The oral interaction examination used by Britain's Royal Society of Arts for testing communicative use of English as a foreign language is described. The underlying principles of the test, its structure, administration, issues of reliability and validity, and scoring are outlined. Three components of the test itself are included. One component is a five-minute interview task and the materials on which the interview is based. The second and third components are a choice of tasks to be performed with another student and an explanation of the task to be given to a teacher. (MSE)