Wow, that's annoying the way it pages automatically like that. This can even cause failures in the test above (test_partner_images_pager_one). I'm concerned that neither this test nor the one above will pass consistently on CI because of this.

I wonder if we need to take a different approach to this. Maybe something like having just one list of images and then doing a wait for the image to become visible on each one. We should be able to do the other checks (for expected img src, and validity of img src) whether or not the images are currently on screen.