diff --git a/ceilometer/api/controllers/v2/query.py b/ceilometer/api/controllers/v2/query.py
index c9348072..3826294f 100644
--- a/ceilometer/api/controllers/v2/query.py
+++ b/ceilometer/api/controllers/v2/query.py
@@ -216,7 +216,7 @@ class ValidatedComplexQuery(object):
                 self._validate_orderby(self.orderby)
             except (ValueError, jsonschema.exceptions.ValidationError) as e:
                 raise base.ClientSideError(
-                    _("Order-by expression not valid: %s") % e.message)
+                    _("Order-by expression not valid: %s") % e)
             self._convert_orderby_to_lower_case(self.orderby)
             self._normalize_field_names_in_orderby(self.orderby)
 
diff --git a/ceilometer/tests/api/v2/test_complex_query_scenarios.py b/ceilometer/tests/api/v2/test_complex_query_scenarios.py
index 809167f1..f2a048a6 100644
--- a/ceilometer/tests/api/v2/test_complex_query_scenarios.py
+++ b/ceilometer/tests/api/v2/test_complex_query_scenarios.py
@@ -293,7 +293,7 @@ class TestQueryMetersController(tests_api.FunctionalTest,
 
         self.assertEqual(2, len(data.json))
         for sample_item in data.json:
-            self.assertTrue(sample_item["metadata"]["util"] >= 0.5)
+            self.assertTrue(float(sample_item["metadata"]["util"]) >= 0.5)
 
     def test_filter_with_negation(self):
         filter_expr = '{"not": {">=": {"metadata.util": 0.5}}}'
diff --git a/tox.ini b/tox.ini
index 8097260e..4b5c4767 100644
--- a/tox.ini
+++ b/tox.ini
@@ -50,6 +50,7 @@ commands = python -m testtools.run \
          ceilometer.tests.api.v2.test_alarm_scenarios.TestAlarms.test_alarms_query_with_timestamp \
          ceilometer.tests.api.v2.test_alarm_scenarios.TestAlarms.test_get_alarm_history_constrained_by_alarm_id_failed \
          ceilometer.tests.api.v2.test_app \
+         ceilometer.tests.api.v2.test_complex_query_scenarios.TestQueryMetersController.test_query_with_volume_field_name_orderby \
          ceilometer.tests.api.v2.test_complex_query_scenarios.TestQueryMetersController.test_query_with_isotime \
          ceilometer.tests.api.v2.test_event_scenarios.TestEventAPI.test_get_events_filter_datetime_trait \
          ceilometer.tests.api.v2.test_list_meters_scenarios.TestListMeters.test_query_samples_with_invalid_field_name_and_eq_operator \