A Buzzfeed technology reporter is likely to face a deposition in a British caving expert’s defamation lawsuit against Elon Musk—a lawsuit that has seen Buzzfeed’s own reporting on Musk’s remarks take center stage in the wake of the rescue of a Thai youth soccer team from a flooded cave last year.

U.S. Magistrate Judge Jacqueline Scott Corley said Thursday that Buzzfeed journalist Ryan Mac would at least have to answer questions from lawyers for British caver Vernon Unsworth about whether he had any reporter-source relationship with Musk prior to the tech CEO sending him an email labeled “off the record.”