diff --git a/tox.ini b/tox.ini
index 7195b10..02c1a6a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,4 +3,5 @@ envlist = py27,py34
 
 [testenv]
 deps = pytest
+       pymongo==3.0.1
 commands = py.test tests/