Triage accuracy is important to ensure effective treatment and management of patients in the emergency department, however this requires nurses to receive high-quality triage training. This article reports the results of a scoping review that aimed to establish what research on triage training exists and what research is required to improve such training. Sixty-eight studies which used a range of training interventions and outcome measurements were reviewed. The authors conclude that the heterogeneity of these studies makes comparison challenging and that this, combined with low methodological quality, requires caution when applying the results in practice. The authors recommend establishing a gold standard for measuring triage training outcomes.