diff --git a/tempest/api/volume/admin/test_volume_types.py b/tempest/api/volume/admin/test_volume_types.py
index 6b2acc6..3d44bbe 100644
--- a/tempest/api/volume/admin/test_volume_types.py
+++ b/tempest/api/volume/admin/test_volume_types.py
@@ -42,7 +42,7 @@
         extra_specs = {"storage_protocol": proto,
                        "vendor_name": vendor}
         # Create two volume_types
-        for i in range(2):
+        for _ in range(2):
             vol_type = self.create_volume_type(
                 extra_specs=extra_specs)
             volume_types.append(vol_type)
diff --git a/tempest/api/volume/admin/v2/test_volumes_list.py b/tempest/api/volume/admin/v2/test_volumes_list.py
index cdd9df9..fd36d0a 100644
--- a/tempest/api/volume/admin/v2/test_volumes_list.py
+++ b/tempest/api/volume/admin/v2/test_volumes_list.py
@@ -32,7 +32,7 @@
         # NOTE(zhufl): When using pre-provisioned credentials, the project
         # may have volumes other than those created below.
         cls.volume_list = cls.volumes_client.list_volumes()['volumes']
-        for i in range(3):
+        for _ in range(3):
             volume = cls.create_volume()
             # Fetch volume details
             volume_details = cls.volumes_client.show_volume(
diff --git a/tempest/api/volume/test_volumes_list.py b/tempest/api/volume/test_volumes_list.py
index 030ea6c..5e3f49f 100644
--- a/tempest/api/volume/test_volumes_list.py
+++ b/tempest/api/volume/test_volumes_list.py
@@ -61,7 +61,7 @@
         # Create 3 test volumes
         cls.volume_list = []
         cls.metadata = {'Type': 'work'}
-        for i in range(3):
+        for _ in range(3):
             volume = cls.create_volume(metadata=cls.metadata)
             volume = cls.volumes_client.show_volume(volume['id'])['volume']
             cls.volume_list.append(volume)
diff --git a/tempest/api/volume/test_volumes_snapshots_list.py b/tempest/api/volume/test_volumes_snapshots_list.py
index 4416bef..b831252 100644
--- a/tempest/api/volume/test_volumes_snapshots_list.py
+++ b/tempest/api/volume/test_volumes_snapshots_list.py
@@ -105,12 +105,6 @@
         # List returns zero elements
         self._list_snapshots_by_param_limit(limit=0, expected_elements=0)
 
-    def cleanup_snapshot(self, snapshot):
-        # Delete the snapshot
-        self.snapshots_client.delete_snapshot(snapshot['id'])
-        self.snapshots_client.wait_for_resource_deletion(snapshot['id'])
-        self.snapshots.remove(snapshot)
-
 
 class VolumesV1SnapshotLimitTestJSON(VolumesV2SnapshotListTestJSON):
     _api_version = 1
diff --git a/tempest/api/volume/v2/test_volumes_list.py b/tempest/api/volume/v2/test_volumes_list.py
index fb8c65d..28ba941 100644
--- a/tempest/api/volume/v2/test_volumes_list.py
+++ b/tempest/api/volume/v2/test_volumes_list.py
@@ -42,7 +42,7 @@
         # may have volumes other than those created below.
         existing_volumes = cls.volumes_client.list_volumes()['volumes']
         cls.volume_id_list = [vol['id'] for vol in existing_volumes]
-        for i in range(3):
+        for _ in range(3):
             volume = cls.create_volume(metadata=cls.metadata)
             cls.volume_id_list.append(volume['id'])