Wahab was part of the Pakistan squad that was hit by the spot-fixing scandal in 2010 after the fourth Test at Lords, which led to the suspension of captain Salman Butt and pace bowlers, Mohammad Asif and Mohammad Amir, followed by bans.
Wahab was also suspected of being involved in the spot-fixing racket when his footage was released by now defunct tabloid 'News of the World' with the Pakistani bookmaker, Mazhar Majeed.
"I don't think what happened in the past will affect us now. It is history now and I think the team is now just focused on doing well in the Champions Trophy," he told reporters at the national stadium.
"Those were difficult times for Pakistan cricket but the players have shown after that they are committed to presenting a positive image of Pakistan cricket to the world," he added.
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Wahab is among a list of pace bowlers who are presently being trained by Pakistan's legendary pacer, Wasim Akram, in a 10-day specialised camp at the National stadium.
"I am working hard on my outswinger but Wasim has great experience and he is focusing on teaching us how to make use of our run-up, the crease and the bouncer/slower ball in all three formats of the game," the pacer, who took five wickets on his test debut at the Oval in 2010, said.
"There are these small details he is talking about which otherwise we didn't pay attention to, like how to best use the new ball and that is great for all of us," he said.