The hydrocele test is not a specific test for the army. It is a medical examination that can be conducted in various settings, including the military. A hydrocele is a collection of fluid inside the area of the scrotum, surrounding the testicle. The hydrocele test is used to diagnose a hydrocele, which can be easily seen by shining a flashlight through the swollen part of the scrotum. The hydrocele test is not a painful procedure and involves shining a light through the scrotum to check for the presence of fluid. In the military, a hydrocele may be a disqualifying condition if it is associated with pain or precludes a complete exam of the scrotal contents.