Most small pickups fall short when it comes to protecting passengers seated in the rear, the latest crash test ratings from the Insurance Institute for Highway Safety show.

“Our updated moderate overlap front crash test proved to be challenging for small pickups,” said IIHS President David Harkey. “A common problem was that the rear passenger dummy’s head came dangerously close to the front seatback, and in many cases, dummy measurements indicated a risk of neck or chest injuries. All these things tell us that the rear seat belts need improvement.”

None of the five small crew cab pickups IIHS evaluated earns a good rating. The Nissan Frontier is rated acceptable. The Ford Ranger earns a marginal rating, and the Chevrolet Colorado, Jeep Gladiator and Toyota Tacoma are all rated poor. The ratings only apply to the crew cab versions.