Cyber-Physical Systems (CPSs) help solve real-world challenges by gathering data and reacting physically to it in real-time. Through advanced driving assistance systems (ADAS), medical devices, or uncrewed aerial vehicles for agricultural purposes, CPSs are already well-present across various application domains. However, the testing techniques and strategies are often specific to those domains due to the versatile deployments of those systems. Furthermore, the constituent elements of CPSs are similar, so testing techniques from a specific domain could be adapted to fit the requirements of another one. In this paper, we perform a preliminary survey to probe the testing tendencies across CPS application domains.