1 files changed, 1 insertions, 1 deletions
diff --git a/tox.ini b/tox.ini
index 6159a33f..431a42d3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -43,7 +43,7 @@ commands =
     bash -c "find ceilometer -type f -regex '.*\.pot?' -print0|xargs -0 -n 1 msgfmt --check-format -o /dev/null"
 
 [testenv:releasenotes]
-commands = sphinx-build -a -E -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
+commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
 [testenv:genconfig]
 commands = oslo-config-generator --config-file=etc/ceilometer/ceilometer-config-generator.conf