Troyes ended their two-year exile from Ligue 1 by beating Angers 2-1 to achieve promotion from the second tier on Tuesday.
Jean-Marc Furlan s men did things the hard way after falling behind to Abdoul Camara s 31st-minute strike, while Mory Kone s red card after the break left them with 10 men at the Stade de l Aube.
But Benjamin Nivet s penalty shortly after the hour mark restored parity for the hosts, before Henri Bienvenu Ntsama s 84th-minute winner meant the corks could be popped in the Champagne region.
Troyes were relegated from Ligue 1 in 2013, but the win over their fellow promotion hopefuls means they can no longer be caught by fourth-placed Dijon.