XUnit tests not detected in Azure Pipeline in .NET Core 3.1

I recently started a new project using ASP.NET Core 3.1. The project consisted of am API project and a XUnit project with integration tests.

Everything was running just fine locally and I then added a YAML based Azure Pipeline for Continuous Integration. I used the standard YAML template ASP.NET Core (.NET Framework) from Azure DevOps which looks something like this.

# ASP.NET Core (.NET Framework)
# Build and test ASP.NET Core projects targeting the full .NET Framework.
# Add steps that publish symbols, save build artifacts, and more:
# https://docs.microsoft.com/azure/devops/pipelines/languages/dotnet-core

trigger:
- master

pool:
  vmImage: 'windows-latest'

variables:
  solution: '**/*.sln'
  buildPlatform: 'Any CPU'
  buildConfiguration: 'Release'

steps:
- task: NuGetToolInstaller@1

- task: NuGetCommand@2
  inputs:
    restoreSolution: '$(solution)'

- task: VSBuild@1
  inputs:
    solution: '$(solution)'
    msbuildArgs: '/p:DeployOnBuild=true /p:WebPublishMethod=Package /p:PackageAsSingleFile=true /p:SkipInvalidConfigurations=true /p:DesktopBuildPackageLocation="$(build.artifactStagingDirectory)\WebApp.zip" /p:DeployIisAppPath="Default Web Site"'
    platform: '$(buildPlatform)'
    configuration: '$(buildConfiguration)'

- task: VSTest@2
  inputs:
    platform: '$(buildPlatform)'
    configuration: '$(buildConfiguration)'

The pipeline ran just fine, but to my surprise none of the tests was detected resulting in an empty resultset.

Luckily there is a quick fix. Simply add a parameter specifying which framework to use when running this tests.

- task: VSTest@2
  inputs:
    testSelector: 'testAssemblies'
    codeCoverageEnabled: true
    testAssemblyVer2: |
      **\*tests.dll
      !**\*TestAdapter.dll
      !**\obj\**
    searchFolder: '$(System.DefaultWorkingDirectory)'
    otherConsoleOptions: '/Framework:.NETCoreApp,Version=3.1'

Also be sure that testAssemblyVer2 matches the name of your test assemblies. In my case its **\*tests.dll