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The area of project scheduling problems has seen a tremendous amount of different problem variations. Traditionally, each problem variant requires custom solution approaches in order to produce high-quality solutions. Developing and tuning these methods is an expensive process that may have to be repeated as soon as the requirements or problem structures change. On the other hand, research into hyper-heuristics has produced general heuristic problem-solving techniques that were developed to achieve good results on multiple diverse problem domains. They work with a set of comparatively simple low-level heuristics and dynamically adapt themselves to each new problem variant. In this paper, we investigate hyper-heuristic approaches for a real-world industrial test laboratory scheduling problem and develop a new problem domain for the HyFlex hyper-heuristic framework. We propose a diverse portfolio …