The phrase "bare testimony" refers to a statement or claim made without any supporting evidence or proof. Antonyms for this phrase would include "substantiated testimony," "validated testimony," or "corroborated testimony," all of which suggest that there is concrete evidence to back up the claims being made. Other antonyms might include "detailed testimony," "elaborate testimony," or "comprehensive testimony," which suggest that a complete and thorough record of events has been offered. Alternatively, "partial testimony," "incomplete testimony," or "sketchy testimony" might be used to suggest that the information being presented is inadequate or insufficient. Ultimately, the choice of antonym will depend on the nature of the testimony being discussed and the context in which it is presented.