diff --git a/tox.ini b/tox.ini
index 7128767e..e7762264 100644
--- a/tox.ini
+++ b/tox.ini
@@ -11,7 +11,7 @@ commands =
         {posargs}
 deps =
     mock
-    pytest
+    pytest<3.3.0
     pytest-capturelog
     pytest-cov
     pytest-xdist