Six experiments are presented to validate the testing methods given in TR-propagation regulation (TF5) being developed by The Electrical Vehicle Safety - Global Technical Regulation (EVS-GTR). The novel testing methods in TF5 draft are present here and used on six different battery packs exposed to thermal runaway. The characteristics of the thermal runaway propagation of the EV battery packs with different designs are investigated. Some of the experiments use the same sample with different heater powers. The result indicated that heater power does not affect the maximum temperature very much, but rather the propagation time. The feasibility of the test approach is demonstrated by the test results. However, the repeatability of the test approach requires improvement. (c) 2019 The Electrochemical Society.