diff --git a/tempest/test.py b/tempest/test.py
index 052033d..ca41e08 100644
--- a/tempest/test.py
+++ b/tempest/test.py
@@ -139,7 +139,7 @@
         'object': CONF.object_storage_feature_enabled.discoverable_apis,
         'identity': CONF.identity_feature_enabled.api_extensions
     }
-    if len(config_dict[service]) == 0:
+    if not config_dict[service]:
         return False
     if config_dict[service][0] == 'all':
         return True
@@ -160,7 +160,7 @@
     """
 
     filters = CONF.compute_feature_enabled.scheduler_available_filters
-    if len(filters) == 0:
+    if not filters:
         return False
     if 'all' in filters:
         return True
@@ -634,7 +634,7 @@
         """
         if msg is None:
             msg = "sequence or collection is not empty: %s" % items
-        self.assertEqual(0, len(items), msg)
+        self.assertFalse(items, msg)
 
     def assertNotEmpty(self, items, msg=None):
         """Asserts whether a sequence or collection is not empty
@@ -645,4 +645,4 @@
         """
         if msg is None:
             msg = "sequence or collection is empty."
-        self.assertGreater(len(items), 0, msg)
+        self.assertTrue(items, msg)