1 files changed, 1 insertions, 0 deletions
diff --git a/tox.ini b/tox.ini
index 0d19225f8..99e243ad6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -20,6 +20,7 @@ deps =
     du13: docutils==0.13.1
     du14: docutils==0.14
 setenv =
+    PYTHONWARNINGS = all,ignore::ImportWarning:pkgutil
     SPHINX_TEST_TEMPDIR = {envdir}/testbuild
 commands=
     pytest -Wall --durations 25 {posargs}