C# Dev Kit fails to discover tests on built DLLs

[captainsafia]

Type: Bug

Issue Description

C#DK fails to discover tests in the dotnet/aspnetcore repo when assemblies are built.

Steps to Reproduce

1. git clone --recursive https://github.com/dotnet/aspnetcore.git
2. cd aspnetcore
3. ./restore.sh/./restore.cmd
4. source activate.sh/. ./activate.ps1
5. cd src/OpenApi
6. code .
7. Command Prompt > .NET: Open Solution > OpenApi.slnf
8. Invoke test discovery from explorer.

Expected Behavior

Tests from test assemblies show up in explorer.

Actual Behavior

No tests show up.

Logs

Created Test Controller
Log verbosity: diagnostic
[diag] C# Dev Kit version: 1.30.28
[diag] Test Explorer version: 22
[diag] platform: darwin
[diag] arch: arm64
[diag] Testing Platform Protocol enabled: false
[diag] Build-on-Refresh disabled: false
[diag] Build-on-Run disabled: false
[diag] Auto-Discovery disabled: false
[diag] Diff enabled: true
[diag] Calling dotnet.findPath with context: {"acquireContext":{"version":"0.0","requestingExtensionId":"ms-dotnettools.csdevkit","architecture":"arm64","mode":"sdk","installType":"global"},"versionSpecRequirement":"greater_than_or_equal","rejectPreviews":false}
[diag] Found dotnet.exe at: /Users/captainsafia/git/aspnetcore/openapi-fixes/.dotnet/dotnet
Found global.json at /Users/captainsafia/git/aspnetcore/openapi-fixes/global.json
Initialized Test Explorer Server [77194]
Using vstest from dotnet sdk in [/Users/captainsafia/git/aspnetcore/openapi-fixes/.dotnet/sdk/10.0.100-preview.6.25272.112].
Test Store Folder: /Users/captainsafia/Library/Application Support/Code/User/workspaceStorage/86a739808811f12d479cca334c5960fa/ms-dotnettools.csdevkit
[diag] Test Store loaded from persistance: Yes
Test data store opened in 0.040 sec.
Test controller initialized.
Initialized project system provider.
Waiting for projects to be detected by Project System...
2 projects added, 0 changed, 0 removed.
Scheduling discovery: /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests.dll [Last modified: 7/9/2025, 1:05:06 PM]
Scheduling discovery: /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.Tests.dll [Last modified: 7/9/2025, 1:05:10 PM]
[diag] Poller added for project: /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests.dll
[diag] Poller added for project: /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.Tests.dll
No runSettingsPath configured. Falling back to default settings.
========== Starting test discovery ==========
[diag] File timestamp changed from 1/1/0001 12:00:00 AM to 7/9/2025 1:05:06 PM for /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests.dll
[diag] File timestamp changed from 7/9/2025 12:38:20 PM to 7/9/2025 1:05:10 PM for /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.Tests.dll
[diag] Grouped /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests.dll
/Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.Tests.dll : (VsTestConsoleRunner, , , False)
[diag] Test discovery settings for /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests.dll,/Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.Tests.dll:
 <RunSettings>
  <RunConfiguration>
    <CollectSourceInformation>true</CollectSourceInformation>
  </RunConfiguration>
  <DataCollectionRunSettings>
    <DataCollectors />
  </DataCollectionRunSettings>
</RunSettings>.
[diag] Test platform diagnostic logs disabled.
[xUnit.net 00:00:00.00] xUnit.net VSTest Adapter v2.8.2+699d445a1a (64-bit .NET 10.0.0-preview.6.25278.103)
No test is available in /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests.dll. Make sure that test discoverer & executors are registered and platform & framework version settings are appropriate and try again.
[xUnit.net 00:00:00.00] xUnit.net VSTest Adapter v2.8.2+699d445a1a (64-bit .NET 10.0.0-preview.6.25278.103)
No test is available in /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.Tests.dll. Make sure that test discoverer & executors are registered and platform & framework version settings are appropriate and try again.
Tests are available, running test discovery: /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests.dll
Tests are available, running test discovery: /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.Tests.dll
Skipping discovery, already scheduled: /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests.dll [7/9/2025, 1:05:06 PM]
[diag] Skipping discovery, no projects to discover
Skipping discovery, already scheduled: /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.Tests.dll [7/9/2025, 1:05:10 PM]
[diag] Skipping discovery, no projects to discover
0 tests discovered from /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests.dll;/Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.Tests.dll in 2533.0994 ms
[diag] No tests discovered. See troubleshooting guidance: https://code.visualstudio.com/docs/csharp/cs-dev-kit-faq#_why-are-my-tests-not-being-discovered-or-run-in-the-test-explorer
========== Test discovery finished: 0 Tests found in 2.5 sec ==========
No runSettingsPath configured. Falling back to default settings.
No runSettingsPath configured. Falling back to default settings.
Log verbosity changed to: trace
[trace] Polling /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests.dll
[trace] Polling /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.Tests.dll
[trace] Polling /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests.dll
[trace] Polling /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.Tests.dll
[trace] Polling /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests.dll
[trace] Polling /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.Tests.dll
[trace] Polling /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests.dll
[trace] Polling /Users/captainsafia/git/aspnetcore/openapi-fixes/artifacts/bin/Microsoft.AspNetCore.OpenApi.Tests/Debug/net10.0/Microsoft.AspNetCore.OpenApi.Tests.dll
No runSettingsPath configured. Falling back to default settings.

