diff --git a/_modules/keystoneng.py b/_modules/keystoneng.py
index 66e0ac7..76b6870 100644
--- a/_modules/keystoneng.py
+++ b/_modules/keystoneng.py
@@ -1181,9 +1181,9 @@
               'auth_url': auth_url}
     try:
         if _client_version(kstone) > 2:
-            client3.Client(**kwargs)
+            client3.Client(**kwargs).authenticate()
         else:
-            client.Client(**kwargs)
+            client.Client(**kwargs).authenticate()
     except (keystoneclient.exceptions.Unauthorized,
             keystoneclient.exceptions.AuthorizationFailure):
         return False