Cannot allow all users to edit a page within a space restricted to a group

We have a space that is configured so that everyone can view pages, but only members of a group can edit pages.

We want some of those pages to be editable by everyone within the confluence-users group. This does not appear to be possible.

I have tried editing the page and setting the restrict-edit-to to "confluence-users", but those permissions do not seem to apply - when I log in with an id that is only in the confluence-users group, that id cannot edit that page.