Use wireframes to test scenarios
Your wireframes must support every step in your test scenarios. Missing screens or unclear transitions immediately reveal gaps in your design thinking. The fidelity level depends on what you're testing, but even rough sketches should cover complete user journeys.
Include enough detail for meaningful evaluation without getting lost in visual polish. Wireframe text, button labels, navigation elements, and form fields all matter for usability. Lorem ipsum won't cut it when evaluators need to assess whether instructions make sense or error messages help users recover.
Interactive prototypes provide richer evaluation opportunities than static images. Click-through functionality lets evaluators experience flow and transitions. However, even paper sketches work if they include all screens and clearly show connections between steps. Completeness matters more than polish.

