diff --git a/manila/tests/api/openstack/test_wsgi.py b/manila/tests/api/openstack/test_wsgi.py
index a98f241523..7a8c6529dd 100644
--- a/manila/tests/api/openstack/test_wsgi.py
+++ b/manila/tests/api/openstack/test_wsgi.py
@@ -800,7 +800,7 @@ class ResponseObjectTest(test.TestCase):
         robj = wsgi.ResponseObject({})
         robj['Header'] = 'foo'
         del robj['hEADER']
-        self.assertFalse('header' in robj.headers)
+        self.assertNotIn('header', robj.headers)
 
     def test_header_isolation(self):
         robj = wsgi.ResponseObject({})
diff --git a/manila/tests/api/test_versions.py b/manila/tests/api/test_versions.py
index c08ef8d37d..c8b59a14f7 100644
--- a/manila/tests/api/test_versions.py
+++ b/manila/tests/api/test_versions.py
@@ -185,7 +185,7 @@ class ExperimentalAPITestCase(test.TestCase):
             self.assertEqual(experimental,
                              response.headers.get(experimental_header_name))
         else:
-            self.assertFalse(experimental_header_name in response.headers)
+            self.assertNotIn(experimental_header_name, response.headers)
 
     def test_experimental_api_called_when_requested(self):
 
@@ -205,7 +205,7 @@ class ExperimentalAPITestCase(test.TestCase):
         response = self.req.get_response(self.app)
 
         self.assertEqual(404, response.status_int)
-        self.assertFalse(experimental_header_name in response.headers)
+        self.assertNotIn(experimental_header_name, response.headers)
 
     def test_experimental_header_returned_in_exception(self):
 
diff --git a/manila/tests/api/v1/test_share_networks.py b/manila/tests/api/v1/test_share_networks.py
index 1e9cb1a0e5..5e1c561530 100644
--- a/manila/tests/api/v1/test_share_networks.py
+++ b/manila/tests/api/v1/test_share_networks.py
@@ -108,9 +108,9 @@ class ShareNetworkAPITest(test.TestCase):
 
         self.assertEqual(share_nw['created_at'], view['created_at'])
         self.assertEqual(share_nw['updated_at'], view['updated_at'])
-        self.assertFalse('shares' in view)
-        self.assertFalse('network_allocations' in view)
-        self.assertFalse('security_services' in view)
+        self.assertNotIn('shares', view)
+        self.assertNotIn('network_allocations', view)
+        self.assertNotIn('security_services', view)
 
     @ddt.data(
         {'nova_net_id': 'fake_nova_net_id'},
diff --git a/manila/tests/db/migrations/alembic/test_migration.py b/manila/tests/db/migrations/alembic/test_migration.py
index e60868db5c..1bffda7198 100644
--- a/manila/tests/db/migrations/alembic/test_migration.py
+++ b/manila/tests/db/migrations/alembic/test_migration.py
@@ -186,7 +186,7 @@ class TestManilaMigrationsMySQL(ManilaMigrationsCheckers,
             text(sanity_check),
             database=self.engine.url.database)
 
-        self.assertTrue(total.scalar() > 0, "No tables found. Wrong schema?")
+        self.assertGreater(total.scalar(), 0, "No tables found. Wrong schema?")
 
         noninnodb_query = """
             SELECT count(*)
diff --git a/manila/tests/db/sqlalchemy/test_api.py b/manila/tests/db/sqlalchemy/test_api.py
index 0a05bee130..106ce3c457 100644
--- a/manila/tests/db/sqlalchemy/test_api.py
+++ b/manila/tests/db/sqlalchemy/test_api.py
@@ -309,7 +309,7 @@ class ShareDatabaseAPITestCase(test.TestCase):
                     self.assertTrue(expected_ss_keys.issubset(
                         replica['share_server'].keys()))
                 else:
-                    self.assertFalse('share_server' in replica.keys())
+                    self.assertNotIn('share_server', replica.keys())
                     self.assertEqual(
                         with_share_data,
                         expected_share_keys.issubset(replica.keys()))
@@ -358,7 +358,7 @@ class ShareDatabaseAPITestCase(test.TestCase):
                     self.assertTrue(expected_ss_keys.issubset(
                         replica['share_server'].keys()))
                 else:
-                    self.assertFalse('share_server' in replica.keys())
+                    self.assertNotIn('share_server', replica.keys())
                 self.assertEqual(with_share_data,
                                  expected_share_keys.issubset(replica.keys()))
 
