diff --git a/watcher/common/exception.py b/watcher/common/exception.py
index d6adc085f..ca798fab8 100644
--- a/watcher/common/exception.py
+++ b/watcher/common/exception.py
@@ -207,7 +207,7 @@ class AuditTemplateAlreadyExists(Conflict):
 
 class AuditTemplateReferenced(Invalid):
     msg_fmt = _("AuditTemplate %(audit_template)s is referenced by one or "
-                "multiple audit")
+                "multiple audits")
 
 
 class AuditTypeNotFound(Invalid):
@@ -317,7 +317,7 @@ class AuthorizationFailure(WatcherException):
 
 
 class KeystoneFailure(WatcherException):
-    msg_fmt = _("'Keystone API endpoint is missing''")
+    msg_fmt = _("Keystone API endpoint is missing")
 
 
 class ClusterEmpty(WatcherException):
diff --git a/watcher/common/utils.py b/watcher/common/utils.py
index 741947ace..44fef6bbf 100644
--- a/watcher/common/utils.py
+++ b/watcher/common/utils.py
@@ -165,7 +165,7 @@ def extend_with_strict_schema(validator_class):
                 raise exception.AuditParameterNotAllowed(parameter=para)
 
             for error in validate_properties(
-                    validator, properties, instance, schema
+                validator, properties, instance, schema
             ):
                 yield error