diff --git a/tox.ini b/tox.ini
index 732dc7b89..33d232003 100644
--- a/tox.ini
+++ b/tox.ini
@@ -44,7 +44,9 @@ deps = unit: {[_unit]deps}
 addopts = -v --pyargs --doctest-modules --doctest-ignore-import-errors
 norecursedirs = doc .git dist build _build .ipynb_checkpoints
 filterwarnings =
-       error
+       error,
+       ignore:datetime\.datetime\.utcfromtimestamp\(\):DeprecationWarning:dateutil\.tz\.tz # https://github.com/dateutil/dateutil/pull/1285
+
 
 [flake8]
 include = *.py