diff --git a/tox.ini b/tox.ini
index b388708..51ba925 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,6 +7,7 @@ commands =
     coverage erase
     coverage run test_contextlib2.py
     coverage report
+    coverage xml
 deps =
     coverage
     py27: unittest2