Test method is inconclusive: Test wasn't run. Error?

Question

I have a test class and below I have posted a sample test from the test class

namespace AdminPortal.Tests.Controller_Test.Customer
{
    [TestClass]
    public class BusinessUnitControllerTests
    {
        private IBusinessUnitRepository _mockBusinessUnitRepository;
        private BusinessUnitController _controller;

        [TestInitialize]
        public void TestInitialize()
        {
            _mockBusinessUnitRepository = MockRepository.GenerateMock<IBusinessUnitRepository>();
            _controller = new BusinessUnitController(_mockBusinessUnitRepository);
        }

        [TestCleanup]
        public void TestCleanup()
        {
            _mockBusinessUnitRepository = null;

            _controller.Dispose();
            _controller = null;

        }

        #region Index Action Tests
        [TestMethod]
        public void Index_Action_Calls_GetAllBusinessUnit()
        {
            _mockBusinessUnitRepository.Stub(x => x.GetAllBusinessUnit());

            _controller.Index();

            _mockBusinessUnitRepository.AssertWasCalled(x=>x.GetAllBusinessUnit());
        }
    }
}

When I run the project I get following screen

I checked the references and the test project has the reference to main project. Any idea why the test are not running or saying that they were inconclusive?

Edit 1:

I saw a post here and changed my test's setting's default processor architecture to X64 but it still doesn't work.

Answer 1

Just in case none of the above options worked for anyone I fixed my instance of this error by noticing a corrupt entry in my App.Config due to a missing nuget package in the test project.