diff --git a/tox.ini b/tox.ini
index 45261f83..7a32ef86 100644
--- a/tox.ini
+++ b/tox.ini
@@ -71,7 +71,7 @@ commands =
   stestr run --no-subunit-trace {posargs}
   coverage combine
   coverage html -d cover
-  coverage xml -o cover/coverage.x
+  coverage xml -o cover/coverage.xml
   coverage report --fail-under=92 --skip-covered
 
 [testenv:docs]