[selectors-4] Should `document.documentElement` match `:scope` when `document` is included `scoping roots`?

[cdoublev]

Otherwise I cannot understand how, following the corresponding definitions of HTML and Selectors, document.querySelector(':scope') can return document.documentElement (:root), which is apparently expected (wpt.fyi, WPT).

In some contexts, selectors are matched with respect to one or more scoping roots, such as when calling the querySelector() method in [DOM]. The :scope pseudo-class represents this scoping root [...]

https://drafts.csswg.org/selectors-4/#the-scope-pseudo

My understanding is that document is passed as one of the scoping roots, and that none of the candidate elements match :scope since none is included in scoping roots.