The Potters put six points between themselves and the relegation zone with a 2-0 victory over Queens Park Ranger last weekend, but the Welshman still believes that another win is needed to stave off the threat of relegation.
"We've been in a 'must-win game' situation for the last three or four matches now," Pulis told reporters. "We've four to go, and we need to get a result in one of those.
"The three points against QPR helped, but we still need to get to 40 points, which has been the target from the beginning of the season. I personally think we will be safe with 40, and our goal difference is good, so that's almost an extra point for us.
"The players got what they deserved last weekend. We needed those three points, but we still need three more, and until we get them no-one will be relaxing here."
Stoke take on Norwich City at the Britannia Stadium this afternoon.