diff --git a/tox.ini b/tox.ini
index 32e5214a79a..ab2dbb8b14d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -97,6 +97,7 @@ commands =
   python setup.py build_sphinx
   rm -rf api-ref/build
   sphinx-build -W -b html -d api-ref/build/doctrees api-ref/source api-ref/build/html/
+whitelist_externals = rm
 
 [testenv:gendriverlist]
 sitepackages = False