No one is cleared of doping allegations until a rider is proven innocent. Wait for the B-sample to be tested.
Under World Anti-Doping Agency regulations, a ratio of testosterone to epitestosterone greater than 4:1 is considered a positive result and subject to investigation. The threshold was recently lowered from 6:1. The most likely natural ratio of testosterone to epitestosterone in humans is 1:1.
Testosterone is included as an anabolic steroid on WADA's list of banned substances, and its use can be punished by a two-year ban.