Tex. Code Crim. Proc. art. 38.08
Current with legislation from the 2023 Regular and Special Sessions signed by the Governor as of November 21, 2023.
Any defendant in a criminal action shall be permitted to testify in his own behalf therein, but the failure of any defendant to so testify shall not be taken as a circumstance against him, nor shall the same be alluded to or commented on by counsel in the cause.
Tex. Code Crim. Proc. § 38.08