Rotherham manager Andy Scott was delighted with his team's improved home performance after they handed Accrington a 1-0 defeat.
The game was settled by a 27th-minute penalty from Shaun Harrad, his second goal in as many games, which came after Mark Bradley surged into the area and was felled by Bryan Hughes.
It was the Millers' second win on the bounce following Friday's 2-0 win at high-flying Southend, which puts them three points adrift of the play-offs.
"It was a big test for us because playing at home we haven't done too well, but after the result on Friday everyone was looking at us to see if we could back it up," Scott said.
"We won the game, got a clean sheet and another solid performance. I don't think they had a shot on our goal to be honest.
"We created a few chances, particularly in the first half and their keeper made a fantastic save in the second half."