diff --git a/tox.ini b/tox.ini
index 196d9bfaf0..ba4c882f23 100644
--- a/tox.ini
+++ b/tox.ini
@@ -152,6 +152,8 @@ description = run mockupdb tests
 deps =
     {[testenv:test]deps}
     https://github.com/ajdavis/mongo-mockup-db/archive/master.zip
+extras =
+    {[testenv:test]extras}
 passenv = *
 commands =
     {[testenv:test]commands} {posargs} ./test/mockupdb