dotnet test failed integration test after new .net core sdk installed

Here is my xunit test project:

  <PropertyGroup>
    <TargetFramework>netcoreapp2.1</TargetFramework>
    <IsPackable>false</IsPackable>
  </PropertyGroup>

 <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.App" Version="2.1.1" />
    <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="2.1.0" />
    <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="2.1.0" />
    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.0" />
    <PackageReference Include="moq" Version="4.12.0" />
    <PackageReference Include="xunit" Version="2.4.0" />
    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.0" />
  </ItemGroup>

All was good up until I installed .NET Core 3.1 SDK, now all my integration tests failed. I checked in different machines as long as I have only .NET Core 2.1 every thing is good but by installing .NET Core 3.1 all integration tests failed.

Is there any config I should add to my project? It’s not an option for me to upgrade my project or test project to 3.1.

It seems it is a .net issue and not a xunit: https://github.com/xunit/xunit/issues/2066

[nohwnd]

That’s interesting could you post the actual failure please?

You can pin your dotnet version using global.json that way, you know what you will be invoking against. For example like this:

dotnet new globaljson --sdk-version 2.1.804

[sphinxy]

404 maybe because of https://stackoverflow.com/questions/43669633/why-is-testserver-not-able-to-find-controllers-when-controller-is-in-separate-as/