diff --git a/python/tox.ini b/python/tox.ini
index 2f505eeda..d02e7e76e 100644
--- a/python/tox.ini
+++ b/python/tox.ini
@@ -10,6 +10,7 @@ deps =
     -rrequirements.txt
     pytest>=3.6
     pytest-random-order
+    importlib-metadata!=0.21
 commands =
     # Generate local files
     python setup.py build