How can I switch back to the green circle skin for questions answered correctly?

When I went to complete my homework today, I found that–to my horror–the green circles that used to indicate a question answered correctly had been replaced with these ugly, thin, green checkmarks. Is there any way to disable this? I get that it's good for accessibility, but please add some way to opt out if there isn't one already. I want my green circles back!

The new question design.

In context

The better design (forgive the poor quality, this is a secondhand screenshot of a video before the change was implemented).