PSG host relegation battling Le Havre on Saturday
Lionel Messi's goal was cancelled out by Corentin Jean as PSG were left on 78 points, 16 ahead of second-placed Olympique de Marseille who will play their game in hand at Stade de Reims on Sunday.
PSG have now won eight of the last 10 Ligue 1 titles, having only been denied by Monaco in 2017 and Lille last year.
PSG equalled the record set by St Etienne, who won 10 top flight titles between 1957 and 1981.