diff --git a/tempest/api/image/v2/admin/test_images.py b/tempest/api/image/v2/admin/test_images.py
index dbb8c58..7e13d7f 100644
--- a/tempest/api/image/v2/admin/test_images.py
+++ b/tempest/api/image/v2/admin/test_images.py
@@ -19,10 +19,12 @@
 
 
 class BasicOperationsImagesAdminTest(base.BaseV2ImageAdminTest):
+    """"Test image operations about image owner"""
 
     @decorators.related_bug('1420008')
     @decorators.idempotent_id('646a6eaa-135f-4493-a0af-12583021224e')
     def test_create_image_owner_param(self):
+        """Test creating image with specified owner"""
         # NOTE: Create image with owner different from tenant owner by
         # using "owner" parameter requires an admin privileges.
         random_id = data_utils.rand_uuid_hex()
@@ -35,6 +37,7 @@
     @decorators.related_bug('1420008')
     @decorators.idempotent_id('525ba546-10ef-4aad-bba1-1858095ce553')
     def test_update_image_owner_param(self):
+        """Test updating image owner"""
         random_id_1 = data_utils.rand_uuid_hex()
         image = self.admin_client.create_image(
             container_format='bare', disk_format='raw', owner=random_id_1)
diff --git a/tempest/api/image/v2/test_images.py b/tempest/api/image/v2/test_images.py
index 5a27a43..c4a3e0e 100644
--- a/tempest/api/image/v2/test_images.py
+++ b/tempest/api/image/v2/test_images.py
@@ -88,8 +88,7 @@
     @decorators.attr(type='smoke')
     @decorators.idempotent_id('f848bb94-1c6e-45a4-8726-39e3a5b23535')
     def test_delete_image(self):
-        # Deletes an image by image_id
-
+        """Test deleting an image by image_id"""
         # Create image
         image_name = data_utils.rand_name('image')
         container_format = CONF.image.container_formats[0]
@@ -110,8 +109,7 @@
     @decorators.attr(type='smoke')
     @decorators.idempotent_id('f66891a7-a35c-41a8-b590-a065c2a1caa6')
     def test_update_image(self):
-        # Updates an image by image_id
-
+        """Test updating an image by image_id"""
         # Create image
         image_name = data_utils.rand_name('image')
         container_format = CONF.image.container_formats[0]
@@ -135,6 +133,7 @@
 
     @decorators.idempotent_id('951ebe01-969f-4ea9-9898-8a3f1f442ab0')
     def test_deactivate_reactivate_image(self):
+        """Test deactivating and reactivating an image"""
         # Create image
         image_name = data_utils.rand_name('image')
         image = self.create_image(name=image_name,
@@ -235,7 +234,7 @@
 
     @decorators.idempotent_id('1e341d7a-90a9-494c-b143-2cdf2aeb6aee')
     def test_list_no_params(self):
-        # Simple test to see all fixture images returned
+        """Simple test to see all fixture images returned"""
         images_list = self.client.list_images()['images']
         image_list = [image['id'] for image in images_list]
 
@@ -244,25 +243,25 @@
 
     @decorators.idempotent_id('9959ca1d-1aa7-4b7a-a1ea-0fff0499b37e')
     def test_list_images_param_container_format(self):
-        # Test to get all images with a specific container_format
+        """Test to get all images with a specific container_format"""
         params = {"container_format": self.test_data['container_format']}
         self._list_by_param_value_and_assert(params)
 
     @decorators.idempotent_id('4a4735a7-f22f-49b6-b0d9-66e1ef7453eb')
     def test_list_images_param_disk_format(self):
-        # Test to get all images with disk_format = raw
+        """Test to get all images with disk_format = raw"""
         params = {"disk_format": "raw"}
         self._list_by_param_value_and_assert(params)
 
     @decorators.idempotent_id('7a95bb92-d99e-4b12-9718-7bc6ab73e6d2')
     def test_list_images_param_visibility(self):
-        # Test to get all images with visibility = private
+        """Test to get all images with visibility = private"""
         params = {"visibility": "private"}
         self._list_by_param_value_and_assert(params)
 
     @decorators.idempotent_id('cf1b9a48-8340-480e-af7b-fe7e17690876')
     def test_list_images_param_size(self):
-        # Test to get all images by size
+        """Test to get all images by size"""
         image_id = self.created_images[0]
         # Get image metadata
         image = self.client.show_image(image_id)
@@ -272,7 +271,7 @@
 
