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-rw-r--r--tox.ini2
1 files changed, 1 insertions, 1 deletions
diff --git a/tox.ini b/tox.ini
index acec80aaec..2be0b20128 100644
--- a/tox.ini
+++ b/tox.ini
@@ -94,7 +94,7 @@ sitepackages = True
downloadcache = ~/cache/pip
[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:pep8]
basepython = python2.7