[Fact]
public void Should_Test_Something()
{
    using (var mock = AutoMock.GetLoose())
    {
        using (var workflow = mock.Create<IWorkflow>())
        {
            workflow.DoSomething();
        }
    }
}

public interface IWorkflow
{
    void DoSomething();
}

public class Workflow : IWorkflow
{
    // ...
    public void DoSomething()
    {
        // I do something, a breakpoint set here does never get hit
    }
}