Hi thanks, it is a good suggestion to simply try creating the device. Perhaps diffusers can be updated to do the same?

Doing this approach makes the list of backends obsolete, so I removed. I just let it throw an unhandled error as I feel the message is informative enough, but let me know if you want that to be caught.

Updated the error message, let me know if it works for you~

Thanks a lot! Can you just run make style on your branch to fix the quality issue?

Woops, I ran this but forgot to commit the changes.

Could you also add some documentation in testing.md to not make it hidden?

Will do 👍 where do you think the best place is this for this in the file?

I should say, to all the suggested changes here, should these also be mirrored in diffusers? My initial PR was basically a direct copy from there.

You can probably add it to docs/source/en/testing.md.
Not sure about diffusers but documenting a new env variable should always be good 😉

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint.

@ArthurZucker added a small section following the "To GPU or not to GPU" section – in my head this fits well. Let me know how you feel about the language there 🤗 I ran make style also which I believe also formats the docs.