Stress-testing is essential for ensuring the robustness and transparency of computer vision models, particularly when faced with real-world variables such as image quality degradation and occlusion. As models are developed for production, developers must address critical questions about the system's performance under varying conditions, which stress-testing can help answer by identifying the model's breaking points. This process involves using metamorphic relations and techniques from fuzz testing to explore how visual changes impact image annotations, aiding in both strategizing data collection and communicating the model's limitations to users. Lakera's MLTest offers advanced stress-testing capabilities that help developers pinpoint these vulnerabilities, allowing for improved model robustness and clearer user communication.