diff --git a/tempest/api/compute/servers/test_list_servers_negative.py b/tempest/api/compute/servers/test_list_servers_negative.py
index b95db5c..3d55696 100644
--- a/tempest/api/compute/servers/test_list_servers_negative.py
+++ b/tempest/api/compute/servers/test_list_servers_negative.py
@@ -20,6 +20,8 @@
 
 
 class ListServersNegativeTestJSON(base.BaseV2ComputeTest):
+    """Negative tests of listing servers"""
+
     create_default_network = True
 
     @classmethod
@@ -45,7 +47,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('24a26f1a-1ddc-4eea-b0d7-a90cc874ad8f')
     def test_list_servers_with_a_deleted_server(self):
-        # Verify deleted servers do not show by default in list servers
+        """Test that deleted servers do not show by default in list servers"""
         # List servers and verify server not returned
         body = self.client.list_servers()
         servers = body['servers']
@@ -56,7 +58,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('ff01387d-c7ad-47b4-ae9e-64fa214638fe')
     def test_list_servers_by_non_existing_image(self):
-        # Listing servers for a non existing image returns empty list
+        """Test listing servers for a non existing image returns empty list"""
         body = self.client.list_servers(image='non_existing_image')
         servers = body['servers']
         self.assertEmpty(servers)
@@ -64,7 +66,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('5913660b-223b-44d4-a651-a0fbfd44ca75')
     def test_list_servers_by_non_existing_flavor(self):
-        # Listing servers by non existing flavor returns empty list
+        """Test listing servers by non existing flavor returns empty list"""
         body = self.client.list_servers(flavor='non_existing_flavor')
         servers = body['servers']
         self.assertEmpty(servers)
@@ -72,7 +74,12 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('e2c77c4a-000a-4af3-a0bd-629a328bde7c')
     def test_list_servers_by_non_existing_server_name(self):
-        # Listing servers for a non existent server name returns empty list
+        """Test listing servers for a non existent server name
+
+        Listing servers for a non existent server name should return empty
+        list.
+        """
+
         body = self.client.list_servers(name='non_existing_server_name')
         servers = body['servers']
         self.assertEmpty(servers)
@@ -80,9 +87,13 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('fcdf192d-0f74-4d89-911f-1ec002b822c4')
     def test_list_servers_status_non_existing(self):
-        # When invalid status is specified, up to microversion 2.37,
-        # an empty list is returned, and starting from microversion 2.38,
-        # a 400 error is returned in that case.
+        """Test listing servers with non existing status
+
+        When invalid status is specified, up to microversion 2.37,
+        an empty list is returned, and starting from microversion 2.38,
+        a 400 error is returned in that case.
+        """
+
         if self.is_requested_microversion_compatible('2.37'):
             body = self.client.list_servers(status='non_existing_status')
             servers = body['servers']
@@ -94,6 +105,12 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('d47c17fb-eebd-4287-8e95-f20a7e627b18')
     def test_list_servers_by_limits_greater_than_actual_count(self):
+        """Test listing servers by limit greater than actual count
+
+        Listing servers by limit greater than actual count should return
+        all servers.
+        """
+
         # Gather the complete list of servers in the project for reference
         full_list = self.client.list_servers()['servers']
         # List servers by specifying a greater value for limit
@@ -104,21 +121,21 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('679bc053-5e70-4514-9800-3dfab1a380a6')
     def test_list_servers_by_limits_pass_string(self):
-        # Return an error if a string value is passed for limit
+        """Test listing servers by non-integer limit should fail"""
         self.assertRaises(lib_exc.BadRequest, self.client.list_servers,
                           limit='testing')
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('62610dd9-4713-4ee0-8beb-fd2c1aa7f950')
     def test_list_servers_by_limits_pass_negative_value(self):
-        # Return an error if a negative value for limit is passed
+        """Test listing servers by negative limit should fail"""
         self.assertRaises(lib_exc.BadRequest, self.client.list_servers,
                           limit=-1)
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('87d12517-e20a-4c9c-97b6-dd1628d6d6c9')
     def test_list_servers_by_changes_since_invalid_date(self):
-        # Return an error when invalid date format is passed
+        """Test listing servers by invalid changes-since format should fail"""
         params = {'changes-since': '2011/01/01'}
         self.assertRaises(lib_exc.BadRequest, self.client.list_servers,
                           **params)
@@ -126,7 +143,12 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('74745ad8-b346-45b5-b9b8-509d7447fc1f')
     def test_list_servers_by_changes_since_future_date(self):
-        # Return an empty list when a date in the future is passed.
+        """Test listing servers by a future changes-since date
+
+        Return an empty list when a date in the future is passed as
+        changes-since value.
+        """
+
         # updated_at field may haven't been set at the point in the boot
         # process where build_request still exists, so add
         # {'status': 'ACTIVE'} along with changes-since as filter.
@@ -138,7 +160,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('93055106-2d34-46fe-af68-d9ddbf7ee570')
     def test_list_servers_detail_server_is_deleted(self):
-        # Server details are not listed for a deleted server
+        """Test listing servers detail should not contain deleted server"""
         body = self.client.list_servers(detail=True)
         servers = body['servers']
         actual = [srv for srv in servers
diff --git a/tempest/api/compute/servers/test_multiple_create.py b/tempest/api/compute/servers/test_multiple_create.py
index dcadace..10c76bb 100644
--- a/tempest/api/compute/servers/test_multiple_create.py
+++ b/tempest/api/compute/servers/test_multiple_create.py
@@ -19,11 +19,15 @@
 
