1 files changed, 1 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index 63f1e4bd..cf899b74 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,7 +7,7 @@ deps =
     coverage
     iso8601
     pretend
-    pytest
+    pytest!=2.8.4
     hypothesis>=1.11.4
     pyasn1_modules
     ./vectors