This test passes now. Use Extract Method on the indicated block.Then the test fails.

difficult-to-extract-method.cs

[TestMethod]
public void TestMethod1()
{
    var x = 0;
    Task.Run(() =>
    {
        Thread.Sleep(TimeSpan.FromSeconds(1));
        x++;
    });

    {
        // Extract Method start
        Thread.Sleep(TimeSpan.FromSeconds(2));
        Assert.AreEqual(1, x);
        // Extract Method end
    }
}