 
 class MultipleCreateTestJSON(base.BaseV2ComputeTest):
+    """Test creating multiple servers in one request"""
     create_default_network = True
 
     @decorators.idempotent_id('61e03386-89c3-449c-9bb1-a06f423fd9d1')
     def test_multiple_create(self):
-        # Creating server with min_count=2, 2 servers will be created.
+        """Test creating multiple servers in one request
+
+        Creating server with min_count=2, 2 servers will be created.
+        """
         tenant_network = self.get_tenant_network()
         body, servers = compute.create_test_server(
             self.os_primary,
@@ -40,8 +44,12 @@
 
     @decorators.idempotent_id('864777fb-2f1e-44e3-b5b9-3eb6fa84f2f7')
     def test_multiple_create_with_reservation_return(self):
-        # Creating multiple servers with return_reservation_id=True,
-        # reservation_id will be returned.
+        """Test creating multiple servers with return_reservation_id=True
+
+        Creating multiple servers with return_reservation_id=True,
+        reservation_id will be returned.
+        """
+
         body = self.create_test_server(wait_until='ACTIVE',
                                        min_count=1,
                                        max_count=2,
diff --git a/tempest/api/compute/servers/test_multiple_create_negative.py b/tempest/api/compute/servers/test_multiple_create_negative.py
index 6bdf83b..3a970dd 100644
--- a/tempest/api/compute/servers/test_multiple_create_negative.py
+++ b/tempest/api/compute/servers/test_multiple_create_negative.py
@@ -19,11 +19,12 @@
 
