"We got flogged by Te Teko the week before and we had to prove something," he said.
"That is the best win we have had this season."
He said they had no training in the week leading up to the match because the grounds had been closed, but met early on Saturday to work on their scrum.
He said they were dominated in the scrum the week before and knew they needed to do better around set pieces.
"So we tidied up there and it was also our captain's blazer game [on Saturday]."
Marist captain and lock, Mike Lewis, played well on Saturday to bring up his 50 caps for the club.
Marist led 7-3 at halftime before pushing on to secure the important win. Uerata said they had some tough games ahead but were aiming for a spot in the top four this season.