This short contribution reports the development of a test for assessing middle school students’ physics proficiency via multiple-choice single-select items in German language. The test assesses students’ content and procedural knowledge across various content areas that are typical of physics education at the middle-school level and is based on adapted items developed within the Third International Mathematics and Science Study (TIMSS). We report the study design we used to develop this test, as well as the results and selected parameters regarding the test’s psychometric quality.