Note from 2 July 2020

Google's Structure Data testing tool finds only the BreadcrumbList type in my article pages.

Google's Structure Data testing tool

But using @redirectionio's new Structured data validation tool, I've been able to fix an issue with a second type, WebPage, that Google didn't see. 👍

Redirection.io's Structured data validation tool shows an error

Redirection.io's Structured data validation tool shows it's fixed