 
 class MultipleCreateNegativeTestJSON(base.BaseV2ComputeTest):
+    """Negative tests of creating multiple servers in one request"""
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('daf29d8d-e928-4a01-9a8c-b129603f3fc0')
     def test_min_count_less_than_one(self):
-        # Creating server with min_count=0 should fail.
+        """Test creating server with min_count=0 should fail"""
         invalid_min_count = 0
         self.assertRaises(lib_exc.BadRequest, self.create_test_server,
                           min_count=invalid_min_count)
@@ -31,7 +32,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('999aa722-d624-4423-b813-0d1ac9884d7a')
     def test_min_count_non_integer(self):
-        # Creating server with non-integer min_count should fail.
+        """Test creating server with non-integer min_count should fail"""
         invalid_min_count = 2.5
         self.assertRaises(lib_exc.BadRequest, self.create_test_server,
                           min_count=invalid_min_count)
@@ -39,7 +40,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('a6f9c2ab-e060-4b82-b23c-4532cb9390ff')
     def test_max_count_less_than_one(self):
-        # Creating server with max_count < 1 shoudld fail.
+        """Test creating server with max_count < 1 shoudld fail"""
         invalid_max_count = 0
         self.assertRaises(lib_exc.BadRequest, self.create_test_server,
                           max_count=invalid_max_count)
@@ -47,7 +48,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('9c5698d1-d7af-4c80-b971-9d403135eea2')
     def test_max_count_non_integer(self):
-        # Creating server with non-integer max_count should fail.
+        """Test creating server with non-integer max_count should fail"""
         invalid_max_count = 2.5
         self.assertRaises(lib_exc.BadRequest, self.create_test_server,
                           max_count=invalid_max_count)
@@ -55,7 +56,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('476da616-f1ef-4271-a9b1-b9fc87727cdf')
     def test_max_count_less_than_min_count(self):
-        # Creating server with max_count less than min_count should fail.
+        """Test creating server with max_count < min_count should fail"""
         min_count = 3
         max_count = 2
         self.assertRaises(lib_exc.BadRequest, self.create_test_server,
diff --git a/tempest/api/compute/servers/test_server_metadata.py b/tempest/api/compute/servers/test_server_metadata.py
index 9d87e1c..fc859a8 100644
--- a/tempest/api/compute/servers/test_server_metadata.py
+++ b/tempest/api/compute/servers/test_server_metadata.py
@@ -18,6 +18,8 @@
 
 
 class ServerMetadataTestJSON(base.BaseV2ComputeTest):
+    """Test server metadata"""
+
     create_default_network = True
 
     @classmethod
@@ -37,7 +39,10 @@
 
     @decorators.idempotent_id('479da087-92b3-4dcf-aeb3-fd293b2d14ce')
     def test_list_server_metadata(self):
-        # All metadata key/value pairs for a server should be returned
+        """Test listing server metadata
+
+        All metadata key/value pairs for a server should be returned.
+        """
         resp_metadata = (self.client.list_server_metadata(self.server['id'])
                          ['metadata'])
 
@@ -47,7 +52,10 @@
 
     @decorators.idempotent_id('211021f6-21de-4657-a68f-908878cfe251')
     def test_set_server_metadata(self):
-        # The server's metadata should be replaced with the provided values
+        """Test setting server metadata
+
+        The server's metadata should be replaced with the provided values
+        """
         # Create a new set of metadata for the server
         req_metadata = {'meta2': 'data2', 'meta3': 'data3'}
         self.client.set_server_metadata(self.server['id'], req_metadata)
@@ -60,8 +68,10 @@
 
     @decorators.idempotent_id('344d981e-0c33-4997-8a5d-6c1d803e4134')
     def test_update_server_metadata(self):
-        # The server's metadata values should be updated to the
-        # provided values
+        """Test updating server metadata
+
+        The server's metadata values should be updated to the provided values.
+        """
         meta = {'key1': 'alt1', 'key3': 'value3'}
         self.client.update_server_metadata(self.server['id'], meta)
 
@@ -73,8 +83,11 @@
 
     @decorators.idempotent_id('0f58d402-e34a-481d-8af8-b392b17426d9')
     def test_update_metadata_empty_body(self):
-        # The original metadata should not be lost if empty metadata body is
-        # passed
+        """Test updating server metadata to empty values
+
+        The original server metadata should not be lost if empty metadata
+        body is passed.
+        """
         meta = {}
         self.client.update_server_metadata(self.server['id'], meta)
         resp_metadata = (self.client.list_server_metadata(self.server['id'])
@@ -84,15 +97,19 @@
 
     @decorators.idempotent_id('3043c57d-7e0e-49a6-9a96-ad569c265e6a')
     def test_get_server_metadata_item(self):
-        # The value for a specific metadata key should be returned
+        """Test getting specific server metadata item"""
         meta = self.client.show_server_metadata_item(self.server['id'],
                                                      'key2')['meta']
         self.assertEqual('value2', meta['key2'])
 
