The failed test just means that the drive had trouble finding tracks on the CD or DVD. It does not affect your computer or your games. Did you run the test because you were having trouble with your optical drive?
Try the test with a few different CD or DVD discs. If it passes, that means the original disc has problems, and your drive is probably fine. If the test fails no matter what disc you use, you might want to consider replacing the drive, but that depends on what you use the drive for. If the drive is still doing what you want it to, there's no hurry to replace it.