shared-state code). The specialist's CLEAN rests on the change description rather than a line-by-line read, but the diff is four single-line assertion edits with no shared state, resource, or ordering impact.

Per-test assessment

Pseudo-mutation evidence below consists of static predictions, not executed mutation results.

Result	Quality	Test	Notes	How to improve
Pass	A (90–100)	mod MtpServerClientInProcessTests.ShutdownServer_CancellationRegistration_UsesOnlyTheRemainingVirtualTimeBudget	Only the null-check call form changed; assertion intent is unchanged.	None
Pass	A (90–100)	mod MtpServerClientInProcessTests.LaunchInProcessAsync_CallbackIsCanceledBeforeConnecting_Preserves...	Only the null-check call form changed; sibling assertions still pin message.	None
Pass	A (90–100)	mod TestHostControllersTestHostFinalizationTests.ControllerIpc_UnsupportedRequestReachesFailFastAndRethrowsOriginal...	Only the null-check call form changed; null-check precedes use of peer.	None
Pass	A (90–100)	mod TestHostExecutionOrchestratorMiddlewarePipelineTests.RunAsync_NestedMiddlewareFault_DelayedAncestorCancellationStillReachesLeaf	Only the null-check call form changed; guards outerDownstream before use.	None

Test method names are abbreviated where the full name could not be fully confirmed from the diff hunk headers; no inline findings were warranted.

<sub>This advisory review is heuristic and non-blocking.

Re-run the combined review with /review-tests, or only the parallel-safety specialist with /parallel-audit.</sub>

🤖 Automated content by GitHub Copilot. Generated by the Test Quality Review on PR (on open / sync) workflow. · copilot · auto · ~46 AIC · ⌖ ~1 AIC · ⊞ 8.1K