Norwich took advantage of defeats for Brentford and Swansea to move seven points clear at the top of the Championship with a 1-0 victory over Rotherham at Carrow Road.
Teemu Pukki's 15th goal of the season secured the Canaries a third consecutive win, leaving Rotherham two points from safety.
Second-placed Brentford, without 24-goal injured striker Ivan Toney, suffered a third consecutive loss after Coventry strengthened their survival hopes with a 2-0 win at St Andrew's.
Tyler Walker scored in each half, the first from the penalty spot, to move the Sky Blues five points clear of the bottom three.