Environment information

VSCode version: 1.101.2
C# Extension: 2.84.19
Using OmniSharp: false

Dotnet Information

Host:
Version: 9.0.7
Architecture: arm64
Commit: 3c298d9f00
RID: osx-arm64

.NET SDKs installed:
No SDKs were found.

.NET runtimes installed:
Microsoft.AspNetCore.App 9.0.7 [/Users/captainsafia/Library/Application Support/Code/User/globalStorage/ms-dotnettools.vscode-dotnet-runtime/.dotnet/9.0.7arm64aspnetcore/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 9.0.7 [/Users/captainsafia/Library/Application Support/Code/User/globalStorage/ms-dotnettools.vscode-dotnet-runtime/.dotnet/9.0.7arm64aspnetcore/shared/Microsoft.NETCore.App]

Other architectures found:
None

Environment variables:
DOTNET_ROOT [/Users/captainsafia/git/aspnetcore/openapi-fixes/.dotnet]

global.json file:
Not found

Learn more:
https://aka.ms/dotnet/info

Download .NET:
https://aka.ms/dotnet/download

Visual Studio Code Extensions

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codetour	vsls-contrib	0.0.59	vsls-contrib.codetour-0.0.59
copilot	GitHub	1.341.0	github.copilot-1.341.0
copilot-chat	GitHub	0.28.5	github.copilot-chat-0.28.5
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csharp	ms-dotnettools	2.84.19	ms-dotnettools.csharp-2.84.19-darwin-arm64
docker	docker	0.12.0	docker.docker-0.12.0-darwin-arm64
docs-build	docsmsft	0.4.6	docsmsft.docs-build-0.4.6
EditorConfig	EditorConfig	0.17.4	editorconfig.editorconfig-0.17.4
github-vscode-theme	GitHub	6.3.5	github.github-vscode-theme-6.3.5
hexeditor	ms-vscode	1.11.1	ms-vscode.hexeditor-1.11.1
indent-one-space	usernamehw	1.0.0	usernamehw.indent-one-space-1.0.0
jupyter-keymap	ms-toolsai	1.1.2	ms-toolsai.jupyter-keymap-1.1.2
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mokka	Demenskiy	2.0.5	demenskiy.mokka-2.0.5
night-owl	sdras	2.1.1	sdras.night-owl-2.1.1
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powershell	ms-vscode	2025.2.0	ms-vscode.powershell-2025.2.0
remote-containers	ms-vscode-remote	0.421.0	ms-vscode-remote.remote-containers-0.421.0
remote-repositories	ms-vscode	0.42.0	ms-vscode.remote-repositories-0.42.0
remote-wsl	ms-vscode-remote	0.99.0	ms-vscode-remote.remote-wsl-0.99.0
remotehub	GitHub	0.64.0	github.remotehub-0.64.0
rest-client	humao	0.25.1	humao.rest-client-0.25.1
symbols	miguelsolorio	0.0.24	miguelsolorio.symbols-0.0.24
theme-dracula	dracula-theme	2.25.1	dracula-theme.theme-dracula-2.25.1
trxview	timheuer	0.2.20	timheuer.trxview-0.2.20
vscode-azurefunctions	ms-azuretools	1.17.3	ms-azuretools.vscode-azurefunctions-1.17.3
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vscode-containers	ms-azuretools	2.0.3	ms-azuretools.vscode-containers-2.0.3
vscode-dotnet-runtime	ms-dotnettools	2.3.6	ms-dotnettools.vscode-dotnet-runtime-2.3.6
vscode-github-actions	github	0.27.2	github.vscode-github-actions-0.27.2
vscode-icons	vscode-icons-team	12.13.0	vscode-icons-team.vscode-icons-12.13.0
vscode-jupyter-cell-tags	ms-toolsai	0.1.9	ms-toolsai.vscode-jupyter-cell-tags-0.1.9
vscode-jupyter-slideshow	ms-toolsai	0.1.6	ms-toolsai.vscode-jupyter-slideshow-0.1.6
vscode-pull-request-github	GitHub	0.112.0	github.vscode-pull-request-github-0.112.0
vscode-xml	redhat	0.29.0	redhat.vscode-xml-0.29.0-darwin-arm64
vscode-yaml	redhat	1.18.0	redhat.vscode-yaml-1.18.0
vsliveshare	ms-vsliveshare	1.0.5948	ms-vsliveshare.vsliveshare-1.0.5948
vsliveshare-pack	ms-vsliveshare	0.4.0	ms-vsliveshare.vsliveshare-pack-0.4.0

