Test images
img local PNG (relative)
img local PNG (relative to root)
img PNG (remote)
img SVG (relative)
CSS background-image (relative)
CSS background-image (relative to root)
CSS background-image (remote)
img data-uri (ignored)
CSS background-image data-uri (ignored)
CSS background stacked (local and remote)
img srcset
Duplicates of some of the above images, to verify they are not duplicated in resources: