One of the most challenging aspects for teachers is designing quality tests that accurately and fairly measure student achievement or progress. A lack of formal training for teachers in test design and development often results in teachers being unsure of the quality of their own tests and can even result in poorly designed tests, the negative impact and washback of which is known. Item writing training can support teachers to prepare tests that are valid, reliable and fair. In this workshop, I will focus on what is involved in writing good test items and the challenges, the pitfalls to avoid and the procedures to follow to ensure teacher-made tests are of quality.