Grant Hanley feels consistency has been the key to Rovers' impressive defensive form.
The clean-sheet against Nottingham Forest was their third in a row, and their ninth of the Championship season.
Having conceded just 18 goals in their 21 league games, Hanley admitted his delight at another shutout for the back-line, but frustration at claiming just a point.
"We've been working very hard," said the Scot.
"But that's not saying we didn't work hard last season, this year we've taken a lot of pride from it.
"We've had a run in the team where it's been a similar back four, or as close to it as well as the same goalkeeper.
"Especially in the defensive side of the game, the more you play together you can build relationships and you're only going to get better.
"Against Nottingham Forest we were disappointed not to get the win.
"It was a tough game and in the first-half we were brilliant and we were unlucky not to be ahead.
"In the second-half, Fode had a great chance, I know Steeley has made a save but I think we were a bit unlucky not to get the three points."