B1 Preliminary, previously known as Cambridge English: Preliminary and the Preliminary English Test (PET), is an English language examination provided by Cambridge Assessment English (previously known as Cambridge English Language Assessment and University of Cambridge ESOL examinations).

B1 Preliminary is an intermediate-level qualification and is designed for learners who have mastered the basic of English and now have practical language skills for everyday use. It is targeted at Level B1 of the Common European Framework of Reference (CEFR).

B1 Preliminary is one of the examinations in Cambridge English Qualifications – a path for improving language skills. Each Cambridge English Qualification targets a particular level of the CEFR and they work together to create an effective learning journey.

There are Cambridge English Qualifications for schools, general and higher education, and business. B1 Preliminary is offered in two versions, B1 Preliminary for Schools, for school-aged learners, and B1 Preliminary, for general and higher education adult learners.