path: root/Misc/NEWS.d/next/Library/2018-08-21-16-20-33.bpo-29620.xxx666.rst

:func:`~unittest.TestCase.assertWarns` no longer raises a ``RuntimeException``
when accessing a module's ``__warningregistry__`` causes importation of a new
module, or when a new module is imported in another thread. Patch by Kernc.