Systems and methods for testing defibrillator electrode conductivity. Connection for electrically connecting electrodes and defibrillation signal generator connected to the electrodes. Patient impedance measurement system comprising patient signal generator and patient signal receiver. A defibrillator controller connected to defibrillation signal generator and patient impedance measurement system. An electrode test system with control signal device connected to the patient signal receiver which generates at least one control signal causing the patient signal receiver to change from a patient signal receive state to an electrode test signal receive state, a test commence signal device connected to the patient signal generator which generates at least one test commence signal causing the patient signal generator to send a test signal to the electrodes and an electrode test signal device connected to the patient signal receiver which receives an electrode test signal and processes the signal to determine a test result.