By Maureen Lee Lenker
June 07, 2018 at 06:47 PM EDT

Pete Davidson may have the sign of the Deathly Hallows tattooed on his arm, but it appears he can’t measure up to new girlfriend Ariana Grande’s knowledge of Harry Potter and the wizarding world.

On Thursday afternoon, Grande shared a video of Davidson mocking her Hermione-esque familiarity with the story. “I don’t know these weird facts that you know because they don’t advance the story at all,” Davidson says in the video. “Like me knowing what Professor Quirrell’s favorite scarf is, it’s just not what Harry Potter was to me.”

He continues, “I’ve seen each movie like 20 times, but I’m sorry I don’t know what Dumbledore’s cat when he was 4 is named. ’Cause it just didn’t advance the f—ing story.”

It seems that Harry Potter is a key part of Grande and Davidson’s relationship. When the pair went public with their relationship last month, it was via an Instagram post that showed the two of them wearing Hogwarts house robes — Davidson in Gryffindor, Grande in Slytherin — with the caption “The chamber of secrets has been opened.”

Check out Grande and Davidson’s social media antics above.