diff --git a/tempest/api/identity/v2/test_api_discovery.py b/tempest/api/identity/v2/test_api_discovery.py
index 5b9d38c..afda104 100644
--- a/tempest/api/identity/v2/test_api_discovery.py
+++ b/tempest/api/identity/v2/test_api_discovery.py
@@ -18,11 +18,12 @@
 
 
 class TestApiDiscovery(base.BaseIdentityV2Test):
-    """Tests for API discovery features."""
+    """Tests for identity v2 API discovery features."""
 
     @decorators.attr(type='smoke')
     @decorators.idempotent_id('ea889a68-a15f-4166-bfb1-c12456eae853')
     def test_api_version_resources(self):
+        """Test showing identity v2 api version resources"""
         descr = self.non_admin_client.show_api_description()['version']
         expected_resources = ('id', 'links', 'media-types', 'status',
                               'updated')
@@ -34,6 +35,7 @@
     @decorators.attr(type='smoke')
     @decorators.idempotent_id('007a0be0-78fe-4fdb-bbee-e9216cc17bb2')
     def test_api_media_types(self):
+        """Test showing identity v2 api version media type"""
         descr = self.non_admin_client.show_api_description()['version']
         # Get MIME type bases and descriptions
         media_types = [(media_type['base'], media_type['type']) for
@@ -49,6 +51,7 @@
     @decorators.attr(type='smoke')
     @decorators.idempotent_id('77fd6be0-8801-48e6-b9bf-38cdd2f253ec')
     def test_api_version_statuses(self):
+        """Test showing identity v2 api version status"""
         descr = self.non_admin_client.show_api_description()['version']
         status = descr['status'].lower()
         supported_statuses = ['current', 'stable', 'experimental',
diff --git a/tempest/api/identity/v2/test_extension.py b/tempest/api/identity/v2/test_extension.py
index c538c14..13555bd 100644
--- a/tempest/api/identity/v2/test_extension.py
+++ b/tempest/api/identity/v2/test_extension.py
@@ -18,10 +18,11 @@
 
 
 class ExtensionTestJSON(base.BaseIdentityV2Test):
+    """Test extensions in identity v2 API"""
 
     @decorators.idempotent_id('85f3f661-f54c-4d48-b563-72ae952b9383')
     def test_list_extensions(self):
-        # List all the extensions
+        """List all the identity extensions via v2 API"""
         body = self.non_admin_client.list_extensions()['extensions']['values']
         self.assertNotEmpty(body)
         keys = ['name', 'updated', 'alias', 'links',
diff --git a/tempest/api/identity/v2/test_tenants.py b/tempest/api/identity/v2/test_tenants.py
index b2a6d13..1752b65 100644
--- a/tempest/api/identity/v2/test_tenants.py
+++ b/tempest/api/identity/v2/test_tenants.py
@@ -19,11 +19,13 @@
 
 
 class IdentityTenantsTest(base.BaseIdentityV2Test):
+    """Test listing tenants in identity v2 API"""
 
     credentials = ['primary', 'alt']
 
     @decorators.idempotent_id('ecae2459-243d-4ba1-ad02-65f15dc82b78')
     def test_list_tenants_returns_only_authorized_tenants(self):
+        """Test listing tenants only returns authorized tenants via v2 API"""
         alt_tenant_name = self.os_alt.credentials.tenant_name
         resp = self.non_admin_tenants_client.list_tenants()
 
diff --git a/tempest/api/identity/v2/test_tokens.py b/tempest/api/identity/v2/test_tokens.py
index 64b81c2..a928ad9 100644
--- a/tempest/api/identity/v2/test_tokens.py
+++ b/tempest/api/identity/v2/test_tokens.py
@@ -20,10 +20,11 @@
 
 
 class TokensTest(base.BaseIdentityV2Test):
+    """Test tokens in identity v2 API"""
 
     @decorators.idempotent_id('65ae3b78-91ff-467b-a705-f6678863b8ec')
     def test_create_token(self):
-
+        """Test creating token for user via v2 API"""
         token_client = self.non_admin_token_client
 
