Despite the increasing use of structural adhesives for the repair or reinforcement of metallic structures (e.g., using adhesively bonded FRP systems), the durability of bonded joints under continuous loading remains a significant challenge. In fact, it affects their long-term performance and reduces their mechanical properties. Mechanical characterization tests are essential for evaluating the behavior of bonded joints before and after creep aging. However, the sample geometry required for mechanical characterization differs, in some cases, from that used in the creep testing setup. This study aims to propose and validate a new sample configuration reffered to as configuration 2, as an alternative to the conventional symmetrical sample geometry (noted as configuration 1), that integrates both the creep test frame and the mechanical characterization test setup. The study focuses specifically on fracture mechanics test in shear mode (mode II), which has been identified as the dominant failure mode in the literature. The End-Loaded Split (ELS) test, which is commonly used for mode II testing of bonded assemblies, was adapted in this work. The creep frame used in this study consists of a four-point bending setup allowing a constant stress state in the adhesive bondline. The mode II mechanical properties for both configurations were compared. First, mode II toughness was calculated at the initial state according to the ELS test standard. Subsequently, Digital Image Correlation (DIC) was used to assess the J-integral in mode II, and optical fiber sensors were employed to monitor crack growth during propagation.