Don't test python3.5 now that we test python3.7
diff --git a/tox.ini b/tox.ini
index d173921..a4be8bf 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 # These should match the travis env list
-envlist = py27,py35,py36,py37,pypy
+envlist = py27,py36,py37,pypy
 
 [testenv]
 deps = -rrequirements-dev.txt