         # get a token for the user
diff --git a/tempest/api/identity/v2/test_users.py b/tempest/api/identity/v2/test_users.py
index 2eea860..a63b45c 100644
--- a/tempest/api/identity/v2/test_users.py
+++ b/tempest/api/identity/v2/test_users.py
@@ -28,6 +28,7 @@
 
 
 class IdentityUsersTest(base.BaseIdentityV2Test):
+    """Test user password in identity v2 API"""
 
     @classmethod
     def resource_setup(cls):
@@ -85,6 +86,7 @@
                       'immutable user source and solely '
                       'provides read-only access to users.')
     def test_user_update_own_password(self):
+        """test updating user's own password via v2 API"""
         old_pass = self.creds.password
         old_token = self.non_admin_users_client.token
         new_pass = data_utils.rand_password()
diff --git a/tempest/api/identity/v3/test_api_discovery.py b/tempest/api/identity/v3/test_api_discovery.py
index e87d1cd..ebb96fd 100644
--- a/tempest/api/identity/v3/test_api_discovery.py
+++ b/tempest/api/identity/v3/test_api_discovery.py
@@ -22,10 +22,11 @@
 
 
 class TestApiDiscovery(base.BaseIdentityV3Test):
-    """Tests for API discovery features."""
+    """Tests for identity API discovery features."""
 
     @decorators.idempotent_id('79aec9ae-710f-4c54-a4fc-3aa25b4feac3')
     def test_identity_v3_existence(self):
+        """Test that identity v3 version should exist"""
         versions = self.non_admin_versions_client.list_versions()
         found = any(
             "v3" in version.get('id')
@@ -35,9 +36,12 @@
     @decorators.idempotent_id('721f480f-35b6-46c7-846e-047e6acea0dc')
     @decorators.attr(type='smoke')
     def test_list_api_versions(self):
-        # NOTE: Actually this API doesn't depend on v3 API at all, because
-        # the API operation is "GET /" without v3's endpoint. The reason of
-        # this test path is just v3 API is CURRENT on Keystone side.
+        """Test listing identity api versions
+
+        NOTE: Actually this API doesn't depend on v3 API at all, because
+        the API operation is "GET /" without v3's endpoint. The reason of
+        this test path is just v3 API is CURRENT on Keystone side.
+        """
         versions = self.non_admin_versions_client.list_versions()
         expected_resources = ('id', 'links', 'media-types', 'status',
                               'updated')
@@ -49,6 +53,7 @@
     @decorators.attr(type='smoke')
     @decorators.idempotent_id('b9232f5e-d9e5-4d97-b96c-28d3db4de1bd')
     def test_api_version_resources(self):
+        """Test showing identity v3 api version resources"""
         descr = self.non_admin_client.show_api_description()['version']
         expected_resources = ('id', 'links', 'media-types', 'status',
                               'updated')
@@ -60,6 +65,7 @@
     @decorators.attr(type='smoke')
     @decorators.idempotent_id('657c1970-4722-4189-8831-7325f3bc4265')
     def test_api_media_types(self):
+        """Test showing identity v3 api version media type"""
         descr = self.non_admin_client.show_api_description()['version']
         # Get MIME type bases and descriptions
         media_types = [(media_type['base'], media_type['type']) for
@@ -75,6 +81,7 @@
     @decorators.attr(type='smoke')
     @decorators.idempotent_id('8879a470-abfb-47bb-bb8d-5a7fd279ad1e')
     def test_api_version_statuses(self):
+        """Test showing identity v3 api version status"""
         descr = self.non_admin_client.show_api_description()['version']
         status = descr['status'].lower()
         supported_statuses = ['current', 'stable', 'experimental',
diff --git a/tempest/api/identity/v3/test_domains.py b/tempest/api/identity/v3/test_domains.py
index 9f132dd..bb62ea6 100644
--- a/tempest/api/identity/v3/test_domains.py
+++ b/tempest/api/identity/v3/test_domains.py
@@ -21,6 +21,7 @@
 
 
 class DefaultDomainTestJSON(base.BaseIdentityV3Test):
+    """Test identity default domains"""
 
