diff --git a/tests/test_db_factory.py b/tests/test_db_factory.py
index 4c216ad2..fe5b329e 100644
--- a/tests/test_db_factory.py
+++ b/tests/test_db_factory.py
@@ -248,36 +248,36 @@ TestDBFactory
                                                for x in building.onsite_electrical_production[cte.MONTH]]
       yearly_on_site_electrical_production = [x * cte.WATTS_HOUR_TO_JULES
                                               for x in building.onsite_electrical_production[cte.YEAR]]
-      results = json.dumps({cte.INSEL_MEB: [
-        {'monthly_cooling_peak_load': monthly_cooling_peak_load},
-        {'yearly_cooling_peak_load': yearly_cooling_peak_load},
-        {'monthly_heating_peak_load': monthly_heating_peak_load},
-        {'yearly_heating_peak_load': yearly_heating_peak_load},
-        {'monthly_lighting_peak_load': monthly_lighting_peak_load},
-        {'yearly_lighting_peak_load': yearly_lighting_peak_load},
-        {'monthly_appliances_peak_load': monthly_appliances_peak_load},
-        {'yearly_appliances_peak_load': yearly_appliances_peak_load},
-        {'monthly_cooling_demand': monthly_cooling_demand},
-        {'yearly_cooling_demand': yearly_cooling_demand},
-        {'monthly_heating_demand': monthly_heating_demand},
-        {'yearly_heating_demand': yearly_heating_demand},
-        {'monthly_lighting_electrical_demand': monthly_lighting_electrical_demand},
-        {'yearly_lighting_electrical_demand': yearly_lighting_electrical_demand},
-        {'monthly_appliances_electrical_demand': monthly_appliances_electrical_demand},
-        {'yearly_appliances_electrical_demand': yearly_appliances_electrical_demand},
-        {'monthly_domestic_hot_water_heat_demand': monthly_domestic_hot_water_heat_demand},
-        {'yearly_domestic_hot_water_heat_demand': yearly_domestic_hot_water_heat_demand},
-        {'monthly_heating_consumption': monthly_heating_consumption},
-        {'yearly_heating_consumption': yearly_heating_consumption},
-        {'monthly_cooling_consumption': monthly_cooling_consumption},
-        {'yearly_cooling_consumption': yearly_cooling_consumption},
-        {'monthly_domestic_hot_water_consumption': monthly_domestic_hot_water_consumption},
-        {'yearly_domestic_hot_water_consumption': yearly_domestic_hot_water_consumption},
-        {'monthly_distribution_systems_electrical_consumption': monthly_distribution_systems_electrical_consumption},
-        {'yearly_distribution_systems_electrical_consumption': yearly_distribution_systems_electrical_consumption},
-        {'monthly_on_site_electrical_production': monthly_on_site_electrical_production},
-        {'yearly_on_site_electrical_production': yearly_on_site_electrical_production}
-      ]})
+      results = {cte.INSEL_MEB: {
+        'monthly_cooling_peak_load': monthly_cooling_peak_load,
+        'yearly_cooling_peak_load': yearly_cooling_peak_load,
+        'monthly_heating_peak_load': monthly_heating_peak_load,
+        'yearly_heating_peak_load': yearly_heating_peak_load,
+        'monthly_lighting_peak_load': monthly_lighting_peak_load,
+        'yearly_lighting_peak_load': yearly_lighting_peak_load,
+        'monthly_appliances_peak_load': monthly_appliances_peak_load,
+        'yearly_appliances_peak_load': yearly_appliances_peak_load,
+        'monthly_cooling_demand': monthly_cooling_demand,
+        'yearly_cooling_demand': yearly_cooling_demand,
+        'monthly_heating_demand': monthly_heating_demand,
+        'yearly_heating_demand': yearly_heating_demand,
+        'monthly_lighting_electrical_demand': monthly_lighting_electrical_demand,
+        'yearly_lighting_electrical_demand': yearly_lighting_electrical_demand,
+        'monthly_appliances_electrical_demand': monthly_appliances_electrical_demand,
+        'yearly_appliances_electrical_demand': yearly_appliances_electrical_demand,
+        'monthly_domestic_hot_water_heat_demand': monthly_domestic_hot_water_heat_demand,
+        'yearly_domestic_hot_water_heat_demand': yearly_domestic_hot_water_heat_demand,
+        'monthly_heating_consumption': monthly_heating_consumption,
+        'yearly_heating_consumption': yearly_heating_consumption,
+        'monthly_cooling_consumption': monthly_cooling_consumption,
+        'yearly_cooling_consumption': yearly_cooling_consumption,
+        'monthly_domestic_hot_water_consumption': monthly_domestic_hot_water_consumption,
+        'yearly_domestic_hot_water_consumption': yearly_domestic_hot_water_consumption,
+        'monthly_distribution_systems_electrical_consumption': monthly_distribution_systems_electrical_consumption,
+        'yearly_distribution_systems_electrical_consumption': yearly_distribution_systems_electrical_consumption,
+        'monthly_on_site_electrical_production': monthly_on_site_electrical_production,
+        'yearly_on_site_electrical_production': yearly_on_site_electrical_production
+      }}
 
       db_building_id = _building.id
       city_objects_id.append(db_building_id)