diff --git a/tools/make_test_data.py b/tools/make_test_data.py
index fd2a5995..fd888e1e 100755
--- a/tools/make_test_data.py
+++ b/tools/make_test_data.py
@@ -44,8 +44,9 @@ def make_test_data(name, meter_type, unit, volume, random_min,
                    end, interval, resource_metadata=None, source='artificial'):
     resource_metadata = resource_metadata or {'display_name': 'toto',
                                               'host': 'tata',
-                                              'image_ref_url': 'test',
+                                              'image_ref': 'test',
                                               'instance_flavor_id': 'toto',
+                                              'server_group': 'toto',
                                               }
     # Compute start and end timestamps for the new data.
     if isinstance(start, datetime.datetime):