This article draws from a 23-month ethnographic study of mixed-status families living in an emerging Latino/a community to examine 3 undocumented mothers' participation in the act of giving "testimonio," or testimony. In this context, "testimonio" serves as a grassroots tactic for political advocacy and community formation that compensates for and reacts against the limited opportunities for civic participation afforded noncitizens. The findings indicate that giving "testimonio" in both public and domestic settings constitutes a form of civic participation in which undocumented mothers actually attempt to move out of the shadows and into a more public domain.