diff --git a/tox.ini b/tox.ini
index d96e7d202..8bf07b12e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -32,7 +32,7 @@ deps =
     pytest-cov==2.2.0
     pytest-faulthandler==1.1.0
     pytest-html==1.7
-    pytest-mock==0.8.1
+    pytest-mock==0.9.0
     pytest-qt==1.9.0
     pytest-sugar==0.5.1
     pytest-travis-fold==1.2.0