Extension version: 1.30.28
VS Code version: Code 1.101.2 (2901c5ac6db8a986a5666c3af51ff804d05af0d4, 2025-06-24T20:27:15.391Z)
OS version: Darwin arm64 24.5.0
Modes:

System Info

Item	Value
CPUs	Apple M2 Max (12 x 2400)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: enabled_on direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: enabled_on video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	7, 8, 9
Memory (System)	64.00GB (5.32GB free)
Process Argv	. --crash-reporter-id 564dfdb0-e8e3-47c2-81f4-4214e191431e
Screen Reader	no
VM	0%

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azure-dev_surveyone:30548225
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[peterwald]

I have merged a fix for this issue. The idea is to no longer skip discovery when a build is in progress. Instead we rely on timestamps and the build queue to deduplicate.

[JakeRadMSFT]

I think this is fixed? I'm able to discover tests?

[captainsafia]

I tried to validate this with the latest pre-release and VS Code insiders. I'm running into a new error mode that seems related to initialization?

Version: 1.103.0-insider (Universal)
Commit: 6a5d9aa7f4ef25927b333f0228933a5387cb6501
Date: 2025-07-23T05:03:48.200Z (12 hrs ago)

2025-07-23 10:26:02.550 [info] Starting Spawn .NET server...
2025-07-23 10:26:02.550 [info] Using dotnet resolution provided by ".NET Install Tool".
2025-07-23 10:26:02.553 [info] Starting opening a solution...
2025-07-23 10:26:02.553 [info] Starting processing the solution file "/Users/captainsafia/git/aspnetcore/oas-refactor/src/OpenApi/OpenApi.slnf" in Dev Kit server...
2025-07-23 10:26:04.951 [info] Using acquired .NET runtime at "/Users/captainsafia/Library/Application Support/Code - Insiders/User/globalStorage/ms-dotnettools.vscode-dotnet-runtime/.dotnet/9.0.7~arm64~aspnetcore/dotnet"
2025-07-23 10:26:04.961 [info] .NET Sdk found: "/Users/captainsafia/git/aspnetcore/oas-refactor/.dotnet/dotnet".
2025-07-23 10:26:05.071 [info] Project system hosting process will use runtime installed in SDK.
2025-07-23 10:26:06.227 [info] .NET server started and IPC established in 1155ms
2025-07-23 10:26:06.228 [info] Completed Spawn .NET server (3679ms)
2025-07-23 10:26:07.021 [info] Completed processing the solution file "/Users/captainsafia/git/aspnetcore/oas-refactor/src/OpenApi/OpenApi.slnf" in Dev Kit server (4468ms)
2025-07-23 10:26:07.023 [info] Starting restoring NuGet packages...
2025-07-23 10:26:07.023 [info] Selected configuration: <Default>, active configuration: Debug|Any CPU
2025-07-23 10:26:07.023 [info] Completed opening a solution (4469ms)
2025-07-23 10:26:07.024 [info] Starting command: "/Users/captainsafia/git/aspnetcore/oas-refactor/.dotnet/dotnet" restore /Users/captainsafia/git/aspnetcore/oas-refactor/src/OpenApi/../../AspNetCore.slnx --interactive...
