Section 971 Of Article 4. Privilege Not To Testify Against Spouse From California Evidence Code >> Division 8. >> Chapter 4. >> Article 4.

. Except as otherwise provided by statute, a married person whose spouse is a party to a proceeding has a privilege not to be called as a witness by an adverse party to that proceeding without the prior express consent of the spouse having the privilege under this section unless the party calling the spouse does so in good faith without knowledge of the marital relationship.