Revamped testbed

CAPTCHA purpose text alternative (captcha)

CAPTCHAs include a descriptive alt attribute or accompanying explanation for its purpose.

Missing alternative CAPTCHA:

This page does not include both the visual and the audio CAPTCHA:

CAPTCHA code to type in

Enter the code you see or hear:

Note: Easy to implement, because you just need to check if the CAPTCHA has audio / image alternative.