In 2015, Tolkacheva and the Russian group competed at the inaugural 2015 European Games, taking gold in group all-around and 5 ribbons. They ended their season by winning gold in Group all-around at the 2015 World Championships in Stuttgart, Germany, as well as gold in 6 Clubs/2 Hoops and silver in 5 Ribbons. At these Worlds, Russia finally regained the gold medal in the all-around competition, after eight years, the last time they won the group competition was at the 2007 World Championships held in Patras, Greece.