The much-changed Blues ran out 4-0 winners over Gillingham,Â with Ben Close, Matt Clarke, Brett Pitman and David Wheeler all getting on the scoresheet.
There was also a debut for Andre Green, while Joe Mason climbed off the bench to make a second-half bow.
A crowd of 2,011 were present to witness a Blues display which didn't quite click until the 41stÂ minute opener from Clarke.
But Jackett was pleased with how a side with 10 alterations then grew into the match to dominate.
He said: '˜ItÂ took us a little while to get into it, certainly 20-25 minutes where we didn't find any rhythm, but we defended well in that period and then grew as the game went on and the last hour we were strong.
'˜It's aÂ good result, four different scorers is very pleasing and by the end a deserved victory.
'˜There were a high number of changes, but so did Gillingham, and I'm pleased that, differently from Saturday, we came through the game with no injures.
'˜Brett scoring his first goal of the seasonÂ was good, he worked very hard and showed a good attitude and good body language, which is a big thing. These are things which you need to have and underpin all the quality you have.
'˜Also, when we got going, the two midfield players - Close and Rose '“Â did very well and got into the game and set up some good opportunities for us.'