The new Superman movie is on its way, but one scene didn’t survive the final cut. It had to do with Krypto, Superman’s dog, and according to two of the film’s stars, test audiences just didn’t like it.

“It was just difficult to figure out where I was going to come from with Superman ,” Gunn said speaking to io9 in Los Angeles last week. “And I think that it really started with my dog in a lot of ways. The idea of putting in Krypto, I think, was the fun part for me, because that was something that we hadn’t really seen in a Superman movie.”