diff --git a/magnumclient/common/httpclient.py b/magnumclient/common/httpclient.py
index bc206f8d..1b72ad7b 100644
--- a/magnumclient/common/httpclient.py
+++ b/magnumclient/common/httpclient.py
@@ -172,7 +172,8 @@ class HTTPClient(object):
             self.log_http_response(resp)
 
         if 400 <= resp.status < 600:
-            LOG.warn("Request returned failure status.")
+            if LOG.handlers:
+                LOG.warn("Request returned failure status.")
             error_json = self._extract_error_json(body_str)
             raise exceptions.from_response(
                 resp, error_json.get('faultstring'),