From @WernerMairl on June 16, 2017 17:21

Not sure where i should post this issue (xUnit, VisualStudio, Cli) => please move on the right place
please advice if i can provide more/other informations/traces

Steps to reproduce

"Visual Studio Enterprise 2017 Preview (2) Version 15.3.0 Preview 2.0"
plus
https://dotnetcli.blob.core.windows.net/dotnet/Sdk/release/2.0.0-preview2/dotnet-sdk-latest-win-x64.exe

Expected behavior

Test Explorer should list some tests

Actual behavior

0 tests
no exception/additional messages in "Show Output from Tests"

Additional findings:

uninstalling dotnet cli Preview2
re-installing Preview 1 (2.0.0-preview1-005977)
solves the problem i can see all my tests- it looks like the problem correlates with preview 2
Not able to solve the problem by

• updateing nuget packages ,
• clear some VS-TestExtension Caches
  etc..

The same problem with two different projects => Preview1 working, Preview2 not working....
Attention: i'm using the newest VS 2017 Update "Preview 2" ....
But i had the same problem with the VS 2017 Preview 1!

My test.csproj is simple:
https://gist.github.com/WernerMairl/e8f2728d7717869c8ab3816c68fbe0a0

Pure cli "dotnet test" is working, the issue is about VS-Test Discovery!

Environment data

dotnet --info output:
dotnet --info
.NET Command Line Tools (2.0.0-preview2-006470)

Product Information:
Version: 2.0.0-preview2-006470
Commit SHA-1 hash: 4ea3671bbd

Runtime Environment:
OS Name: Windows
OS Version: 10.0.14393
OS Platform: Windows
RID: win10-x64
Base Path: C:\Program Files\dotnet\sdk\2.0.0-preview2-006470\

Microsoft .NET Core Shared Framework Host

Version : 2.0.0-preview2-25407-01
Build : 40c565230930ead58a50719c0ec799df77bddee9

Copied from original issue: dotnet/cli#6910