Teemu Pukki's 50th goal on his 100th appearance gave leaders Norwich a 2-1 win at Blackburn.
The Finn was the difference between the sides, firing the Canaries ahead with a clinical finish midway through a first half which they dominated and in which he also struck the woodwork.
Rovers deservedly levelled through a special Harvey Elliott goal shortly after the restart before the instinctive Pukki restored Norwich's advantage in the 65th minute.
It was harsh on Blackburn, who were in the midst of an onslaught on the Norwich goal and also struck the woodwork before and after the equaliser but were hit by a body blow from the Finn when on top.
Those instincts are vital in any promotion race and Pukki delivered once again, maintaining Norwich's three-point cushion at the summit, as they made it three wins on the bounce.
Blackburn still haven't defeated a side in the top half but will feel hard done by after rallying to get back in the game, with their three-match winning run at Ewood coming to an end.
Sam Gallagher's darting near-post header almost gave Rovers the perfect start but Michael McGovern's wonderful reflex save denied him before Josh Martin scuffed at goal and Pukki chipped tamely at Thomas Kaminski.
Pukki made no mistake in the 22nd minute when Tettey had space on the left and his cross found the Finn at the near post and he turned sharply before firing past Kaminski at the near post.
They should have extended their lead before the break when Emi Buendia's cross found Pukki in acres of space but his shot crashed back off the crossbar and Kaminski's leg blocked Jacob Sorensen's rebound.
Rovers came out all guns blazing after the restart, with Gallagher's 25-yard effort clattering the woodwork.
They got a deserved equaliser in the 59th minute through the impressive Elliott, who drove into the area, skipped easily beyond Grant Hanley before calmly slotting past McGovern from a tight angle for his third goal this season.
Norwich sucker-punched their hosts in the 65th minute, taking a lead they scarcely looked like regaining.
The Canaries broke forward and though Ryan Nyambe cleared, it fell as far as Buendia, whose speculative shot was re-directed by Pukki and completely wrong-footed Kaminski for his ninth goal of the season.
City saw out the game professionally afterwards and would have had a third but for Kaminski saving Marco Stiepermann's point-blank effort.