Duffy jarred his knee after slipping in the Boxing Day defeat to Sheffield United and was withdrawn by Laws shortly afterwards.
However, Laws conceded that move was purely precautionary and expects Duffy to take his place in the struggling Iron's starting XI at Prenton Park.
"He (Duffy) twisted his knee a little bit, but I would be very surprised if it keeps him out," Laws told the club's official website.
"We will have to look at him, everybody will be in for training on Thursday so we will see what the damage is then."
Duffy was not the only one to pick up an injury in the 3-0 loss to the Blades as captain Paul Reid left Bramall Lane with a cut under his eye.
Reid has been playing with a broken nose but Laws expects his skipper to soldier on once more.
- Sports & Recreation