1 files changed, 2 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index bb33d65..8c35391 100644
--- a/tox.ini
+++ b/tox.ini
@@ -19,7 +19,8 @@ deps =
     PyContracts==1.8.3
     unittest-mixins==1.4
     #-e/Users/ned/unittest_mixins
-    py{27,34,35,36}: gevent==1.3.2
+    # gevent 1.3 causes a failure: https://bitbucket.org/ned/coveragepy/issues/663/gevent-132-on-windows-fails
+    py{27,34,35,36}: gevent==1.2.2
     py{27,34,35,36,37}: eventlet==0.23.0
     py{27,34,35,36,37}: greenlet==0.4.13