     @decorators.idempotent_id('4ad8c157-971a-4ba8-aa84-ed61154b1e7f')
     def test_list_images_param_min_max_size(self):
-        # Test to get all images with size between 2000 to 3000
+        """Test to get all images with min size and max size"""
         image_id = self.created_images[0]
         # Get image metadata
         image = self.client.show_image(image_id)
@@ -290,13 +289,13 @@
 
     @decorators.idempotent_id('7fc9e369-0f58-4d05-9aa5-0969e2d59d15')
     def test_list_images_param_status(self):
-        # Test to get all active images
+        """Test to get all active images"""
         params = {"status": "active"}
         self._list_by_param_value_and_assert(params)
 
     @decorators.idempotent_id('e914a891-3cc8-4b40-ad32-e0a39ffbddbb')
     def test_list_images_param_limit(self):
-        # Test to get images by limit
+        """Test to get images by limit"""
         params = {"limit": 1}
         images_list = self.client.list_images(params=params)['images']
 
@@ -305,7 +304,7 @@
 
     @decorators.idempotent_id('e9a44b91-31c8-4b40-a332-e0a39ffb4dbb')
     def test_list_image_param_owner(self):
-        # Test to get images by owner
+        """Test to get images by owner"""
         image_id = self.created_images[0]
         # Get image metadata
         image = self.client.show_image(image_id)
@@ -315,13 +314,13 @@
 
     @decorators.idempotent_id('55c8f5f5-bfed-409d-a6d5-4caeda985d7b')
     def test_list_images_param_name(self):
-        # Test to get images by name
+        """Test to get images by name"""
         params = {'name': self.test_data['name']}
         self._list_by_param_value_and_assert(params)
 
     @decorators.idempotent_id('aa8ac4df-cff9-418b-8d0f-dd9c67b072c9')
     def test_list_images_param_tag(self):
-        # Test to get images matching a tag
+        """Test to get images matching a tag"""
         params = {'tag': self.test_data['tags'][0]}
         images_list = self.client.list_images(params=params)['images']
         # Validating properties of fetched images
@@ -336,24 +335,26 @@
 
     @decorators.idempotent_id('eeadce49-04e0-43b7-aec7-52535d903e7a')
     def test_list_images_param_sort(self):
+        """Test listing images sorting in descending order"""
         params = {'sort': 'size:desc'}
         self._list_sorted_by_image_size_and_assert(params, desc=True)
 
     @decorators.idempotent_id('9faaa0c2-c3a5-43e1-8f61-61c54b409a49')
     def test_list_images_param_sort_key_dir(self):
+        """Test listing images sorting by size in descending order"""
         params = {'sort_key': 'size', 'sort_dir': 'desc'}
         self._list_sorted_by_image_size_and_assert(params, desc=True)
 
     @decorators.idempotent_id('622b925c-479f-4736-860d-adeaf13bc371')
     def test_get_image_schema(self):
-        # Test to get image schema
+        """Test to get image schema"""
         schema = "image"
         body = self.schemas_client.show_schema(schema)
         self.assertEqual("image", body['name'])
 
     @decorators.idempotent_id('25c8d7b2-df21-460f-87ac-93130bcdc684')
     def test_get_images_schema(self):
-        # Test to get images schema
+        """Test to get images schema"""
         schema = "images"
         body = self.schemas_client.show_schema(schema)
         self.assertEqual("images", body['name'])
@@ -372,6 +373,7 @@
 
     @decorators.idempotent_id('3fa50be4-8e38-4c02-a8db-7811bb780122')
     def test_list_images_param_member_status(self):
+        """Test listing images by member_status and visibility"""
         # Create an image to be shared using default visibility
         image_file = six.BytesIO(data_utils.random_bytes(2048))
         container_format = CONF.image.container_formats[0]
diff --git a/tempest/api/image/v2/test_images_member.py b/tempest/api/image/v2/test_images_member.py
index e19d8c8..bc67859 100644
--- a/tempest/api/image/v2/test_images_member.py
+++ b/tempest/api/image/v2/test_images_member.py
@@ -15,9 +15,11 @@
 
 
 class ImagesMemberTest(base.BaseV2MemberImageTest):
+    """Test image members"""
 
     @decorators.idempotent_id('5934c6ea-27dc-4d6e-9421-eeb5e045494a')
     def test_image_share_accept(self):
+        """Test sharing and accepting an image"""
         image_id = self._create_image()
         member = self.image_member_client.create_image_member(
             image_id, member=self.alt_tenant_id)
@@ -41,6 +43,7 @@
 
