I recently began working on the new implementation of the Azure Keyvault Emulator and created a heap of integration tests. As part of my build and release process I wanted to run something akin to:

dotnet test --verbosity minimal

but due to the tests requiring SSL connections my tests were failing with:

   System.Net.Http.HttpRequestException : The SSL connection could not be established, see inner exception.
---- System.Security.Authentication.AuthenticationException : The remote certificate is invalid because of errors in the certificate chain: UntrustedRoot

I tried a few solutions, including asking ChatGPT who dumped out a load of completely unworking code, but the following Just Worked™:

jobs:
  build-and-push:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout Repository
        uses: actions/checkout@v4

      - name: Setup .NET
        uses: actions/setup-dotnet@v3
        with:
          dotnet-version: '9.0.x'

      - name: Install SSL Certificates
        run: |
          dotnet dev-certs https --trust

      - name: Run Integration Tests
        run: |
          dotnet test --verbosity minimal

Super simple, you just need to:

• Set up the .NET action uses: actions/setup-dotnet@v3
• Use the dev-certs CLI tool to create and trust an SSL cert: dotnet dev-certs https --trust
• Then run your tests dotnet test --verbosity minimal