debugging in unit tests has completely been disabled?

I've placed a break point here and trying to debug the following code snippet:

After clicking here and selecting debug, I am presented with a failed test:

What am I doing wrong? Why is it suddenly that I cannot debug my tests?

I'm referencing the following libraries:

using System;
using System.IO;
using System.Reflection;
using System.Text;
using MassTransit;
using MassTransit.Context;
using MassTransit.Serialization;
using NUnit.Framework;

I don't know if it matters, but I do have resharper:

I also have NUNIT installed, and although I do see it in extensions and I am able to reference it, I do not see it in my menus:

Also, as you can see I have the ability to set break points:

Why can I not debug my unit tests?