diff --git a/keystoneclient/exceptions.py b/keystoneclient/exceptions.py
index 2e3270a88..5b06be9bb 100644
--- a/keystoneclient/exceptions.py
+++ b/keystoneclient/exceptions.py
@@ -415,7 +415,7 @@ An alias of :py:exc:`keystoneauth1.exceptions.auth_plugins.NoMatchingPlugin`
 class UnsupportedParameters(ClientException):
     """A parameter that was provided or returned is not supported.
 
-    :param list(str) names: Names of the unsupported parameters.
+    :param List(str) names: Names of the unsupported parameters.
 
     .. py:attribute:: names
 
diff --git a/setup.cfg b/setup.cfg
index 9e913a716..e1e9851a7 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -40,9 +40,9 @@ keystoneclient.auth.plugin =
 source-dir = doc/source
 build-dir = doc/build
 all_files = 1
+warning-is-error = 1
 
 [pbr]
-warnerrors = True
 autodoc_tree_index_modules = True
 autodoc_tree_excludes =
   setup.py