Informed sources close to the situation have reported the fight, which will take place on October 14 in Las Vegas.
Michel Pereira, 29, is riding a five-fight win streak, having won a split decision over Santiago Ponzinibbio in his last fight.
Marc-Andre Barrio, 33, has won two fights in a row, finishing Julian Marquez by technical knockout and defeating Erik Anders by unanimous decision. In doing so, he closed out a loss to Anthony Hernandez, to whom he lost by arm-triangle choke last September.