@@ -1125,7 +1125,7 @@ class ShareInstanceExportLocationsMetadataDatabaseAPITestCase(test.TestCase):
         for el in els:
             if el.path == path:
                 export_location_uuid = el.uuid
-        self.assertFalse(export_location_uuid is None)
+        self.assertIsNotNone(export_location_uuid)
         return export_location_uuid
 
     def test_get_export_locations_by_share_id(self):
@@ -1529,7 +1529,7 @@ class ShareNetworkDatabaseAPITestCase(BaseDatabaseAPITestCase):
             filter_by(security_service_id=security_dict1['id']).\
             filter_by(share_network_id=self.share_nw_dict['id']).first()
 
-        self.assertTrue(result is not None)
+        self.assertIsNotNone(result)
 
     def test_add_security_service_not_found_01(self):
         security_service_id = 'unknown security service'
@@ -1593,7 +1593,7 @@ class ShareNetworkDatabaseAPITestCase(BaseDatabaseAPITestCase):
             filter_by(security_service_id=security_dict1['id']).\
             filter_by(share_network_id=self.share_nw_dict['id']).first()
 
-        self.assertTrue(result is None)
+        self.assertIsNone(result)
 
         share_nw_ref = db_api.share_network_get(self.fake_context,
                                                 self.share_nw_dict['id'])
diff --git a/manila/tests/share/test_manager.py b/manila/tests/share/test_manager.py
index 9322a3f943..28f2ff9019 100644
--- a/manila/tests/share/test_manager.py
+++ b/manila/tests/share/test_manager.py
@@ -531,7 +531,7 @@ class ShareManagerTestCase(test.TestCase):
 
         shr = db.share_get(self.context, share_id)
         self.assertEqual(constants.STATUS_AVAILABLE, shr['status'])
-        self.assertTrue(len(shr['export_location']) > 0)
+        self.assertGreater(len(shr['export_location']), 0)
         self.assertEqual(2, len(shr['export_locations']))
 
     def test_create_share_instance_for_share_with_replication_support(self):
@@ -1174,8 +1174,8 @@ class ShareManagerTestCase(test.TestCase):
 
         self.assertEqual(2, mock_export_locs_update.call_count)
         self.assertEqual(2, mock_replica_update.call_count)
-        self.assertTrue(
-            reset_replication_change_call in mock_replica_update.mock_calls)
+        self.assertIn(
+            reset_replication_change_call, mock_replica_update.mock_calls)
         self.assertTrue(mock_info_log.called)
         self.assertFalse(mock_snap_instance_update.called)
 
@@ -1739,7 +1739,7 @@ class ShareManagerTestCase(test.TestCase):
         shr = db.share_get(self.context, share_id)
         self.assertEqual(shr['status'], constants.STATUS_AVAILABLE)
         self.assertEqual(shr['share_server_id'], share_srv['id'])
-        self.assertTrue(len(shr['export_location']) > 0)
+        self.assertGreater(len(shr['export_location']), 0)
         self.assertEqual(1, len(shr['export_locations']))
         manager.LOG.info.assert_called_with(mock.ANY, share.instance['id'])
 
diff --git a/manila/tests/test_utils.py b/manila/tests/test_utils.py
index 68aa641c4a..c5e1ad33c7 100644
--- a/manila/tests/test_utils.py
+++ b/manila/tests/test_utils.py
@@ -399,20 +399,20 @@ class MonkeyPatchTestCase(test.TestCase):
 
         self.assertEqual(8, ret_b)
         package_a = self.example_package + 'example_a.'
-        self.assertTrue(package_a + 'example_function_a'
-                        in manila.tests.monkey_patch_example.CALLED_FUNCTION)
+        self.assertIn(package_a + 'example_function_a',
+                      manila.tests.monkey_patch_example.CALLED_FUNCTION)
 
