diff --git a/granian/_granian.pyi b/granian/_granian.pyi
index 5b5da0dc..836b1283 100644
--- a/granian/_granian.pyi
+++ b/granian/_granian.pyi
@@ -2,7 +2,6 @@ from typing import Any, Dict, List, Optional, Tuple
 
 from ._types import WebsocketMessage
 
-
 class ASGIScope:
     def as_dict(self, root_path: str) -> Dict[str, Any]: ...
 
diff --git a/pyproject.toml b/pyproject.toml
index 3b3f7822..0f4d07b9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -90,13 +90,16 @@ extend-ignore = [
 ]
 flake8-quotes = { inline-quotes = 'single', multiline-quotes = 'double' }
 mccabe = { max-complexity = 13 }
-per-file-ignores = { 'tests/**' = ['B018', 'S110', 'S501'] }
 
 [tool.ruff.isort]
 combine-as-imports = true
 lines-after-imports = 2
 known-first-party = ['granian', 'tests']
 
+[tool.ruff.per-file-ignores]
+'granian/_granian.pyi' = ['I001']
+'tests/**' = ['B018', 'S110', 'S501']
+
 [tool.black]
 color = true
 line-length = 120