diff --git a/examples/create_child_keys.py b/examples/create_child_keys.py
index eefa3710..5e5d23e7 100644
--- a/examples/create_child_keys.py
+++ b/examples/create_child_keys.py
@@ -1,6 +1,7 @@
-import httpx
-import sys
 import json
+import sys
+
+import httpx
 
 
 def create_child_keys(base_url, api_key, count=3):
@@ -42,3 +43,4 @@ if __name__ == "__main__":
         print(json.dumps(keys, indent=2))
     else:
         print("\nNo child keys were created.")
+
diff --git a/routstr/core/main.py b/routstr/core/main.py
index 3083097d..00a51ec3 100644
--- a/routstr/core/main.py
+++ b/routstr/core/main.py
@@ -15,8 +15,7 @@ from ..discovery import providers_cache_refresher, providers_router
 from ..nip91 import announce_provider
 from ..payment.models import models_router, update_sats_pricing
 from ..payment.price import update_prices_periodically
-from ..proxy import (initialize_upstreams, proxy_router,
-                     refresh_model_maps_periodically)
+from ..proxy import initialize_upstreams, proxy_router, refresh_model_maps_periodically
 from ..wallet import periodic_payout
 from .admin import admin_router
 from .db import create_session, init_db, run_migrations
diff --git a/tests/integration/test_child_keys.py b/tests/integration/test_child_keys.py
index 77da7675..4265430a 100644
--- a/tests/integration/test_child_keys.py
+++ b/tests/integration/test_child_keys.py
@@ -1,9 +1,11 @@
-import pytest
 import secrets
+
+import pytest
 from fastapi import HTTPException
-from routstr.core.db import ApiKey
+
+from routstr.auth import adjust_payment_for_tokens, pay_for_request
 from routstr.balance import create_child_key
-from routstr.auth import pay_for_request, adjust_payment_for_tokens
+from routstr.core.db import ApiKey
 from routstr.core.settings import settings