test_markdown fails rendering with pygments > 2.10

Upstream is aware of the problem (tho, the proposed fix does not resolve the issue quite yet):
https://github.com/encode/django-rest-framework/issues/8160

=================================== FAILURES ===================================
__________________ TestViewNamesAndDescriptions.test_markdown __________________

self = <tests.test_description.TestViewNamesAndDescriptions testMethod=test_markdown>

    @pytest.mark.skipif(not apply_markdown, reason="Markdown is not installed")
    def test_markdown(self):
        """
        Ensure markdown to HTML works as expected.
        """
        # Markdown 3.3 is only supported on Python 3.6 and higher
        if sys.version_info >= (3, 6):
> assert apply_markdown(DESCRIPTION) == MARKDOWN_BASE % MARKDOWN_gte_33
E AssertionError: assert '<h2 id="an-e...<p><br /></p>' == '<h2 id="an-e...<p><br /></p>'
E Skipping 445 identical leading characters in diff, use -v to show
E - an class="nt">&quot;beta: &quot;</span><span class="err">this</span> <span class="err">is</span> <span class="err">a</span> <span class="err">string&quot;</span><br /><span class="p">}]</span><br /></pre></div>
E + an class="s2">&quot;beta: &quot;</span><span class="kc">t</span><span class="err">his</span> <span class="err">is</span> <span class="err">a</span> <span class="err">s</span><span class="kc">tr</span><span class="err">i</span><span class="kc">n</span><span class="err">g&quot;</span><br /><span cl...
E
E ...Full output truncated (2 lines hidden), use '-vv' to show

tests/test_description.py:170: AssertionError
=============================== warnings summary ===============================
tests/test_authtoken.py::AuthTokenTests::test_authtoken_can_be_imported_when_not_included_in_installed_apps
  /usr/lib/python3/dist-packages/django/db/models/base.py:316: RuntimeWarning: Model 'authtoken.token' was already registered. Reloading models is not advised as it can lead to inconsistencies, most notably with related models.
    new_class._meta.apps.register_model(new_class._meta.app_label, new_class)

tests/test_authtoken.py::AuthTokenTests::test_authtoken_can_be_imported_when_not_included_in_installed_apps
  /usr/lib/python3/dist-packages/django/db/models/base.py:316: RuntimeWarning: Model 'authtoken.tokenproxy' was already registered. Reloading models is not advised as it can lead to inconsistencies, most notably with related models.
    new_class._meta.apps.register_model(new_class._meta.app_label, new_class)

-- Docs: https://docs.pytest.org/en/stable/warnings.html
=========================== short test summary info ============================
FAILED tests/test_description.py::TestViewNamesAndDescriptions::test_markdown
=========== 1 failed, 1275 passed, 127 skipped, 2 warnings in 15.83s ===========