Administration user images must have an alternate text

WCAG warnings in the test class [org.xwiki.administration.test.ui.AllITs]:
__________

Validation in the test method [registerJohnSmith]
Check for [org.xwiki.administration.test.po.AdministrationSectionPage] at http://xwikiweb:8080/xwiki/bin/admin/XWiki/XWikiPreferences?form_token=VJJEvajnPexyqoSxcoXyQQ&section=Users.

2: Images must have alternate text
Description: Ensures <img> elements have alternate text or a role of none or presentation
Help URL: https://dequeuniversity.com/rules/axe/4.6/image-alt?application=axeAPI
Help: Images must have alternate text
Impact: critical
Tags: cat.text-alternatives, wcag2a, wcag111, section508, section508.22.a, ACT

HTML element:
<img class="user-avatar" src="/xwiki/bin/skin/resources/icons/xwiki/noavatar.png?cache-version=1680811190000">
Selector: [.user-avatar]
Fix any of the following:
Element does not have an alt attribute
aria-label attribute does not exist or is empty
aria-labelledby attribute does not exist, references elements that do not exist or references elements that are empty
Element has no title attribute
Element's default semantics were not overridden with role="none" or role="presentation"