Pietersen played for England on Tuesday in his first match since being dropped in August following the text message scandal which has dominated cricket headlines for much of the summer.
Bresnan has insisted that Pietersen's comeback seemed like nothing out of the ordinary.
He told BBC Sport: "It's pretty much business as usual. He's the same old Kev.
"Everyone in the know has sat down and spoken about it. But apart from that, for the rest of the boys, there's nothing exceptionally different.
"I'm pretty sure most of the lads in the dressing room were expecting it to be like that and that's what it was like."
Pietersen took a catch to give Bresnan the first of three wickets as India 'A' reached 369-9 at the close of a difficult day's play for England.