Bollywood legend Amitabh Bachchan says remakes of his old films show their popularity has endured the test of time. ``A remake is a compliment to the original, and truly a challenge to the ones who are doing the remake,'' Bachchan told the Mumbai Mirror newspaper. ``It's a tribute to the caliber of the earlier films.'' Bachchan said he begins shooting in a week for a remake of the blockbuster movie ``Sholay'' or ``Embers.'' He had a role in the original.