If you are still in school or a couple of years out of school, and your test scores are very good (i.e. 700 or above for GMATs, ??? for SATs), then, yes it is okay to include your test scores. In fact, some people may assume that if you do not include your test scores, then you scored below these thresholds. However, once you are more than a couple of years out of school, I personally think it is tacky to include test scores, regardless of how high you scored.