The Italian national champion got her late-season campaign off to a great start with victory at GP Plouay and is building up to rides at the road worlds and Euros.
This is Deignan's third win at Plouay, which she won in 2015 and 2017.
The unidentified rider had already passed the 6-day test, but the subsequent 3-day test proved positive.
Lizzie Armitstead takes Plouay win, and with it, a second consecutive overall World Cup title
The Rabo-Liv squad sweeps the podium in the final race, but Lizzie Armitstead collects the overall World Cup title
Emma Pooley solos to a second consecutive victory in the GP Plouay as Marianne Vos claims her third World Cup crown.