Recent critical discussion of the Oral Proficiency Interview has questioned the adequacy and validity of the interview guidelines. The present study considers the role of accommodation in interview discourse and suggests that the extent of interviewer accommodation reveals an overlooked criterion for gauging the authenticity of the interview as simulated conversational interaction. The issue of misplaced accommodation as a threat to both the validity of the interview and the subsequent rating process is also raised, and supplementary criteria for training interviewers and evaluating the interview process are considered.