     @classmethod
     def setup_clients(cls):
@@ -35,5 +36,6 @@
     @decorators.attr(type='smoke')
     @decorators.idempotent_id('17a5de24-e6a0-4e4a-a9ee-d85b6e5612b5')
     def test_default_domain_exists(self):
+        """Test showing default domain"""
         domain = self.domains_client.show_domain(self.domain_id)['domain']
         self.assertTrue(domain['enabled'])
diff --git a/tempest/api/identity/v3/test_projects.py b/tempest/api/identity/v3/test_projects.py
index bbb4013..338b57b 100644
--- a/tempest/api/identity/v3/test_projects.py
+++ b/tempest/api/identity/v3/test_projects.py
@@ -19,11 +19,13 @@
 
 
 class IdentityV3ProjectsTest(base.BaseIdentityV3Test):
+    """Test identity projects"""
 
     credentials = ['primary', 'alt']
 
     @decorators.idempotent_id('86128d46-e170-4644-866a-cc487f699e1d')
     def test_list_projects_returns_only_authorized_projects(self):
+        """Test listing projects only returns authorized projects"""
         alt_project_name = self.os_alt.credentials.project_name
         resp = self.non_admin_users_client.list_user_projects(
             self.os_primary.credentials.user_id)
diff --git a/tempest/api/identity/v3/test_tokens.py b/tempest/api/identity/v3/test_tokens.py
index cb05f39..b201285 100644
--- a/tempest/api/identity/v3/test_tokens.py
+++ b/tempest/api/identity/v3/test_tokens.py
@@ -24,9 +24,11 @@
 
 
 class TokensV3Test(base.BaseIdentityV3Test):
+    """Test identity tokens"""
 
     @decorators.idempotent_id('a9512ac3-3909-48a4-b395-11f438e16260')
     def test_validate_token(self):
+        """Test validating token for user"""
         creds = self.os_primary.credentials
         user_id = creds.user_id
         username = creds.username
@@ -69,7 +71,7 @@
 
     @decorators.idempotent_id('6f8e4436-fc96-4282-8122-e41df57197a9')
     def test_create_token(self):
-
+        """Test creating token for user"""
         creds = self.os_primary.credentials
         user_id = creds.user_id
         username = creds.username
@@ -120,9 +122,12 @@
 
     @decorators.idempotent_id('0f9f5a5f-d5cd-4a86-8a5b-c5ded151f212')
     def test_token_auth_creation_existence_deletion(self):
-        # Tests basic token auth functionality in a way that is compatible with
-        # pre-provisioned credentials. The default user is used for token
-        # authentication.
+        """Test auth/check existence/delete token for user
+
+        Tests basic token auth functionality in a way that is compatible with
+        pre-provisioned credentials. The default user is used for token
+        authentication.
+        """
 
         # Valid user's token is authenticated
         user = self.os_primary.credentials
diff --git a/tempest/api/identity/v3/test_users.py b/tempest/api/identity/v3/test_users.py
index d4e7612..6425ea9 100644
--- a/tempest/api/identity/v3/test_users.py
+++ b/tempest/api/identity/v3/test_users.py
@@ -28,6 +28,7 @@
 
 
 class IdentityV3UsersTest(base.BaseIdentityV3Test):
+    """Test identity user password"""
 
     @classmethod
     def resource_setup(cls):
@@ -82,6 +83,7 @@
                       'immutable user source and solely '
                       'provides read-only access to users.')
     def test_user_update_own_password(self):
+        """Test updating user's own password"""
         old_pass = self.creds.password
         old_token = self.non_admin_client.token
         new_pass = data_utils.rand_password()
@@ -111,6 +113,7 @@
                       'immutable user source and solely '
                       'provides read-only access to users.')
     def test_password_history_check_self_service_api(self):
+        """Test checking password changing history"""
         old_pass = self.creds.password
         new_pass1 = data_utils.rand_password()
         new_pass2 = data_utils.rand_password()
@@ -141,6 +144,7 @@
                           'Security compliance not available.')
     @decorators.idempotent_id('a7ad8bbf-2cff-4520-8c1d-96332e151658')
     def test_user_account_lockout(self):
+        """Test locking out user account after failure attempts"""
         if (CONF.identity.user_lockout_failure_attempts <= 0 or
                 CONF.identity.user_lockout_duration <= 0):
             raise self.skipException(