What are the accepted types of language tests? For the purpose of meeting the English language requirement of the PKU–UChicago International Policy Action Lab program, students may submit either: Test of English as a Foreign Language (TOEFL) or International English Language Testing System (IELTS) or Academic English Proficiency Assessment (AEPA) TOEFL and IELTS scores are valid for two years. Your test score must be valid at the time of the admissions deadline.