That is not "testimony", insofar as Libby is not under oath, and has no obligation to assist the FBI.
Okay, but it's a argument of sophistry on your part to object to the term "testimony." Counts 2 and 3 of the indictment recite those dates and that testimony as the object of "false statement" offenses, which are a crime under 18 USC 1001(a)(2).