The information systems (IS) discipline has not accorded the same attention to theory testing as it has to theory building. Further, crowdsourcing presents rich opportunities for the theory testing process that have not been fully explored. This paper builds on previous work, employing a design science research (DSR) paradigm in order to develop a decision support system artefact that will help early career researchers identify viable theory testing approaches, and how crowdsourcing can help facilitate the testing process. As part of the DSR build/evaluate cycle, this paper presents a conceptual framework and model of theory testing in IS, and the problem frame in which they are situated is evaluated using Scho_n’s theory of reflective practice and problem/solution framing. Data collected from PhD students revealed an incomplete level of knowledge of theory testing, and a lack of awareness of the possibilities provided by adopting a crowdsourcing strategy.