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Azure Pipelines - Unable to determine the location of vstest.console.exe

A colleague forwarded me a question about a failing build pipeline. When I took a look at the build results, I noticed that the Visual Studio Test task was failing.

Inside the logs I found more details explaining what was going on:

##[warning]No results found to publish.

##[debug]Processed: ##vso[task.logissue type=warning]No results found to publish.

##[error]System.Management.Automation.CmdletInvocationException: Unable to determine the location of vstest.console.exe ---> System.IO.FileNotFoundException: Unable to determine the location of vstest.console.exe

##[debug]Processed: ##vso[task.logissue type=error;]System.Management.Automation.CmdletInvocationException: Unable to determine the location of vstest.console.exe ---> System.IO.FileNotFoundException: Unable to determine the location of vstest.console.exe

   at Microsoft.TeamFoundation.DistributedTask.Task.Internal.InvokeVSTestCmdlet.GetVsTestLocation()

   at Microsoft.TeamFoundation.DistributedTask.Task.Internal.InvokeVSTestCmdlet.ProcessRecord()

   at System.Management.Automation.CommandProcessor.ProcessRecord()

   --- End of inner exception stack trace ---

   at System.Management.Automation.Runspaces.PipelineBase.Invoke(IEnumerable input)

   at System.Management.Automation.PowerShell.Worker.ConstructPipelineAndDoWork(Runspace rs, Boolean performSyncInvoke)

   at System.Management.Automation.PowerShell.Worker.CreateRunspaceIfNeededAndDoWork(Runspace rsToUse, Boolean isSync)

   at System.Management.Automation.PowerShell.CoreInvokeHelper[TInput,TOutput](PSDataCollection`1 input, PSDataCollection`1 output, PSInvocationSettings settings)

   at System.Management.Automation.PowerShell.CoreInvoke[TInput,TOutput](PSDataCollection`1 input, PSDataCollection`1 output, PSInvocationSettings settings)

   at Microsoft.TeamFoundation.DistributedTask.Handlers.LegacyVSTSPowerShellHost.VSTSPowerShellHost.Main(String[] args)

##[error]LegacyVSTSPowerShellHost.exe completed with return code: -1.

On the build server only the latest Visual Studio 2019 Build tools were installed. I noticed that he was still using an older Visual Studio Test Task version. This older version could only handle older Visual Studio version.

I changed it to the latest version:

Now I could select Visual Studio 2019(or latest)  as the Test platform version:

I triggered the build again and this time it succeeded.

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