ReSharper no longer runs unit tests

Question

I'm trying to write some unit tests for an app I work on at work (In the vague hope that others might follow suit), and I was originally running these tests using NUnit and the ReSharper plugin.

However, ReSharper will no longer run tests for me for some reason: It simply crosses them out with a red strikeout.

There's no error code I'm afraid, and there's no mention of such behaviour on the JetBrains site.

Has anyone else experienced similar benhaviour?

Cheers, Ed

EDIT

An example of a test, just to show that I'm not just doing them wrong:

using NUnit.Framework;

/// <summary>
/// Test
/// </summary>
[TestFixture]
public class Test
{
    [Test]
    public void TestOne()
    {
        Assert.IsTrue(true);
    }
}

Not exactly much to go wrong in that example :D

Answer 1

Most probably you incidentally deleted [TestFixture], [Test] attributes, made the test methods private, or the test class private.

Please post some example code if the above is not the case (whole class including class declaration)