diff --git a/tempest/exceptions.py b/tempest/exceptions.py
index 448fbdf..62bd8cf 100644
--- a/tempest/exceptions.py
+++ b/tempest/exceptions.py
@@ -105,7 +105,7 @@
 
 class AuthenticationFailure(RestClientException):
     message = ("Authentication with user %(user)s and password "
-               "%(password)s failed")
+               "%(password)s failed auth using tenant %(tenant)s.")
 
 
 class EndpointNotFound(TempestException):