Embodiments of the present disclosure provide an apparatus for testing a plurality of prosthetic heart valve leaflets. The apparatus includes a vertical mount, and a plurality of horizontal bars are movably coupled to the mount. Each bar extends away from the mount along a respective bar-axis that lies on a respective vertical bar-plane. Each bar is configured to support a respective leaflet along the respective bar-axis such that the respective leaflet drapes over the respective bar. The apparatus further includes an image sensor, positioned opposite the mount, facing the plurality of bars and the mount so as to be oriented to acquire an image that includes the plurality of leaflets draped over the plurality of bars. Other embodiments are also described.