diff --git a/packages/django-cf/django_cf/db/base_engine.py b/packages/django-cf/django_cf/db/base_engine.py
index 6af0f608..7ff587c5 100644
--- a/packages/django-cf/django_cf/db/base_engine.py
+++ b/packages/django-cf/django_cf/db/base_engine.py
@@ -161,7 +161,7 @@ def last_executed_query(self, cursor, sql, params):
 
     def bulk_insert_sql(self, fields, placeholder_rows):
         placeholder_rows_sql = (", ".join(row) for row in placeholder_rows)
-        values_sql = ", ".join("(%s)" % sql for sql in placeholder_rows_sql)
+        values_sql = ", ".join(f"({sql})" for sql in placeholder_rows_sql)
         return "VALUES " + values_sql
 
 
diff --git a/packages/runtime-sdk/tests/workerd-test/asgi-ws-disconnect/tests/test_ws_disconnect.py b/packages/runtime-sdk/tests/workerd-test/asgi-ws-disconnect/tests/test_ws_disconnect.py
index 7b478538..d3afd2e1 100644
--- a/packages/runtime-sdk/tests/workerd-test/asgi-ws-disconnect/tests/test_ws_disconnect.py
+++ b/packages/runtime-sdk/tests/workerd-test/asgi-ws-disconnect/tests/test_ws_disconnect.py
@@ -1,5 +1,6 @@
 import asyncio
 import contextlib
+import json
 
 import pytest
 from pyodide.ffi import create_proxy, to_js
@@ -61,9 +62,6 @@ async def _ws_connect(path):
     )
 
 
-import json
-
-
 async def _events():
     response = await asyncio.wait_for(
         env.SELF.fetch("http://example.com/ws-events"), TIMEOUT_S
diff --git a/ruff.toml b/ruff.toml
index ac0ef09f..98718701 100644
--- a/ruff.toml
+++ b/ruff.toml
@@ -18,15 +18,11 @@ select = [
 ]
 ignore = [
   "C901", # Too complex
-  "E402",
-  "E501",
-  "E731",
-  "E741",
+  "E501", # Line too long
   "PLR0911", # Too many return statements
   "PLR0915", # Too many statements
   "PLR2004", # Magic value
-  "PLW2901",
-  "UP031",
+  "PLW2901", # loop variable overwritten by assignment
   "UP038", # Use X | Y instead of (X, Y)
 ]
 flake8-comprehensions.allow-dict-calls-with-keyword-arguments = true