Wasps rugby director Dai Young said the club's performance against Worcester Warriors in the recent Aviva Premiership clash left a lot to be desired despite them winning it by 40-33.
The first half saw an even contest with Christian Wade crossing over twice for Wasps along with Will Rowlands while Worcester Warriors responding back with a double from Josh Adams and a touchdown from Bryce Heem.
However, Heem's sent-off at the start of the second half for a tackle on Willie le Roux changed the complexion of the game with Alapati Leiua, Josh Bassett and Brendan Macken scoring a try each.
Worcester Warriors came with a late resurgence in the final five minutes after Matt Mullan was sin-binned with tries from Biyi Alo and Jackson Willison but succumbed to a seven point defeat.
Young felt the performance against Worcester Warriors was a bit of reality check on the areas that needs improvement and urged the team to step up as they head for the European Champions Cup play-offs next week.
"It's a win and five points but there were very few areas of our game that pleased me.
"Worcester won nearly all the 50-50s and were first to react in terms of mind and deed and our performance didn't match the five points.
"Christian was probably the difference but I always thought that we could respond if we needed to as we probably had that extra bit of quality.
"It was a big message to us as we will have to be better against Leinster next week as they will match us for quality so we'll have to prove that we've got the belly for the fight."