How to fail the build pipeline if "Tests Failed" in azure pipelines?

Question

I want to fail the build pipeline if a single test failed with azure pipelines.

Azure can successfully detect that my tests entered a failed state however it gives a success state to the entire build pipeline:

The question is how to make azure give a failed build state if the tests stage failed?

Here's my azure-pipelines.yml :

# Build ASP.NET Core project using Azure Pipelines
# https://docs.microsoft.com/azure/devops/pipelines/languages/dotnet-core?view=vsts

pool:
  vmImage: 'Ubuntu 16.04'

variables:
  buildConfiguration: 'Release'

steps:
- script: |
    dotnet build --configuration $(buildConfiguration)
    dotnet test dotnetcore-tests --configuration $(buildConfiguration) --logger trx
    dotnet publish --configuration $(buildConfiguration) --output $BUILD_ARTIFACTSTAGINGDIRECTORY

- task: PublishTestResults@2
  inputs:
    testRunner: VSTest
    testResultsFiles: '**/*.trx'

- task: PublishBuildArtifacts@1

Answer 1

The original answer didn't work for me, but it looks like there was a lot of discussion on this, and there's now a failTaskOnFailedTests param for the task. That seems to work.

- task: PublishTestResults@2
  inputs:
    testRunner: VSTest
    testResultsFiles: '**/*.trx'
    failTaskOnFailedTests: true

I'm still surprised this wasn't default behavior.