Dual Prix de l'Arc de Triomphe victor Treve won the Grand Prix de Saint Cloud and remains on course for a record third Arc in October.
Jockey Thierry Jarnet calmly pushed out the mare, trained by Criquette Head-Maarek, to go clear of runner-up Flintshire, with Dolniya third.
The five-year-old was retired after her second Arc win but brought back into training in a bid to make history.
Victory at Saint-Cloud was her second win from two races this season.
Treve remains a general 5-2 favourite with bookmakers for the Arc, ahead of Derby winner Golden Horn (4-1) and Saturday's Irish Derby victor Jack Hobbs (7-1).
|Racing correspondent Cornelius Lysaght|
|She may not have won by miles, and for a stride it might have looked like the redoubtable Flintshire wasn't going to concede this time, but Treve's march back to Longchamp continues apace. Jarnet clearly wanted to ensure that the mare didn't have too hard a race, so just 'did enough'. What's clear - and bodes so well as the mare seeks racing history - is that compared to this time last year, when she was licking her wounds after two defeats, everything is looking absolutely A1 with her at the moment.|