diff --git a/tox.ini b/tox.ini
index b0a17aa8d..f2c62fcce 100644
--- a/tox.ini
+++ b/tox.ini
@@ -22,7 +22,6 @@ deps =
 commands =
     coverage erase
     python setup.py testr --coverage --testr-args='{posargs}'
-    coverage combine --append
     coverage xml
     diff-cover --fail-under 100 coverage.xml