     @decorators.idempotent_id('58c02d4f-5c67-40be-8744-d3fa5982eb1c')
     def test_set_server_metadata_item(self):
-        # The item's value should be updated to the provided value
-        # Update the metadata value
+        """Test updating specific server metadata item
+
+        The metadata item's value should be updated to the provided value.
+        """
+
+        # Update the metadata value.
         meta = {'nova': 'alt'}
         self.client.set_server_metadata_item(self.server['id'], 'nova', meta)
 
@@ -104,7 +121,10 @@
 
     @decorators.idempotent_id('127642d6-4c7b-4486-b7cd-07265a378658')
     def test_delete_server_metadata_item(self):
-        # The metadata value/key pair should be deleted from the server
+        """Test deleting server metadata item
+
+        The metadata value/key pair should be deleted from the server.
+        """
         self.client.delete_server_metadata_item(self.server['id'], 'key1')
 
         # Verify the metadata item has been removed
diff --git a/tempest/api/compute/servers/test_server_metadata_negative.py b/tempest/api/compute/servers/test_server_metadata_negative.py
index 5688af1..6435ccc 100644
--- a/tempest/api/compute/servers/test_server_metadata_negative.py
+++ b/tempest/api/compute/servers/test_server_metadata_negative.py
@@ -20,6 +20,8 @@
 
 
 class ServerMetadataNegativeTestJSON(base.BaseV2ComputeTest):
+    """Negative tests of server metadata"""
+
     create_default_network = True
 
     @classmethod
@@ -36,6 +38,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('fe114a8f-3a57-4eff-9ee2-4e14628df049')
     def test_server_create_metadata_key_too_long(self):
+        """Test creating server with too long metadata key should fail"""
         # Attempt to start a server with a meta-data key that is > 255
         # characters
 
