diff --git a/tox.ini b/tox.ini
index b72f3ad..34f90ca 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,7 +5,7 @@ envlist = py27,py33,py34,py35,flake8,linters,docs
 [testenv]
 deps =
     mock>=2.0.0
-    pytest
+    pytest!=3.0.5
     coverage
 commands =
     coverage run --parallel-mode -m pytest {posargs}