diff --git a/tox.ini b/tox.ini
index 60a480388..101d2b02c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -21,7 +21,7 @@ deps =
     pytest==2.7.0
     pytest-capturelog==0.7
     pytest-qt==1.3.0
-    pytest-mock==0.4.2
+    pytest-mock==0.4.3
 # We don't use {[testenv:mkvenv]commands} here because that seems to be broken
 # on Ubuntu Trusty.
 commands =