diff --git a/tox.ini b/tox.ini
index 401c249..4ab3f52 100644
--- a/tox.ini
+++ b/tox.ini
@@ -101,6 +101,7 @@ deps=
 skip_install=True
 commands=
     rst2html.py --strict {toxinidir}/README.rst /dev/null
+    rst2html.py --halt=warning {toxinidir}/CHANGELOG.rst /dev/null
     {[post_cmd]commands}
 whitelist_externals={[post_cmd]whitelist_externals}