diff --git a/gcloud/test_connection.py b/gcloud/test_connection.py
index 1e0ebb8f690f..1a9b274e91a5 100644
--- a/gcloud/test_connection.py
+++ b/gcloud/test_connection.py
@@ -43,3 +43,9 @@ def authorize(self, http):
         conn = self._makeOne(creds)
         self.assertTrue(conn.http is authorized)
         self.assertTrue(isinstance(creds._called_with, Http))
+
+    def test_user_agent_format(self):
+        from pkg_resources import get_distribution
+        expected_ua = 'gcloud-python/{0}'.format(get_distribution('gcloud').version)
+        conn = self._makeOne() 
+        self.assertEqual(conn.USER_AGENT, expected_ua)