diff --git a/tox.ini b/tox.ini
index e5634542..90cc3535 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,7 +15,7 @@ deps =
   django111: django>=1.11,<1.12
   pytest-cov
   pytest-django
-  pytest>=3.3.0
+  pytest>=3.3.0,<4
   WebTest
   mock
   httmock