@@ -52,7 +55,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('92431555-4d8b-467c-b95b-b17daa5e57ff')
     def test_create_server_metadata_blank_key(self):
-        # Blank key should trigger an error.
+        """Test creating server with blank metadata key should fail"""
         meta = {'': 'data1'}
         self.assertRaises(lib_exc.BadRequest,
                           self.create_test_server,
@@ -61,6 +64,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('4d9cd7a3-2010-4b41-b8fe-3bbf0b169466')
     def test_server_metadata_non_existent_server(self):
+        """Test getting metadata item for a non existent server should fail"""
         # GET on a non-existent server should not succeed
         non_existent_server_id = data_utils.rand_uuid()
         self.assertRaises(lib_exc.NotFound,
@@ -71,7 +75,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('f408e78e-3066-4097-9299-3b0182da812e')
     def test_list_server_metadata_non_existent_server(self):
-        # List metadata on a non-existent server should not succeed
+        """Test listing metadata for a non existent server should fail"""
         non_existent_server_id = data_utils.rand_uuid()
         self.assertRaises(lib_exc.NotFound,
                           self.client.list_server_metadata,
@@ -80,8 +84,10 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('0025fbd6-a4ba-4cde-b8c2-96805dcfdabc')
     def test_wrong_key_passed_in_body(self):
-        # Raise BadRequest if key in uri does not match
-        # the key passed in body.
+        """Test setting server metadata item with wrong key in body
+
+        Raise BadRequest if key in uri does not match the key passed in body.
+        """
         meta = {'testkey': 'testvalue'}
         self.assertRaises(lib_exc.BadRequest,
                           self.client.set_server_metadata_item,
@@ -90,7 +96,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('0df38c2a-3d4e-4db5-98d8-d4d9fa843a12')
     def test_set_metadata_non_existent_server(self):
-        # Set metadata on a non-existent server should not succeed
+        """Test setting metadata for a non existent server should fail"""
         non_existent_server_id = data_utils.rand_uuid()
         meta = {'meta1': 'data1'}
         self.assertRaises(lib_exc.NotFound,
@@ -101,7 +107,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('904b13dc-0ef2-4e4c-91cd-3b4a0f2f49d8')
     def test_update_metadata_non_existent_server(self):
-        # An update should not happen for a non-existent server
+        """Test updating metadata for a non existent server should fail"""
         non_existent_server_id = data_utils.rand_uuid()
         meta = {'key1': 'value1', 'key2': 'value2'}
         self.assertRaises(lib_exc.NotFound,
@@ -112,7 +118,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('a452f38c-05c2-4b47-bd44-a4f0bf5a5e48')
     def test_update_metadata_with_blank_key(self):
-        # Blank key should trigger an error
+        """Test updating server metadata to blank key should fail"""
         meta = {'': 'data1'}
         self.assertRaises(lib_exc.BadRequest,
                           self.client.update_server_metadata,
@@ -121,7 +127,10 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('6bbd88e1-f8b3-424d-ba10-ae21c45ada8d')
     def test_delete_metadata_non_existent_server(self):
-        # Should not be able to delete metadata item from a non-existent server
+        """Test deleting metadata item from a non existent server
+
+        Should not be able to delete metadata item from a non-existent server.
+        """
         non_existent_server_id = data_utils.rand_uuid()
         self.assertRaises(lib_exc.NotFound,
                           self.client.delete_server_metadata_item,
@@ -131,9 +140,11 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('d8c0a210-a5c3-4664-be04-69d96746b547')
     def test_metadata_items_limit(self):
-        # A 403 Forbidden or 413 Overlimit (old behaviour) exception
-        # will be raised while exceeding metadata items limit for
-        # tenant.
+        """Test set/update server metadata over limit should fail
+
+        A 403 Forbidden or 413 Overlimit (old behaviour) exception
+        will be raised while exceeding metadata items limit for project.
+        """
         quota_set = self.quotas_client.show_quota_set(
             self.tenant_id)['quota_set']
         quota_metadata = quota_set['metadata_items']
@@ -157,8 +168,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('96100343-7fa9-40d8-80fa-d29ef588ce1c')
     def test_set_server_metadata_blank_key(self):
-        # Raise a bad request error for blank key.
-        # set_server_metadata will replace all metadata with new value
+        """Test setting server metadata with blank key should fail"""
         meta = {'': 'data1'}
         self.assertRaises(lib_exc.BadRequest,
                           self.client.set_server_metadata,
@@ -167,8 +177,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('64a91aee-9723-4863-be44-4c9d9f1e7d0e')
     def test_set_server_metadata_missing_metadata(self):
-        # Raise a bad request error for a missing metadata field
-        # set_server_metadata will replace all metadata with new value
+        """Test setting server metadata without metadata field should fail"""
         meta = {'meta1': 'data1'}
         self.assertRaises(lib_exc.BadRequest,
                           self.client.set_server_metadata,
diff --git a/tempest/api/compute/servers/test_server_password.py b/tempest/api/compute/servers/test_server_password.py
index 7b31ede..f61d4fd 100644
--- a/tempest/api/compute/servers/test_server_password.py
+++ b/tempest/api/compute/servers/test_server_password.py
@@ -19,6 +19,8 @@
 
 
 class ServerPasswordTestJSON(base.BaseV2ComputeTest):
+    """Test server password"""
+
     create_default_network = True
 
     @classmethod
@@ -28,8 +30,10 @@
 
     @decorators.idempotent_id('f83b582f-62a8-4f22-85b0-0dee50ff783a')
     def test_get_server_password(self):
+        """Test getting password of a server"""
         self.servers_client.show_password(self.server['id'])
 
     @decorators.idempotent_id('f8229e8b-b625-4493-800a-bde86ac611ea')
     def test_delete_server_password(self):
+        """Test deleting password from a server"""
         self.servers_client.delete_password(self.server['id'])
diff --git a/tempest/api/compute/servers/test_servers.py b/tempest/api/compute/servers/test_servers.py
index 3a4bd6d..cc013e3 100644
--- a/tempest/api/compute/servers/test_servers.py
+++ b/tempest/api/compute/servers/test_servers.py
@@ -25,6 +25,7 @@
 
 
 class ServersTestJSON(base.BaseV2ComputeTest):
+    """Test servers API"""
     create_default_network = True
 