-        self.assertTrue(package_a + 'ExampleClassA.example_method'
-                        in manila.tests.monkey_patch_example.CALLED_FUNCTION)
-        self.assertTrue(package_a + 'ExampleClassA.example_method_add'
-                        in manila.tests.monkey_patch_example.CALLED_FUNCTION)
+        self.assertIn(package_a + 'ExampleClassA.example_method',
+                      manila.tests.monkey_patch_example.CALLED_FUNCTION)
+        self.assertIn(package_a + 'ExampleClassA.example_method_add',
+                      manila.tests.monkey_patch_example.CALLED_FUNCTION)
         package_b = self.example_package + 'example_b.'
-        self.assertFalse(package_b + 'example_function_b'
-                         in manila.tests.monkey_patch_example.CALLED_FUNCTION)
-        self.assertFalse(package_b + 'ExampleClassB.example_method'
-                         in manila.tests.monkey_patch_example.CALLED_FUNCTION)
-        self.assertFalse(package_b + 'ExampleClassB.example_method_add'
-                         in manila.tests.monkey_patch_example.CALLED_FUNCTION)
+        self.assertNotIn(package_b + 'example_function_b',
+                         manila.tests.monkey_patch_example.CALLED_FUNCTION)
+        self.assertNotIn(package_b + 'ExampleClassB.example_method',
+                         manila.tests.monkey_patch_example.CALLED_FUNCTION)
+        self.assertNotIn(package_b + 'ExampleClassB.example_method_add',
+                         manila.tests.monkey_patch_example.CALLED_FUNCTION)
 
 
 class FakeSSHClient(object):
diff --git a/manila_tempest_tests/tests/api/admin/test_share_servers.py b/manila_tempest_tests/tests/api/admin/test_share_servers.py
index d01600ec32..25cc406b17 100644
--- a/manila_tempest_tests/tests/api/admin/test_share_servers.py
+++ b/manila_tempest_tests/tests/api/admin/test_share_servers.py
@@ -53,7 +53,7 @@ class ShareServersAdminTest(base.BaseSharesAdminTest):
     @tc.attr(base.TAG_POSITIVE, base.TAG_API_WITH_BACKEND)
     def test_list_share_servers_without_filters(self):
         servers = self.shares_client.list_share_servers()
-        self.assertTrue(len(servers) > 0)
+        self.assertGreater(len(servers), 0)
         keys = [
             "id",
             "host",
@@ -70,11 +70,11 @@ class ShareServersAdminTest(base.BaseSharesAdminTest):
             if server["updated_at"]:
                 self.assertTrue(self.date_re.match(server["updated_at"]))
             # Host is not empty
-            self.assertTrue(len(server["host"]) > 0)
+            self.assertGreater(len(server["host"]), 0)
             # Id is not empty
-            self.assertTrue(len(server["id"]) > 0)
+            self.assertGreater(len(server["id"]), 0)
             # Project id is not empty
-            self.assertTrue(len(server["project_id"]) > 0)
+            self.assertGreater(len(server["project_id"]), 0)
 
         # Do not verify statuses because we get all share servers from whole
         # cluster and here can be servers with any state.
@@ -103,7 +103,7 @@ class ShareServersAdminTest(base.BaseSharesAdminTest):
             raise lib_exc.NotFound(message=msg)
         search_opts = {"host": host}
         servers = self.shares_client.list_share_servers(search_opts)
-        self.assertTrue(len(servers) > 0)
+        self.assertGreater(len(servers), 0)
         for server in servers:
             self.assertEqual(server["host"], host)
 
@@ -129,7 +129,7 @@ class ShareServersAdminTest(base.BaseSharesAdminTest):
             raise lib_exc.NotFound(message=msg)
         search_opts = {"status": status}
         servers = self.shares_client.list_share_servers(search_opts)
-        self.assertTrue(len(servers) > 0)
+        self.assertGreater(len(servers), 0)
         for server in servers:
             self.assertEqual(server["status"], status)
 
