style: apply ruff and django-upgrade

tests/conftest.py

@@ -53,11 +53,3 @@ def db_domain(db, tmp_path):
     )
     DomainTxtRecord.objects.create(domain=domain, name="@", target='"v=spf1 mx ~all"')
     return domain
-
-
-def load_command_class():
-    path = pathlib.Path(__file__).parent.parent / "mdb/management/commands/zone-sync.py"
-    spec = importlib.util.spec_from_file_location("zone_sync_command", path)
-    mod = importlib.util.module_from_spec(spec)
-    spec.loader.exec_module(mod)
-    return mod.Command

tests/test_api.py

@@ -35,11 +35,9 @@ def test_validate_puppet_host_by_secret(api_client, user_with_token, host):
     _, token = user_with_token
     data = {
         "pxe_key": host.pxe_key,
-        "certname": "{}.{}".format(
-            host.hostname, host.interface_set.first().domain.domain_name
-        ),
+        "certname": f"{host.hostname}.{host.interface_set.first().domain.domain_name}",
     }
-    api_client.credentials(HTTP_AUTHORIZATION="Token {}".format(token.key))
+    api_client.credentials(HTTP_AUTHORIZATION=f"Token {token.key}")
     res = api_client.post(reverse("api-validate-host-secret"), data, format="json")
     assert res.status_code == 200, res.content
     assert not Host.objects.get(pk=host.pk).pxe_installable

tests/test_zone_sync_command.py

@@ -3,6 +3,7 @@ from io import StringIO
 from unittest.mock import MagicMock, patch
 
 import pytest
+
 from mdb.management.commands.zone_sync import Command as CommandClass
 from mdb.services.zone_sync import ZoneSyncService