     @classmethod
@@ -37,8 +38,11 @@
                           enable_instance_password,
                           'Instance password not available.')
     def test_create_server_with_admin_password(self):
-        # If an admin password is provided on server creation, the server's
-        # root password should be set to that password.
+        """Test creating server with admin password
+
+        If an admin password is provided on server creation, the server's
+        root password should be set to that password.
+        """
         server = self.create_test_server(adminPass='testpassword')
         self.addCleanup(self.delete_server, server['id'])
 
@@ -47,8 +51,7 @@
 
     @decorators.idempotent_id('8fea6be7-065e-47cf-89b8-496e6f96c699')
     def test_create_with_existing_server_name(self):
-        # Creating a server with a name that already exists is allowed
-
+        """Test creating a server with already existing name is allowed"""
         # TODO(sdague): clear out try, we do cleanup one layer up
         server_name = data_utils.rand_name(
             self.__class__.__name__ + '-server')
@@ -69,8 +72,7 @@
 
     @decorators.idempotent_id('f9e15296-d7f9-4e62-b53f-a04e89160833')
     def test_create_specify_keypair(self):
-        # Specify a keypair while creating a server
-
+        """Test creating server with keypair"""
         key_name = data_utils.rand_name('key')
         self.keypairs_client.create_keypair(name=key_name)
         self.addCleanup(self.keypairs_client.delete_keypair, key_name)
@@ -97,7 +99,7 @@
 
     @decorators.idempotent_id('5e6ccff8-349d-4852-a8b3-055df7988dd2')
     def test_update_server_name(self):
-        # The server name should be changed to the provided value
+        """Test updating server name to the provided value"""
         server = self.create_test_server(wait_until='ACTIVE')
         self.addCleanup(self.delete_server, server['id'])
         # Update instance name with non-ASCII characters
@@ -115,7 +117,7 @@
 
     @decorators.idempotent_id('89b90870-bc13-4b73-96af-f9d4f2b70077')
     def test_update_access_server_address(self):
-        # The server's access addresses should reflect the provided values
+        """Test updating server's access addresses to the provided value"""
         server = self.create_test_server(wait_until='ACTIVE')
         self.addCleanup(self.delete_server, server['id'])
 
@@ -132,7 +134,7 @@
 
     @decorators.idempotent_id('38fb1d02-c3c5-41de-91d3-9bc2025a75eb')
     def test_create_server_with_ipv6_addr_only(self):
-        # Create a server without an IPv4 address(only IPv6 address).
+        """Test creating server with ipv6 address only(no ipv4 address)"""
         server = self.create_test_server(accessIPv6='2001:2001::3',
                                          wait_until='ACTIVE')
         self.addCleanup(self.delete_server, server['id'])
@@ -142,17 +144,22 @@
     @decorators.related_bug('1730756')
     @decorators.idempotent_id('defbaca5-d611-49f5-ae21-56ee25d2db49')
     def test_create_server_specify_multibyte_character_name(self):
-        # prefix character is:
-        # http://unicode.org/cldr/utility/character.jsp?a=20A1
+        """Test creating server with multi character name
 
-        # We use a string with 3 byte utf-8 character due to nova
-        # will return 400(Bad Request) if we attempt to send a name which has
-        # 4 byte utf-8 character.
+        prefix character is:
+        http://unicode.org/cldr/utility/character.jsp?a=20A1
+
+        We use a string with 3 byte utf-8 character due to nova
+        will return 400(Bad Request) if we attempt to send a name which has
+        4 byte utf-8 character.
+        """
         utf8_name = data_utils.rand_name(b'\xe2\x82\xa1'.decode('utf-8'))
         self.create_test_server(name=utf8_name, wait_until='ACTIVE')
 
 
 class ServerShowV247Test(base.BaseV2ComputeTest):
+    """Test servers API with compute microversion greater than 2.46"""
+
     min_microversion = '2.47'
     max_microversion = 'latest'
 