2025-07-23 10:26:07.547 [info] Starting Query for all projects...
2025-07-23 10:26:07.607 [info] Failed to listen to project initialization status: Error: Activating the "Microsoft.VisualStudio.ProjectSystem.ProjectInitializationStatusService (0.1)" service failed.
2025-07-23 10:26:08.302 [info] Failed at 'Query for all projects' (755ms) with error: Error: Activating the "Microsoft.VisualStudio.ProjectSystem.Query.Remoting.QueryExecutionService (0.3)" service failed.
2025-07-23 10:26:24.819 [info] Completed command: "/Users/captainsafia/git/aspnetcore/oas-refactor/.dotnet/dotnet" restore /Users/captainsafia/git/aspnetcore/oas-refactor/src/OpenApi/../../AspNetCore.slnx --interactive (17796ms)
2025-07-23 10:26:24.820 [info] Completed restoring NuGet packages (17797ms)
2025-07-23 10:26:30.477 [info] Failed to subscribe to active projects: Error: Activating the "Microsoft.VisualStudio.ProjectSystem.Query.Remoting.QueryExecutionService (0.3)" service failed.
2025-07-23 10:26:38.632 [info] Starting opening a solution...
2025-07-23 10:26:38.632 [info] Starting processing the solution file "/Users/captainsafia/git/aspnetcore/oas-refactor/src/OpenApi/OpenApi.slnf" in Dev Kit server...
2025-07-23 10:26:38.632 [info] Starting closing any previously opened solution...
2025-07-23 10:26:38.637 [info] Completed closing any previously opened solution (6ms)
2025-07-23 10:26:38.721 [info] Completed processing the solution file "/Users/captainsafia/git/aspnetcore/oas-refactor/src/OpenApi/OpenApi.slnf" in Dev Kit server (90ms)
2025-07-23 10:26:38.722 [info] Starting restoring NuGet packages...
2025-07-23 10:26:38.722 [info] Selected configuration: <Default>, active configuration: Debug|Any CPU
2025-07-23 10:26:38.722 [info] Completed opening a solution (91ms)
2025-07-23 10:26:38.723 [info] Starting command: "/Users/captainsafia/git/aspnetcore/oas-refactor/.dotnet/dotnet" restore /Users/captainsafia/git/aspnetcore/oas-refactor/src/OpenApi/../../AspNetCore.slnx --interactive...
2025-07-23 10:26:39.307 [info] Failed to listen to project initialization status: Error: Activating the "Microsoft.VisualStudio.ProjectSystem.ProjectInitializationStatusService (0.1)" service failed.
2025-07-23 10:26:55.202 [info] Completed command: "/Users/captainsafia/git/aspnetcore/oas-refactor/.dotnet/dotnet" restore /Users/captainsafia/git/aspnetcore/oas-refactor/src/OpenApi/../../AspNetCore.slnx --interactive (16479ms)
2025-07-23 10:26:55.202 [info] Completed restoring NuGet packages (16480ms)
2025-07-23 10:27:32.264 [info] Failed to subscribe to active projects: Error: Activating the "Microsoft.VisualStudio.ProjectSystem.Query.Remoting.QueryExecutionService (0.3)" service failed.
2025-07-23 10:27:57.583 [info] Failed to subscribe to active projects: Error: Activating the "Microsoft.VisualStudio.ProjectSystem.Query.Remoting.QueryExecutionService (0.3)" service failed.

