Joshua will defend his IBF title for the second time in his career and Molina is the huge underdog for the clash at the Manchester Arena.
The fight will headline a packed card of British boxing and fireworks are expected, with Joshua hoping to extend winning run to 18 fights.
Molina insists he will test Joshua like no other opponent and he admits the Londoner will need to be at his best to win.
He told Sky Sports: "If he thinks he's going to have an easy night, that's even better for me, but I know it's going to be anything but that.
"I keep saying this to everyone. I don't think there will be anyone who will have an easy night against me. I don't think that's the fighter that I am anymore.
"If he slips up one bit, it's going to be a long night for him. In his mind, he's got to stay confident, but it's not going to be an easy night. As much as he's hoping for it, it ain't going to be that.
"I'm going to test a lot of things about Joshua that I think the people don't really understand. I'm going to test different things that people haven't seen in this fight."