Tenn. Code Ann. § 32-1-109

No last will or testament executed on or before February 15, 1941, shall be good or sufficient to convey or give an estate in lands, unless written in the testator's lifetime, and signed by the testator, or by some other person in the testator's presence and by the testator's direction, and subscribed in the testator's presence by two (2) witnesses at least, neither of whom is interested in the devise of the lands.