Abstract-This paper reports on an auto-ethnographic study of the use of smartphones to facilitate online testing in the context of second-language teacher education (SLTE). A total of 54 pre-service teachers participated in the study. Preliminary data were collected through observation and written reflection, and additional data were gathered from interviews and students' web activity logs to enable triangulation. Thematic analysis was carried out on the qualitative data. The findings show that smartphones are a viable electronic tool to facilitate online testing in an SLTE context. More importantly, using Moodle as an online test platform meets both teachers' and students' needs with respect to aspects such as design, test structure and online testing activity. The study also highlights some benefits and challenges of employing sequential and multiple-attempt test modes and providing delayed feedback on online tests. The implications of these findings are discussed, with suggestions for further research in the field.