diff --git a/tempest/api/compute/admin/test_hosts.py b/tempest/api/compute/admin/test_hosts.py
index aa769ba..8ec5a84 100644
--- a/tempest/api/compute/admin/test_hosts.py
+++ b/tempest/api/compute/admin/test_hosts.py
@@ -39,7 +39,7 @@
     def test_list_hosts(self):
         resp, hosts = self.client.list_hosts()
         self.assertEqual(200, resp.status)
-        self.assertTrue(len(hosts) >= 2)
+        self.assertTrue(len(hosts) >= 2, str(hosts))
 
     @attr(type='gate')
     def test_list_hosts_with_zone(self):
diff --git a/tempest/api/compute/servers/test_instance_actions.py b/tempest/api/compute/servers/test_instance_actions.py
index 61be50a..99c2b9f 100644
--- a/tempest/api/compute/servers/test_instance_actions.py
+++ b/tempest/api/compute/servers/test_instance_actions.py
@@ -39,7 +39,7 @@
 
         resp, body = self.client.list_instance_actions(self.server_id)
         self.assertEqual(200, resp.status)
-        self.assertTrue(len(body) == 2)
+        self.assertTrue(len(body) == 2, str(body))
         self.assertTrue(any([i for i in body if i['action'] == 'create']))
         self.assertTrue(any([i for i in body if i['action'] == 'reboot']))
 
diff --git a/tempest/api/network/test_routers.py b/tempest/api/network/test_routers.py
index 2cfbf61..c72c1fa 100644
--- a/tempest/api/network/test_routers.py
+++ b/tempest/api/network/test_routers.py
@@ -103,8 +103,8 @@
         self.assertEqual('200', resp['status'])
         self.addCleanup(self._remove_router_interface_with_subnet_id,
                         router['id'], subnet['id'])
-        self.assertTrue('subnet_id' in interface.keys())
-        self.assertTrue('port_id' in interface.keys())
+        self.assertIn('subnet_id', interface.keys())
+        self.assertIn('port_id', interface.keys())
         # Verify router id is equal to device id in port details
         resp, show_port_body = self.client.show_port(
             interface['port_id'])
@@ -123,8 +123,8 @@
         self.assertEqual('200', resp['status'])
         self.addCleanup(self._remove_router_interface_with_port_id,
                         router['id'], port_body['port']['id'])
-        self.assertTrue('subnet_id' in interface.keys())
-        self.assertTrue('port_id' in interface.keys())
+        self.assertIn('subnet_id', interface.keys())
+        self.assertIn('port_id', interface.keys())
         # Verify router id is equal to device id in port details
         resp, show_port_body = self.client.show_port(
             interface['port_id'])
diff --git a/tempest/api/object_storage/test_object_services.py b/tempest/api/object_storage/test_object_services.py
index 407c3ec..3389235 100644
--- a/tempest/api/object_storage/test_object_services.py
+++ b/tempest/api/object_storage/test_object_services.py
@@ -96,7 +96,7 @@
             self.container_name, object_name)
         self.assertIn(int(resp['status']), HTTP_SUCCESS)
         actual_meta_key = 'x-object-meta-' + meta_key
-        self.assertTrue(actual_meta_key in resp)
+        self.assertIn(actual_meta_key, resp)
         self.assertEqual(resp[actual_meta_key], meta_value)
 
     @attr(type='smoke')
@@ -220,7 +220,7 @@
                                                    object_name)
         self.assertEqual(body, data)
         actual_meta_key = 'x-object-meta-' + meta_key
-        self.assertTrue(actual_meta_key in resp)
+        self.assertIn(actual_meta_key, resp)
         self.assertEqual(resp[actual_meta_key], meta_value)
 
     @attr(type='gate')
diff --git a/tempest/api/volume/admin/test_volume_types_extra_specs.py b/tempest/api/volume/admin/test_volume_types_extra_specs.py
index d6dd7db..0892eae 100644
--- a/tempest/api/volume/admin/test_volume_types_extra_specs.py
+++ b/tempest/api/volume/admin/test_volume_types_extra_specs.py
@@ -47,8 +47,7 @@
             self.volume_type['id'])
         self.assertEqual(200, resp.status)
         self.assertIsInstance(body, dict)
-        self.assertTrue('spec1' in body, "Incorrect volume type extra"
-                        " spec returned")
+        self.assertIn('spec1', body)
 
     @attr(type='gate')
     def test_volume_type_extra_specs_update(self):
@@ -66,8 +65,7 @@
             extra_spec.keys()[0],
             extra_spec)
         self.assertEqual(200, resp.status)
-        self.assertTrue('spec2' in body,
-                        "Volume type extra spec incorrectly updated")
+        self.assertIn('spec2', body)
         self.assertEqual(extra_spec['spec2'], body['spec2'],
                          "Volume type extra spec incorrectly updated")