Ethics education aims to train physicians to identify and resolve ethical issues. To address ethical concerns, physicians may need to confront each other. We surveyed medical students to determine if their comfort challenging members of their ward teams about ethical issues varies by specialty and what attributes of students and their teams contributed to that comfort. Compared to other specialties, students felt significantly less comfortable challenging team members about ethical issues on surgery and obstetrics/gynecology. We suggest that ethics education must address the atmosphere on ward teams and give students skills to help them speak out despite their discomfort.