@@ -138,7 +138,7 @@ class ShareServersAdminTest(base.BaseSharesAdminTest):
         search_opts = {"project_id": self.share_network["project_id"]}
         servers = self.shares_client.list_share_servers(search_opts)
         # Should exist, at least, one share server, used by this test suite.
-        self.assertTrue(len(servers) > 0)
+        self.assertGreater(len(servers), 0)
         for server in servers:
             self.assertEqual(server["project_id"],
                              self.share_network["project_id"])
@@ -148,7 +148,7 @@ class ShareServersAdminTest(base.BaseSharesAdminTest):
         search_opts = {"share_network": self.share_network["name"]}
         servers = self.shares_client.list_share_servers(search_opts)
         # Should exist, at least, one share server, used by this test suite.
-        self.assertTrue(len(servers) > 0)
+        self.assertGreater(len(servers), 0)
         for server in servers:
             self.assertEqual(server["share_network_name"],
                              self.share_network["name"])
@@ -158,7 +158,7 @@ class ShareServersAdminTest(base.BaseSharesAdminTest):
         search_opts = {"share_network": self.share_network["id"]}
         servers = self.shares_client.list_share_servers(search_opts)
         # Should exist, at least, one share server, used by this test suite.
-        self.assertTrue(len(servers) > 0)
+        self.assertGreater(len(servers), 0)
         for server in servers:
             self.assertIn(server["share_network_name"],
                           self.sn_name_and_id)
@@ -186,15 +186,15 @@ class ShareServersAdminTest(base.BaseSharesAdminTest):
         if server["updated_at"]:
             self.assertTrue(self.date_re.match(server["updated_at"]))
         # Host is not empty
-        self.assertTrue(len(server["host"]) > 0)
+        self.assertGreater(len(server["host"]), 0)
         # Id is not empty
-        self.assertTrue(len(server["id"]) > 0)
+        self.assertGreater(len(server["id"]), 0)
         # Project id is not empty
-        self.assertTrue(len(server["project_id"]) > 0)
+        self.assertGreater(len(server["project_id"]), 0)
         # Status is not empty
-        self.assertTrue(len(server["status"]) > 0)
+        self.assertGreater(len(server["status"]), 0)
         # share_network_name is not empty
-        self.assertTrue(len(server["share_network_name"]) > 0)
+        self.assertGreater(len(server["share_network_name"]), 0)
         # backend_details should be a dict
         self.assertIsInstance(server["backend_details"], dict)
 
diff --git a/manila_tempest_tests/tests/api/admin/test_share_types.py b/manila_tempest_tests/tests/api/admin/test_share_types.py
index c9671c3da2..af354bbc55 100644
--- a/manila_tempest_tests/tests/api/admin/test_share_types.py
+++ b/manila_tempest_tests/tests/api/admin/test_share_types.py
@@ -100,7 +100,7 @@ class ShareTypesAdminTest(base.BaseSharesAdminTest):
         # list share types
         st_list = self.shares_v2_client.list_share_types(version=version)
         sts = st_list["share_types"]
-        self.assertTrue(len(sts) >= 1)
+        self.assertGreaterEqual(len(sts), 1)
         self.assertTrue(any(st_id in st["id"] for st in sts))
         for st in sts:
             self._verify_is_public_key_name(st, version)
diff --git a/manila_tempest_tests/tests/api/admin/test_shares_actions.py b/manila_tempest_tests/tests/api/admin/test_shares_actions.py
index 72edd6b1f3..eb049c61ad 100644
--- a/manila_tempest_tests/tests/api/admin/test_shares_actions.py
+++ b/manila_tempest_tests/tests/api/admin/test_shares_actions.py
@@ -150,7 +150,7 @@ class SharesActionsAdminTest(base.BaseSharesAdminTest):
         shares = self.shares_client.list_shares_with_detail(params=filters)
 
         # verify response
-        self.assertTrue(len(shares) > 0)
+        self.assertGreater(len(shares), 0)
         for share in shares:
             self.assertDictContainsSubset(
                 filters['metadata'], share['metadata'])
@@ -170,7 +170,7 @@ class SharesActionsAdminTest(base.BaseSharesAdminTest):
         shares = self.shares_client.list_shares_with_detail(params=filters)
 
