Merge branch '2.0'

1 files changed, 4 insertions, 3 deletions

diff --git a/tox.ini b/tox.ini
index 0ae042b3f..1ac0bff79 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,21 +1,22 @@
 [tox]
 minversion = 2.4.0
-envlist = docs,flake8,mypy,coverage,py{35,36,37,38},du{12,13,14,15}
+envlist = docs,flake8,mypy,coverage,py{35,36,37,38,39},du{12,13,14,15}
 
 [testenv]
 usedevelop = True
 passenv =
     https_proxy http_proxy no_proxy PERL PERL5LIB PYTEST_ADDOPTS EPUBCHECK_PATH
 description =
-    py{35,36,37,38}: Run unit tests against {envname}.
+    py{35,36,37,38,39}: Run unit tests against {envname}.
     du{12,13,14}: Run unit tests with the given version of docutils.
 deps =
     coverage < 5.0  # refs: https://github.com/sphinx-doc/sphinx/pull/6924
+    git+https://github.com/html5lib/html5lib-python ; python_version >= "3.9"  # refs: https://github.com/html5lib/html5lib-python/issues/419
     du12: docutils==0.12
     du13: docutils==0.13.1
     du14: docutils==0.14
     du15: docutils==0.15
-    du16: docutils==0.16rc1
+    du16: docutils==0.16
 extras =
     test
 setenv =