@@ -164,12 +171,14 @@
 
     @decorators.idempotent_id('88b0bdb2-494c-11e7-a919-92ebcb67fe33')
     def test_show_server(self):
+        """Test getting server detail"""
         server = self.create_test_server()
         # All fields will be checked by API schema
         self.servers_client.show_server(server['id'])
 
     @decorators.idempotent_id('8de397c2-57d0-4b90-aa30-e5d668f21a8b')
     def test_update_rebuild_list_server(self):
+        """Test update/rebuild/list server"""
         server = self.create_test_server()
         # Checking update API response schema
         self.servers_client.update_server(server['id'])
@@ -184,6 +193,8 @@
 
 
 class ServerShowV263Test(base.BaseV2ComputeTest):
+    """Test servers API with compute microversion greater than 2.62"""
+
     min_microversion = '2.63'
     max_microversion = 'latest'
 
@@ -195,6 +206,7 @@
                           'required to test image certificate validation.')
     @decorators.idempotent_id('71b8e3d5-11d2-494f-b917-b094a4afed3c')
     def test_show_update_rebuild_list_server(self):
+        """Test show/update/rebuild/list server"""
         trusted_certs = CONF.compute.certified_image_trusted_certs
         server = self.create_test_server(
             image_id=CONF.compute.certified_image_ref,
diff --git a/tempest/api/compute/servers/test_virtual_interfaces.py b/tempest/api/compute/servers/test_virtual_interfaces.py
index dfd6ca4..b2e02c5 100644
--- a/tempest/api/compute/servers/test_virtual_interfaces.py
+++ b/tempest/api/compute/servers/test_virtual_interfaces.py
@@ -28,6 +28,8 @@
 # TODO(mriedem): Remove this test class once the nova queens branch goes into
 # extended maintenance mode.
 class VirtualInterfacesTestJSON(base.BaseV2ComputeTest):
+    """Test virtual interfaces API with compute microversion less than 2.44"""
+
     max_microversion = '2.43'
 
     depends_on_nova_network = True
@@ -47,9 +49,7 @@
     @decorators.idempotent_id('96c4e2ef-5e4d-4d7f-87f5-fed6dca18016')
     @utils.services('network')
     def test_list_virtual_interfaces(self):
-        # Positive test:Should be able to GET the virtual interfaces list
-        # for a given server_id
-
+        """Test listing virtual interfaces of a server"""
         if CONF.service_available.neutron:
             with testtools.ExpectedException(exceptions.BadRequest):
                 self.client.list_virtual_interfaces(self.server['id'])
diff --git a/tempest/api/compute/servers/test_virtual_interfaces_negative.py b/tempest/api/compute/servers/test_virtual_interfaces_negative.py
index f6e8bc9..5667281 100644
--- a/tempest/api/compute/servers/test_virtual_interfaces_negative.py
+++ b/tempest/api/compute/servers/test_virtual_interfaces_negative.py
@@ -23,6 +23,12 @@
 # TODO(mriedem): Remove this test class once the nova queens branch goes into
 # extended maintenance mode.
 class VirtualInterfacesNegativeTestJSON(base.BaseV2ComputeTest):
+    """Negative tests of virtual interfaces API
+
+    Negative tests of virtual interfaces API for compute microversion less
+    than 2.44.
+    """
+
     max_microversion = '2.43'
 
     depends_on_nova_network = True
@@ -37,8 +43,7 @@
     @decorators.idempotent_id('64ebd03c-1089-4306-93fa-60f5eb5c803c')
     @utils.services('network')
     def test_list_virtual_interfaces_invalid_server_id(self):
-        # Negative test: Should not be able to GET virtual interfaces
-        # for an invalid server_id
+        """Test listing virtual interfaces of an invalid server should fail"""
         invalid_server_id = data_utils.rand_uuid()
         self.assertRaises(lib_exc.NotFound,
                           self.servers_client.list_virtual_interfaces,