This does not appear to fix it. I saw you updated Microsoft.NET.Test.Sdk to 17.13.0 in #2750, which is not the latest version. microsoft/vstest#2952 (comment) mentioned that a newer preview version fixed it for them. You could try updating to the latest version 17.14.1, unless that breaks things for some reason?

Yes, it seems not be resolved by increasing timeout.
And it need to investigate vstest diag logs for details.

a newer preview version fixed it for them. You could try updating to the latest version 17.14.1, unless that breaks things for some reason?

I'll try to newer versions on separate PR.
(Microsoft.NET.Test.Sdk depends on NewtonsoftJson. So it need to modify WithNuGet relating code to update to latest versions)

(Microsoft.NET.Test.Sdk depends on NewtonsoftJson. So it need to modify WithNuGet relating code to update to latest versions)

That's annoying. We can change those tests to use a different nuget package besides Newtonsoft.

Close this PR.
Test host process crashed issue is expected to be resolved by #2755

It seems Test host process crashed is not resolved by updating Microsoft.NET.Test.Sdk versions.
Because latest CI on master failed with this error.
https://github.com/dotnet/BenchmarkDotNet/actions/runs/15520368955

As far as I've confirmed.
This CI error started occurred from 3-weeks ago.
https://github.com/dotnet/BenchmarkDotNet/actions/runs/15117387191

So it expected not caused by recent NuGet package dependencies update.

I've updated .NET SDK version. (#2762)
But Test host process crashed issue seems still continued.

Failed CI logs
https://github.com/dotnet/BenchmarkDotNet/actions/runs/15535280088

The active test run was aborted. Reason: Test host process crashed.

It seems above error is still occurred on CI.
Error is raised when running DotMemoryTests of BenchmarkDotNet.IntegrationTests
And when error occurred. it seems some delay (about 5 seconds) is observed when detaching dotMemory.

Failed CI logs
https://github.com/dotnet/BenchmarkDotNet/actions/runs/16084412378/job/45393708556

2025-07-05T04:28:17.4559913Z Attaching dotMemory to the process...
2025-07-05T04:28:18.7868165Z dotMemory is successfully attached
2025-07-05T04:28:18.8034871Z WorkloadActual   1: 1 op, 37009.00 ns, 37.0090 us/op
2025-07-05T04:28:18.8035699Z Taking dotMemory snapshot...
2025-07-05T04:28:20.2047484Z dotMemory snapshot is successfully taken
2025-07-05T04:28:20.2047929Z Detaching dotMemory from the process...
2025-07-05T04:28:25.4637525Z dotMemory is successfully detached
2025-07-05T04:28:25.4638225Z WorkloadResult   1: 1 op, 37009.00 ns, 37.0090 us/op
2025-07-05T04:28:27.5299589Z The active test run was aborted. Reason: Test host process crashed