New paths for product lifecycle management methods and IT tools appeared throughout traditional products evolving to smart products due to recent information and communication technology innovations. While some led to new, disruptive solutions, for example, reconfigurable smart products during their use phase based on digital twins, some others support or even enhance existing product lifecycle activities. Focusing on the latter, this contribution introduces how digital twins can be used in early product development phases to support the testing and subsequential evaluation of prototypes. Therefore, a test management approach is described that allows the integration of digital twins of devices under test, following a systematical exploration of their potential benefit on real-time analysis during and after the test run. Finally, the results were prototypically implemented by modeling a test environment in a product lifecycle management tool, including managing and analyzing digital twins of product instances.