N.C. Gen. Stat. § 31-9: Executor competent witness.

No person, on account of being an executor of a will, shall be incompetent to be admitted a witness to prove the execution of such will, or to prove the validity or invalidity thereof. (R.C., c. 119, s. 9; Code, s. 2146; Rev., s. 3119; C.S., s. 4137.)