diff --git a/tox.ini b/tox.ini
index 7706b18..d682619 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,7 +6,6 @@ skip_missing_interpreters = True
 commands =
     coverage run test_contextlib2.py
     coverage report
-    coverage combine
     coverage xml
 deps =
     coverage