     @decorators.idempotent_id('d9e83e5f-3524-4b38-a900-22abcb26e90e')
     def test_image_share_reject(self):
+        """Test sharing and rejecting an image"""
         image_id = self._create_image()
         member = self.image_member_client.create_image_member(
             image_id, member=self.alt_tenant_id)
@@ -57,6 +60,7 @@
 
     @decorators.idempotent_id('a6ee18b9-4378-465e-9ad9-9a6de58a3287')
     def test_get_image_member(self):
+        """Test getting image members after the image is accepted"""
         image_id = self._create_image()
         self.image_member_client.create_image_member(
             image_id, member=self.alt_tenant_id)
@@ -75,6 +79,7 @@
 
     @decorators.idempotent_id('72989bc7-2268-48ed-af22-8821e835c914')
     def test_remove_image_member(self):
+        """Test removing image members after the image is accepted"""
         image_id = self._create_image()
         self.image_member_client.create_image_member(
             image_id, member=self.alt_tenant_id)
@@ -89,10 +94,12 @@
 
     @decorators.idempotent_id('634dcc3f-f6e2-4409-b8fd-354a0bb25d83')
     def test_get_image_member_schema(self):
+        """Test getting image member schema"""
         body = self.schemas_client.show_schema("member")
         self.assertEqual("member", body['name'])
 
     @decorators.idempotent_id('6ae916ef-1052-4e11-8d36-b3ae14853cbb')
     def test_get_image_members_schema(self):
+        """Test getting image members schema"""
         body = self.schemas_client.show_schema("members")
         self.assertEqual("members", body['name'])
diff --git a/tempest/api/image/v2/test_images_member_negative.py b/tempest/api/image/v2/test_images_member_negative.py
index caa90f9..5f6f1ae 100644
--- a/tempest/api/image/v2/test_images_member_negative.py
+++ b/tempest/api/image/v2/test_images_member_negative.py
@@ -16,10 +16,12 @@
 
 
 class ImagesMemberNegativeTest(base.BaseV2MemberImageTest):
+    """Negative tests of image members"""
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('b79efb37-820d-4cf0-b54c-308b00cf842c')
     def test_image_share_invalid_status(self):
+        """Test updating image member status to invalid status should fail"""
         image_id = self._create_image()
         member = self.image_member_client.create_image_member(
             image_id, member=self.alt_tenant_id)
@@ -32,6 +34,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('27002f74-109e-4a37-acd0-f91cd4597967')
     def test_image_share_owner_cannot_accept(self):
+        """Test that image owner can't accept image shared to other member"""
         image_id = self._create_image()
         member = self.image_member_client.create_image_member(
             image_id, member=self.alt_tenant_id)
diff --git a/tempest/api/image/v2/test_images_metadefs_resource_types.py b/tempest/api/image/v2/test_images_metadefs_resource_types.py
index c60b3f7..6867f2d 100644
--- a/tempest/api/image/v2/test_images_metadefs_resource_types.py
+++ b/tempest/api/image/v2/test_images_metadefs_resource_types.py
@@ -22,6 +22,7 @@
 