         # verify response
-        self.assertTrue(len(shares) > 0)
+        self.assertGreater(len(shares), 0)
         shares_ids = [s["id"] for s in shares]
         for share in self.shares:
             self.assertIn(share["id"], shares_ids)
@@ -198,7 +198,7 @@ class SharesActionsAdminTest(base.BaseSharesAdminTest):
         shares = self.shares_client.list_shares_with_detail(params=filters)
 
         # verify response
-        self.assertTrue(len(shares) > 0)
+        self.assertGreater(len(shares), 0)
         for share in shares:
             st_list = self.shares_client.list_share_types()
             # find its name or id, get id
@@ -229,7 +229,7 @@ class SharesActionsAdminTest(base.BaseSharesAdminTest):
         shares = self.shares_client.list_shares_with_detail(params=filters)
 
         # verify response
-        self.assertTrue(len(shares) > 0)
+        self.assertGreater(len(shares), 0)
         for share in shares:
             self.assertEqual(filters['host'], share['host'])
 
@@ -244,7 +244,7 @@ class SharesActionsAdminTest(base.BaseSharesAdminTest):
         shares = self.shares_client.list_shares_with_detail(params=filters)
 
         # verify response
-        self.assertTrue(len(shares) > 0)
+        self.assertGreater(len(shares), 0)
         for share in shares:
             self.assertEqual(
                 filters['share_network_id'], share['share_network_id'])
@@ -259,7 +259,7 @@ class SharesActionsAdminTest(base.BaseSharesAdminTest):
         shares = self.shares_client.list_shares_with_detail(params=filters)
 
         # verify response
-        self.assertTrue(len(shares) > 0)
+        self.assertGreater(len(shares), 0)
         for share in shares:
             self.assertEqual(filters['snapshot_id'], share['snapshot_id'])
         self.assertFalse(self.shares[0]['id'] in [s['id'] for s in shares])
@@ -272,7 +272,7 @@ class SharesActionsAdminTest(base.BaseSharesAdminTest):
         shares = self.shares_client.list_shares_with_detail(params=filters)
 
         # verify response
-        self.assertTrue(len(shares) > 0)
+        self.assertGreater(len(shares), 0)
         sorted_list = [share['created_at'] for share in shares]
         self.assertEqual(sorted(sorted_list), sorted_list)
 
@@ -295,7 +295,7 @@ class SharesActionsAdminTest(base.BaseSharesAdminTest):
         # list shares by active status, at least one share is expected
         params = {"status": "available"}
         shares = self.shares_client.list_shares_with_detail(params)
-        self.assertTrue(len(shares) > 0)
+        self.assertGreater(len(shares), 0)
         for share in shares:
             self.assertEqual(params["status"], share["status"])
 
diff --git a/manila_tempest_tests/tests/api/test_availability_zones.py b/manila_tempest_tests/tests/api/test_availability_zones.py
index 0b4739b71e..0d870369a9 100644
--- a/manila_tempest_tests/tests/api/test_availability_zones.py
+++ b/manila_tempest_tests/tests/api/test_availability_zones.py
@@ -21,7 +21,7 @@ from manila_tempest_tests.tests.api import base
 class AvailabilityZonesTest(base.BaseSharesTest):
 
     def _list_availability_zones_assertions(self, availability_zones):
-        self.assertTrue(len(availability_zones) > 0)
+        self.assertGreater(len(availability_zones), 0)
         keys = ("created_at", "updated_at", "name", "id")
         for az in availability_zones:
             self.assertEqual(len(keys), len(az))
diff --git a/manila_tempest_tests/tests/api/test_share_networks.py b/manila_tempest_tests/tests/api/test_share_networks.py
index 430fba87b6..577c5a4eca 100644
--- a/manila_tempest_tests/tests/api/test_share_networks.py
+++ b/manila_tempest_tests/tests/api/test_share_networks.py
@@ -94,8 +94,8 @@ class ShareNetworkListMixin(object):
         for sn in listed:
             self.assertTrue(all(sn[key] == value for key, value in
                                 six.iteritems(valid_filter_opts)))
-            self.assertTrue(sn['created_at'] <= created_before)
-            self.assertTrue(sn['created_at'] >= created_since)
+            self.assertLessEqual(sn['created_at'], created_before)
+            self.assertGreaterEqual(sn['created_at'], created_since)
 
