 After the triumph of the Conservatives and on the nomination of Antonio López de Santa Anna, in July 1855 he was consecrated bishop of Puebla, in the cathedral of Mexico City.In December 1855 he used funds of the diocese to aid the revolt of Antonio Haro y Tamariz, because the federal government had ordered the sale of some of the real estate of the diocese.After the Liberals returned to power in 1857, Labastida went into exile in Europe, where he supported the Conservative government.