Dynamic environmental testing of structures faces increasing challenges as components must be qualified against more demanding and complex multiaxial vibration environments. Current approaches based on sequential uniaxial testing may fail to capture actual damage mechanisms, potentially leading to inaccurate lifetime predictions. While multiaxial approaches have been discussed in literature to overcome this issue, their industrial implementation remains limited. This research focuses on the design and execution of more representative multiaxial dynamic environmental tests to improve the durability assessment of structural components. A recently introduced framework for multiaxial fatigue analysis is explored in the context of electric vehicle durability testing. The study examines in detail how the cross-correlation of the vibration environment influences component responses and demonstrates that classical uniaxial tests can lead to unrealistic fatigue damage.