diff --git a/tox.ini b/tox.ini
index 24c376e..a7a9956 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,7 +7,6 @@
 envlist = py27, py34, py35, py36, py37
 
 [testenv]
-usedevelop = True
 deps =
     .[test]
 commands =