The range and frequency of clinical tests used by Australian osteopaths to detect sacroiliac joint dysfunction (SIJD) is unknown. The aim of this study was to determine what clinical tests are employed by Australian osteopaths to assess for SIJD, and determine whether a correlation existed between these tests and clinical experience. Surveys were mailed to all Australian osteopathic practice locations listed in the current phone directory. 168 osteopaths responded to the survey, with an estimated response rate of 30%. Most respondents reported they utilise asymmetry of bony landmarks, motion tests and pain provocation tests to detect SIJD. The PSIS (94%) was most frequently examined for asymmetry, sacral springing (prone) (73%) was the most frequently reported motion test, and the piriformis (80%) was most frequently examined for tenderness and/or tissue texture change. Only 14% of respondents completely abstained from using pain provocation testing. It appeared that many osteopaths used diagnostic procedures consistent with the model proposed by Mitchell, but supported them with other motion and pain provocation tests. The use of standard tests commonly advocated in the osteopathic literature declined with increasing practitioner experience, whereas the use of a wide range of idiosyncratic 1 tests increased. It appeared that the majority of osteopaths use pain provocation tests, which are not advocated by any osteopathic text, but commonly referred to in the wider manual therapy literature.