Resharper fails to run classes with async methods

xunit-and-resharper-async-tests.cs

using System;
using System.Threading.Tasks;
using Xunit;

namespace XUnitTestProject1
{
    public class Works
    {
        [Fact]
        public void Test1()
        {
            Assert.Equal(4, 2 + 2);
        }
    }

    public class DoesntWork
    {
        [Fact]
        public void Test1()
        {
            // even though this isn't async all it takes is a test that is async
            // to bork up the whole fixture
            Assert.Equal(4, 2 + 2);
        }

        [Fact]
        public async Task Test2()
        {
            Assert.Equal(4, 2 + 2);
        }
    }
}