I must say I am a bit confused by the way gitlab shows the diff and why the testbot reports failures. Afaics the failures are in a different test though.
I struggled with figuring this out too, but eventually realized that with b0f0dc8a, the changed background color (0.5,0.5,0.5/0x7f7f7f) was being picked up by a subsequent Clear. 46434c88 restores the background color after the Render test, so everything looks good now.