I honestly can't see any reason why not including test would somehow hinder the gains you keep post-cycle. Once you're in post-cycle, nearly all synthetic hormones should be flushed out. There isn't a homeopathic effect or anything; whether that hormone was trenbolone, testosterone, or superdrol is largely irrelevant at that point. The main factors that determine how much you retain is (a) your current body composition and (b) your pct. Furthermore there are some pretty potent orals out there that will be just as effective, if not more, at making muscle as most injectables.
The original brand name of oxandrolone was Anavar, which was marketed in the United States and the Netherlands .   This product was eventually discontinued and replaced in the United States with a new product named Oxandrin, which is the sole remaining brand name for oxandrolone in the United States.   Oxandrolone has also been sold under the brand names Antitriol ( Spain ), Anatrophill ( France ), Lipidex ( Brazil ), Lonavar ( Argentina , Australia , Italy ), Protivar, and Vasorome ( Japan ) among others.     Additional brand names exist for products that are manufactured for the steroid black market. 
Stop the cycle now bro, youve only ran it for a week so it wouldn't have damaged your endocrine system too bad. Orals are pretty suppressive so you might want to run a short PCT like a week. Then you need to research more into why you need testosterone such as Test E or C as a base and why you shouldnt run cycles too young, You wont achieve any gains off this cycle bro, everything you gain will come right off when you stop the cycle, even with a good PCT. which is why you should stop now and save yourself the time, effort and money and research more.