NUnit 2.5/RS 6 and abstract generic base class marks fixture as Inconclusive.

(Having trouble submitting code on youtrack since it won't parse properly in Opera when using {code} tags?)

I can't seem to run the TestValue() test any way. If I try to run "TestValue()" or "Test" fixture class I only get "Test: Inconclusive" in output.
Anyone knows if this is error due to bug in NUnit or due to RS?

    [TestFixture]
    public abstract class BaseTest<T>
    {
        protected abstract T GetValue();
        [Test]
        public void TestValue()
        {
            Assert.AreEqual(1, GetValue());
        }
    }
    [TestFixture]
    public class Test : BaseTest<int>
    {
        protected override int GetValue()
        {
            return 1;
        }
    }

Thanks.

*Edit: I've now also tested with NUnit 2.5.10.11092 with same behavior.