Shear bias predictions using only single Sérsic (in red), only bulge+disc (in blue), or the real population (green) tested on the whole population (top), on only disc+bulge galaxies (middle) and on single Sérsic galaxies (bottom). Solid lines show the true bias of the populations, and the dashed black lines show the shear bias of the excluded population (the true bias for single Sérsic galaxies in the middle panels and for bulge+disc in the bottom panel).