A draw would save Colchester at the expense of the Iron, and Dunne believes his players are focused on the target.
"Scunthorpe can win as long as we pick up a positive result - and a positive result is what we're aiming for", he said.
"We've spoken about the game at training and, in a way, it's good that we have total clarity on what needs to happen.
"We've spoken about the game at training and, in a way, it's good that we have total clarity on what needs to happen.
"Although we didn't win last week, we got another point so that Scunthorpe have work to do against Swindon, and we have a good chance to make ourselves safe."