 
 class ShareNetworksTest(base.BaseSharesTest, ShareNetworkListMixin):
diff --git a/manila_tempest_tests/tests/api/test_shares_actions.py b/manila_tempest_tests/tests/api/test_shares_actions.py
index 60fd61517d..da44c7caa1 100644
--- a/manila_tempest_tests/tests/api/test_shares_actions.py
+++ b/manila_tempest_tests/tests/api/test_shares_actions.py
@@ -255,7 +255,7 @@ class SharesActionsTest(base.BaseSharesTest):
         shares = self.shares_client.list_shares_with_detail(params=filters)
 
         # verify response
-        self.assertTrue(len(shares) > 0)
+        self.assertGreater(len(shares), 0)
         for share in shares:
             self.assertDictContainsSubset(
                 filters['metadata'], share['metadata'])
@@ -271,7 +271,7 @@ class SharesActionsTest(base.BaseSharesTest):
         shares = self.shares_client.list_shares_with_detail(params=filters)
 
         # verify response
-        self.assertTrue(len(shares) > 0)
+        self.assertGreater(len(shares), 0)
         for share in shares:
             self.assertEqual(filters['host'], share['host'])
 
@@ -286,7 +286,7 @@ class SharesActionsTest(base.BaseSharesTest):
         shares = self.shares_client.list_shares_with_detail(params=filters)
 
         # verify response
-        self.assertTrue(len(shares) > 0)
+        self.assertGreater(len(shares), 0)
         for share in shares:
             self.assertEqual(
                 filters['share_network_id'], share['share_network_id'])
@@ -301,7 +301,7 @@ class SharesActionsTest(base.BaseSharesTest):
         shares = self.shares_client.list_shares_with_detail(params=filters)
 
         # verify response
-        self.assertTrue(len(shares) > 0)
+        self.assertGreater(len(shares), 0)
         for share in shares:
             self.assertEqual(filters['snapshot_id'], share['snapshot_id'])
         self.assertFalse(self.shares[0]['id'] in [s['id'] for s in shares])
@@ -314,7 +314,7 @@ class SharesActionsTest(base.BaseSharesTest):
         shares = self.shares_client.list_shares_with_detail(params=filters)
 
         # verify response
-        self.assertTrue(len(shares) > 0)
+        self.assertGreater(len(shares), 0)
         sorted_list = [share['created_at'] for share in shares]
         self.assertEqual(sorted(sorted_list), sorted_list)
 
@@ -337,7 +337,7 @@ class SharesActionsTest(base.BaseSharesTest):
         # list shares by active status, at least one share is expected
         params = {"status": "available"}
         shares = self.shares_client.list_shares_with_detail(params)
-        self.assertTrue(len(shares) > 0)
+        self.assertGreater(len(shares), 0)
         for share in shares:
             self.assertEqual(params["status"], share["status"])
 
@@ -353,7 +353,7 @@ class SharesActionsTest(base.BaseSharesTest):
         # non-admin user can get shares only from his project
         params = {"all_tenants": 1}
         shares = self.shares_client.list_shares_with_detail(params)
-        self.assertTrue(len(shares) > 0)
+        self.assertGreater(len(shares), 0)
 
         # get share with detailed info, we need its 'project_id'
         share = self.shares_client.get_share(self.shares[0]["id"])
@@ -533,7 +533,7 @@ class SharesActionsTest(base.BaseSharesTest):
             params=filters)
 
         # verify response
-        self.assertTrue(len(snaps) > 0)
+        self.assertGreater(len(snaps), 0)
         for snap in snaps:
             self.assertEqual(filters['status'], snap['status'])
             self.assertEqual(filters['name'], snap['name'])
@@ -549,7 +549,7 @@ class SharesActionsTest(base.BaseSharesTest):
             params=filters)
 
         # verify response
-        self.assertTrue(len(snaps) > 0)
+        self.assertGreater(len(snaps), 0)
         sorted_list = [snap['share_id'] for snap in snaps]
         self.assertEqual(sorted(sorted_list), sorted_list)