Upgrading lxml for Plone 6.1.4

I meant how to run tests on Plone itself, I think the Makefile command only runs your project's tests? I was referring to this discussion where people were considering moving tests out of the wheels Pytest test structure? - #14 by gforcada. I don't see a resolution there, but at least on a couple packages I've looked at the tests are still included in the wheels.