diff --git a/app/appdb.py b/app/appdb.py
index cd1a68394..f6a72a0a5 100644
--- a/app/appdb.py
+++ b/app/appdb.py
@@ -131,12 +131,13 @@ def get_images(site_id, vo):
         va_data = appdb_call('/rest/1.0/va_providers/%s' % site_id)
 
         images = []
-        if 'provider:image' in va_data['virtualization:provider'] and va_data['virtualization:provider']['provider:image']:
+        if ('provider:image' in va_data['virtualization:provider'] and
+                va_data['virtualization:provider']['provider:image']):
             if isinstance(va_data['virtualization:provider']['provider:image'], list):
                 images = va_data['virtualization:provider']['provider:image']
             else:
                 images = [va_data['virtualization:provider']['provider:image']]
-    
+
         for os_tpl in images:
             try:
                 if '@voname' in os_tpl and vo in os_tpl['@voname'] and os_tpl['@archived'] == "false":
@@ -144,7 +145,7 @@ def get_images(site_id, vo):
             except Exception:
                 continue
     except Exception:
-        pass
+        oss = []
 
     return oss
 
diff --git a/app/tests/test_appdb.py b/app/tests/test_appdb.py
index 9a2b22e78..012bab65a 100644
--- a/app/tests/test_appdb.py
+++ b/app/tests/test_appdb.py
@@ -123,7 +123,6 @@ def test_get_project_ids(self, appdb_call):
         self.assertEquals(res, {"vo.access.egi.eu": "3a8e9d966e644405bf19b536adf7743d",
                                 "covid-19.eosc-synergy.eu": "972298c557184a2192ebc861f3184da8"})
 
-
     @patch('app.appdb.appdb_call')
     def test_get_images(self, appdb_call):
         images = """<virtualization:provider id="11548G0">
@@ -133,5 +132,6 @@ def test_get_images(self, appdb_call):
         res = appdb.get_images('11548G0', 'vo.access.egi.eu')
         self.assertEquals(res, ["scipioncloud.gpu"])
 
+
 if __name__ == '__main__':
     unittest.main()