diff --git a/tox.ini b/tox.ini
index f0e86061..ef0cf9c8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -11,8 +11,8 @@ setenv =
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands =
+    coverage erase
     python setup.py testr --coverage --testr-args='{posargs}'
-    coverage combine
     coverage report -m
 
 [testenv:debug]