Wyo. Stat. § 7-11-401: Testimony of defendant.

The defendant in all criminal cases, in all the courts in this state, may be sworn and examined as a witness, if he so elects, but the defendant shall not be required to testify in any case unless he has been lawfully granted immunity from prosecution, penalty or forfeiture. The neglect or refusal of a defendant to testify without immunity having been granted shall not create any presumption against him, nor shall any reference be made to, nor shall any comment be made upon, his neglect or refusal to testify.