Tabs/pills seem to lack a means to set roles and aria attributes. Excerpt from bootstrap docs (https://getbootstrap.com/docs/4.0/components/navs/#javascript-behavior):   ``` Dynamic tabbed interfaces, as described in the WAI ARIA Authoring Practices, require role="tablist", role="tab", role="tabpanel", and additional aria- attributes in order to convey their structure, functionality and current state to users of assistive technologies (such as screen readers). ```  

---