This study presents a shake table test campaign aimed at evaluating the effectiveness of UNI-CAM, a novel seismic strengthening technology for fair-faced masonry. UNI-CAM is derived from the CAM® system and utilizes stainless steel bands. To preserve the fair-faced appearance of the façades, these bands are applied only on the internal side and across the wall thickness, while on the external side, transverse connectors are anchored with small endplates. Shake table tests were conducted using tri-axial natural earthquake records on a large-scale rubblestone masonry structure, designed to replicate the materials and construction techniques of historic buildings. After an initial testing phase, the prototype was repaired and retrofitted with UNI-CAM. A comparative analysis of the structural response in both the unreinforced and retrofitted configurations assesses the effectiveness of UNI-CAM in delaying damage progression and enhancing both acceleration and displacement capacity.