Antimicrobial resistance is on the rise and overuse of antibiotics is one of the biggest contributors. Diagnostic stewardship (DS), often described as ordering the right test for the right patient at the right time, is an adjunct to antimicrobial stewardship (AS). Koch et al study to evaluate the extent of unnecessary testing found that most patients receive unnecessary tests and frontline physicians were often unaware of this. Residents are at the frontline of patient care. They are involved in making critical decisions concerning diagnostic testing and antibiotic choice for treatment. They are an ideal target audience because they are uniquely positioned to be stewardship ambassadors.