Paris St Germain celebrated their first Ligue 1 title in 19 years following a 1-0 win at Lyon.
Jeremy Menez's 53rd-minute strike was enough to end the capital club's long wait to reclaim the French crown and seal a first title since their big-spending Qatari owners took charge.
PSG's title will not, however, be confirmed until a league disciplinary panel meets to decide whether to impose a points deduction following allegations sporting director Leonardo barged a referee.
The Brazilian will front a hearing before the end of the season after he was charged for an incident that took place in the tunnel after PSG's 1-1 draw with Valenciennes at the Parc des Princes last weekend.
Reports have suggested PSG could be handed a two-point ban, with the club now seven points clear of nearest-rivals Marseille with two games to play.
Joey Barton's Marseille had ensured PSG's title party would have to wait until Sunday at least with a 2-1 victory over Toulouse at the Stade Velodrome 24 hours earlier.
An Andre Ayew brace either side of the break was enough to see off 10th-placed Toulouse and guarantee Champions League football for the hosts next season.