Created Test Controller
Log verbosity: diagnostic
[diag] C# Dev Kit version: 1.40.25
[diag] Test Explorer version: 24
[diag] platform: darwin
[diag] arch: arm64
[diag] Testing Platform Protocol enabled: true
[diag] Build-on-Refresh disabled: false
[diag] Build-on-Run disabled: false
[diag] Auto-Discovery disabled: false
[diag] Diff enabled: true
[diag] Calling dotnet.findPath with context: {"acquireContext":{"version":"0.0","requestingExtensionId":"ms-dotnettools.csdevkit","architecture":"arm64","mode":"sdk","installType":"global"},"versionSpecRequirement":"greater_than_or_equal","rejectPreviews":false}
[diag] Found dotnet.exe at: /Users/captainsafia/git/aspnetcore/oas-refactor/.dotnet/dotnet
Found global.json at /Users/captainsafia/git/aspnetcore/oas-refactor/global.json
Initialized Test Explorer Server [1797]
Using vstest from dotnet sdk in [/Users/captainsafia/git/aspnetcore/oas-refactor/.dotnet/sdk/10.0.100-preview.7.25322.101].
Test Store Folder: /Users/captainsafia/Library/Application Support/Code - Insiders/User/workspaceStorage/15c759479bd3bb0d511d3281b813452c/ms-dotnettools.csdevkit
Test data store opened in 0.003 sec.
[diag] Test Store loaded from persistance: No
Test controller initialized.
Microsoft.ServiceHub.Framework.ServiceActivationFailedException: Activating the "Microsoft.VisualStudio.ProjectSystem.Query.Remoting.QueryExecutionService (0.3)" service failed.
 ---> StreamJsonRpc.RemoteInvocationException: Failed to start host 'dotnet.projectSystem$C94B8CFE-E3FD-4BAF-A941-2866DBB566FE'. Host exited with code '130' (ErrorKind: HostExited) (ErrorKind: HostExited HResult: 80131500)
   at StreamJsonRpc.JsonRpc.InvokeCoreAsync[TResult](RequestId id, String targetName, IReadOnlyList`1 arguments, IReadOnlyList`1 positionalArgumentDeclaredTypes, IReadOnlyDictionary`2 namedArgumentDeclaredTypes, CancellationToken cancellationToken, Boolean isParameterObject)
   at Microsoft.ServiceHub.Framework.RemoteServiceBroker.GetProxyAsync[T](ServiceRpcDescriptor serviceDescriptor, ServiceActivationOptions options, CancellationToken cancellationToken)
RPC server exception:
Microsoft.ServiceHub.Utility.HostCrashException: Failed to start host 'dotnet.projectSystem$C94B8CFE-E3FD-4BAF-A941-2866DBB566FE'. Host exited with code '130' (ErrorKind: HostExited) (ErrorKind: HostExited HResult: 80131500)
   
   --- End of remote stack trace --

   --- End of inner exception stack trace ---
   at Microsoft.ServiceHub.Framework.RemoteServiceBroker.GetProxyAsync[T](ServiceRpcDescriptor serviceDescriptor, ServiceActivationOptions options, CancellationToken cancellationToken)
   at Microsoft.VisualStudio.ProjectSystem.Query.Remoting.QueryClientExecutionEngine.GetExecutionServiceAsync(CancellationToken cancellationToken)
   at Microsoft.VisualStudio.ProjectSystem.Query.Remoting.QueryClientExecutionEngine.SubscribeAsync[TEntity](AsyncQueryable query, IObserver`1 resultsReceiver, IQueryExecutionRemoteContext remoteContext, CancellationToken cancellationToken)
   at Microsoft.VisualStudio.TestWindow.VSCode.ProjectSystemProvider.Service.ProjectSystemProviderService.<InitializeAsync>b__9_0()
   at Microsoft.VisualStudio.TestWindow.Logging.ILoggerExtensions.CallWithCatchAsync(IInternalLogger log, Func`1 func)
Initialized project system provider.
Waiting for projects to be detected by Project System...

