Large scale tests have been considered by many scholars in the field of language testing and teaching to influence teaching and learning considerably. The present study looks at the effect of a large scale test (Konkoor) on the attitudes of teachers in high schools. Konkoor is the university entrance examination in Iran which is taken by at least one million candidates of entering Iranian universities. The data for the study comes from a questionnaire answered by high school teachers in Iran. Analyses of the results indicate that Konkoor influences teachers' attitudes regarding different aspects of the language teaching program in Iran.