This chapter outlines the various available tests available to the onco-neuro-gastroenterologist to evaluate the stomach, depending upon the presence and magnitude of symptoms suggestive of gastric sensory-motor gastrointestinal disorder, such as dyspepsia, early satiety, nausea, or vomiting. Some of these tests are not readily available in the community setting and referrals may be needed. Others are promising novel technologies, at various stages of market availability and validation.