[claudiaregio]

@captainsafia @JakeRadMSFT assigned for validation

[captainsafia]

I'm running into new issues when validating this on the latest preview. The project system seems to be the root cause here based on the logs:

Created Test Controller
Log verbosity: diagnostic
[diag] C# Dev Kit version: 1.41.5
[diag] Test Explorer version: 24
[diag] platform: darwin
[diag] arch: arm64
[diag] Testing Platform Protocol enabled: true
[diag] Build-on-Refresh disabled: false
[diag] Build-on-Run disabled: false
[diag] Auto-Discovery disabled: false
[diag] Diff enabled: true
[diag] Calling dotnet.findPath with context: {"acquireContext":{"version":"0.0","requestingExtensionId":"ms-dotnettools.csdevkit","architecture":"arm64","mode":"sdk","installType":"global"},"versionSpecRequirement":"greater_than_or_equal","rejectPreviews":false}
[diag] Found dotnet.exe at: /Users/captainsafia/git/aspnetcore/oas-refactor/.dotnet/dotnet
Found global.json at /Users/captainsafia/git/aspnetcore/oas-refactor/global.json
Initialized Test Explorer Server [50583]
Using vstest from dotnet sdk in [/Users/captainsafia/git/aspnetcore/oas-refactor/.dotnet/sdk/10.0.100-preview.7.25322.101].
Test Store Folder: /Users/captainsafia/Library/Application Support/Code - Insiders/User/workspaceStorage/15c759479bd3bb0d511d3281b813452c/ms-dotnettools.csdevkit
[diag] Test Store loaded from persistance: No
[diag] Task [refreshNodes:1143517789:1753392462420] started
Test data store opened in 0.057 sec.
[diag] Task [refreshNodes:1143517789:1753392462420] completed
Test controller initialized.
Microsoft.ServiceHub.Framework.ServiceActivationFailedException: Activating the "Microsoft.VisualStudio.ProjectSystem.Query.Remoting.QueryExecutionService (0.3)" service failed.
---> StreamJsonRpc.RemoteInvocationException: Failed to start host 'dotnet.projectSystem$C94B8CFE-E3FD-4BAF-A941-2866DBB566FE'. Host exited with code '130' (ErrorKind: HostExited) (ErrorKind: HostExited HResult: 80131500)
   at StreamJsonRpc.JsonRpc.InvokeCoreAsync[TResult](RequestId id, String targetName, IReadOnlyList`1 arguments, IReadOnlyList`1 positionalArgumentDeclaredTypes, IReadOnlyDictionary`2 namedArgumentDeclaredTypes, CancellationToken cancellationToken, Boolean isParameterObject)
   at Microsoft.ServiceHub.Framework.RemoteServiceBroker.GetProxyAsync[T](ServiceRpcDescriptor serviceDescriptor, ServiceActivationOptions options, CancellationToken cancellationToken)
RPC server exception:
Microsoft.ServiceHub.Utility.HostCrashException: Failed to start host 'dotnet.projectSystem$C94B8CFE-E3FD-4BAF-A941-2866DBB566FE'. Host exited with code '130' (ErrorKind: HostExited) (ErrorKind: HostExited HResult: 80131500)

   --- End of remote stack trace --

   --- End of inner exception stack trace ---
   at Microsoft.ServiceHub.Framework.RemoteServiceBroker.GetProxyAsync[T](ServiceRpcDescriptor serviceDescriptor, ServiceActivationOptions options, CancellationToken cancellationToken)
   at Microsoft.VisualStudio.ProjectSystem.Query.Remoting.QueryClientExecutionEngine.GetExecutionServiceAsync(CancellationToken cancellationToken)
   at Microsoft.VisualStudio.ProjectSystem.Query.Remoting.QueryClientExecutionEngine.SubscribeAsync[TEntity](AsyncQueryable query, IObserver`1 resultsReceiver, IQueryExecutionRemoteContext remoteContext, CancellationToken cancellationToken)
   at Microsoft.VisualStudio.TestWindow.VSCode.ProjectSystemProvider.Service.ProjectSystemProviderService.<InitializeAsync>b__9_0()
   at Microsoft.VisualStudio.TestWindow.Logging.ILoggerExtensions.CallWithCatchAsync(IInternalLogger log, Func`1 func)
Initialized project system provider.
Waiting for projects to be detected by Project System...
[diag] Task [refreshCmd:1143517789:1753392472726] started
No runSettingsPath configured. Falling back to default settings.
[diag] Task [refreshCmd:1143517789:1753392472726] completed