They haven't been undergoing "hundreds of tests"- someone earlier said that figure skating is not as highly tested as swimming. If she was caught with a performance enhancing drug, most likely they figured out the testing schedule to taper down when they give it to her. If the story is true, that she got caught with a trace amount, then they made a mistake in figuring out when it would be eliminated by her system. That's how good doping regimes work, and if the story is true, because right now it is coming out, it is actually good evidence that they may be doping Sasha and Anna as well. Just because they evade testing doesn't mean that they aren't taking it. I like all three skaters, and perhaps Valieva was a new "protoype" for Russia to see how this drug works in a low tested sport and whether they can get away with it. It's definitely not her fault.