diff --git a/tox.ini b/tox.ini
index 4c790158d..d28eab131 100644
--- a/tox.ini
+++ b/tox.ini
@@ -76,6 +76,7 @@ deps =
     -rtests/requirements-py3.txt
     # Extras
     botocore==1.3.23
+    google-cloud-storage==1.29.0
     Pillow==3.4.2
 
 [testenv:extra-deps]