They had threatened to do it and according to cyclingnews it appears they have because of this.
http://www.velonews.com/tour2007/news/articles/12808.0.html
http://www.velonews.com/tour2007/news/articles/12808.0.html
T-Mobile rider Patrik Sinkewitz reacted in amazement on Wednesday after he was informed he had failed a doping test as he prepared for the tour de France last month.
The German Cycling Federation (BDR) announced on Wednesday that the 26-year old's A sample, taken on June 8, had a raised testosterone level and he must now decide if his B sample will be tested.
The up and coming rider has been suspended by his team who say that if the B sample confirms the first test then he will be sacked.
Sinkewitz was forced to pull out of the Tour de France after suffering a broken nose and shoulder injury on Sunday after colliding with a spectator when occupying 50th place in the overall standings.