     @decorators.idempotent_id('6f358a4e-5ef0-11e6-a795-080027d0d606')
     def test_basic_meta_def_resource_type_association(self):
+        """Test image resource type associations"""
         # Get the available resource types and use one resource_type
         body = self.resource_types_client.list_resource_types()
         resource_name = body['resource_types'][0]['name']
diff --git a/tempest/api/image/v2/test_images_negative.py b/tempest/api/image/v2/test_images_negative.py
index b4baf05..dc2bb96 100644
--- a/tempest/api/image/v2/test_images_negative.py
+++ b/tempest/api/image/v2/test_images_negative.py
@@ -36,7 +36,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('668743d5-08ad-4480-b2b8-15da34f81d9f')
     def test_get_non_existent_image(self):
-        # get the non-existent image
+        """Get the non-existent image"""
         non_existent_id = data_utils.rand_uuid()
         self.assertRaises(lib_exc.NotFound, self.client.show_image,
                           non_existent_id)
@@ -44,14 +44,14 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('ef45000d-0a72-4781-866d-4cb7bf2562ad')
     def test_get_image_null_id(self):
-        # get image with image_id = NULL
+        """Get image with image_id = NULL"""
         image_id = ""
         self.assertRaises(lib_exc.NotFound, self.client.show_image, image_id)
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('e57fc127-7ba0-4693-92d7-1d8a05ebcba9')
     def test_get_delete_deleted_image(self):
-        # get and delete the deleted image
+        """Get and delete the deleted image"""
         # create and delete image
         image = self.client.create_image(name='test',
                                          container_format='bare',
@@ -70,7 +70,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('6fe40f1c-57bd-4918-89cc-8500f850f3de')
     def test_delete_non_existing_image(self):
-        # delete non-existent image
+        """Delete non-existent image"""
         non_existent_image_id = data_utils.rand_uuid()
         self.assertRaises(lib_exc.NotFound, self.client.delete_image,
                           non_existent_image_id)
@@ -78,7 +78,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('32248db1-ab88-4821-9604-c7c369f1f88c')
     def test_delete_image_null_id(self):
-        # delete image with image_id=NULL
+        """Delete image with image_id=NULL"""
         image_id = ""
         self.assertRaises(lib_exc.NotFound, self.client.delete_image,
                           image_id)
@@ -86,7 +86,10 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('292bd310-369b-41c7-a7a3-10276ef76753')
     def test_register_with_invalid_container_format(self):
-        # Negative tests for invalid data supplied to POST /images
+        """Create image with invalid container format
+
+        Negative tests for invalid data supplied to POST /images
+        """
         self.assertRaises(lib_exc.BadRequest, self.client.create_image,
                           name='test', container_format='wrong',
                           disk_format='vhd')
@@ -94,6 +97,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('70c6040c-5a97-4111-9e13-e73665264ce1')
     def test_register_with_invalid_disk_format(self):
+        """Create image with invalid disk format"""
         self.assertRaises(lib_exc.BadRequest, self.client.create_image,
                           name='test', container_format='bare',
                           disk_format='wrong')
@@ -101,7 +105,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('ab980a34-8410-40eb-872b-f264752f46e5')
     def test_delete_protected_image(self):
-        # Create a protected image
+        """Create a protected image"""
         image = self.create_image(protected=True)
         self.addCleanup(self.client.update_image, image['id'],
                         [dict(replace="/protected", value=False)])
diff --git a/tempest/api/image/v2/test_images_tags.py b/tempest/api/image/v2/test_images_tags.py
index 601826e..163063c 100644
--- a/tempest/api/image/v2/test_images_tags.py
+++ b/tempest/api/image/v2/test_images_tags.py
@@ -18,9 +18,11 @@
 
 
 class ImagesTagsTest(base.BaseV2ImageTest):
+    """Test image tags"""
 
     @decorators.idempotent_id('10407036-6059-4f95-a2cd-cbbbee7ed329')
     def test_update_delete_tags_for_image(self):
+        """Test adding and deleting image tags"""
         image = self.create_image(container_format='bare',
                                   disk_format='raw',
                                   visibility='private')
diff --git a/tempest/api/image/v2/test_images_tags_negative.py b/tempest/api/image/v2/test_images_tags_negative.py
index 440fa36..2db4a74 100644
--- a/tempest/api/image/v2/test_images_tags_negative.py
+++ b/tempest/api/image/v2/test_images_tags_negative.py
@@ -19,11 +19,12 @@
 
 
 class ImagesTagsNegativeTest(base.BaseV2ImageTest):
+    """Negative tests of image tags"""
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('8cd30f82-6f9a-4c6e-8034-c1b51fba43d9')
     def test_update_tags_for_non_existing_image(self):
-        # Update tag with non existing image.
+        """Update image tag with non existing image"""
         tag = data_utils.rand_name('tag')
         non_exist_image = data_utils.rand_uuid()
         self.assertRaises(lib_exc.NotFound, self.client.add_image_tag,
@@ -32,7 +33,7 @@
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('39c023a2-325a-433a-9eea-649bf1414b19')
     def test_delete_non_existing_tag(self):
-        # Delete non existing tag.
+        """Delete non existing image tag"""
         image = self.create_image(container_format='bare',
                                   disk_format='raw',
                                   visibility='private'
diff --git a/tempest/api/image/v2/test_versions.py b/tempest/api/image/v2/test_versions.py
index 84f1068..ef91354 100644
--- a/tempest/api/image/v2/test_versions.py
+++ b/tempest/api/image/v2/test_versions.py
@@ -17,10 +17,12 @@
 
 
 class VersionsTest(base.BaseV2ImageTest):
+    """Test image versions"""
 
     @decorators.idempotent_id('659ea30a-a17c-4317-832c-0f68ed23c31d')
     @decorators.attr(type='smoke')
     def test_list_versions(self):
+        """Test listing image versions"""
         versions = self.versions_client.list_versions()['versions']
         expected_resources = ('id', 'links', 'status')