diff --git a/taf/api/roles.py b/taf/api/roles.py
index b77e98636..fec9b1e3d 100644
--- a/taf/api/roles.py
+++ b/taf/api/roles.py
@@ -551,7 +551,9 @@ def _initialize_roles_and_keystore(roles_key_infos, keystore, enter_info=True):
         if roles_key_infos is not None and type(roles_key_infos) == str:
             roles_key_infos_path = Path(roles_key_infos)
             if roles_key_infos_path.is_file() and "keystore" in roles_key_infos_dict:
-                keystore_path = Path(roles_key_infos_dict["keystore"]).expanduser().resolve()
+                keystore_path = (
+                    Path(roles_key_infos_dict["keystore"]).expanduser().resolve()
+                )
                 if not keystore_path.is_absolute():
                     keystore_path = (
                         roles_key_infos_path.parent / keystore_path
@@ -595,7 +597,7 @@ def _create_delegations(
     for role_name, role_info in roles_infos.items():
         if "delegations" in role_info:
             delegations = role_info["delegations"]
-            if not "roles" in delegations:
+            if "roles" not in delegations:
                 continue
             parent_role_obj = _role_obj(role_name, repository)
             delegations_info = role_info["delegations"]["roles"]
diff --git a/taf/keys.py b/taf/keys.py
index e39614a02..6b78b732e 100644
--- a/taf/keys.py
+++ b/taf/keys.py
@@ -99,7 +99,7 @@ def _sort_roles(key_info, repository):
                 yubikey_roles.append((role_name, role_key_info))
             if "delegations" in role_key_info:
                 delegations = role_key_info["delegations"]
-                if not "roles" in delegations:
+                if "roles" not in delegations:
                     continue
                 delegated_keystore_role, delegated_yubikey_roles = _sort_roles(
                     role_key_info["delegations"]["roles"], repository