diff --git a/httpcore/_async/connection_pool.py b/httpcore/_async/connection_pool.py
index e993afea..5d701bd5 100644
--- a/httpcore/_async/connection_pool.py
+++ b/httpcore/_async/connection_pool.py
@@ -1,7 +1,14 @@
 import ssl
 import sys
 from types import TracebackType
-from typing import AsyncIterable, AsyncIterator, Iterable, List, Optional, Type
+from typing import (  # noqa: F811
+    AsyncIterable,
+    AsyncIterator,
+    Iterable,
+    List,
+    Optional,
+    Type,
+)
 
 from .._backends.auto import AutoBackend
 from .._backends.base import SOCKET_OPTION, AsyncNetworkBackend
diff --git a/httpcore/_sync/connection_pool.py b/httpcore/_sync/connection_pool.py
index 5894261a..a9eddf99 100644
--- a/httpcore/_sync/connection_pool.py
+++ b/httpcore/_sync/connection_pool.py
@@ -1,7 +1,14 @@
 import ssl
 import sys
 from types import TracebackType
-from typing import Iterable, Iterator, Iterable, List, Optional, Type
+from typing import (  # noqa: F811
+    Iterable,
+    Iterator,
+    Iterable,
+    List,
+    Optional,
+    Type,
+)
 
 from .._backends.sync import SyncBackend
 from .._backends.base import SOCKET_OPTION, NetworkBackend
diff --git a/pyproject.toml b/pyproject.toml
index 9bf77ea4..e5c20dad 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -104,12 +104,6 @@ include = [
     "tests/*",
 ]
 
-[tool.ruff]
-exclude = [
-    "httpcore/_sync",
-    "tests/_sync",
-]
-
 [tool.ruff.lint]
 select = [
     "E",
@@ -120,3 +114,8 @@ select = [
 
 [tool.ruff.lint.isort]
 combine-as-imports = true
+
+[tool.ruff.lint.per-file-ignores]
+# needed for unasync.py
+"httpcore/_sync/*" = ["I001"]
+"tests/_sync/*" = ["I001"]
diff --git a/tests/_async/test_integration.py b/tests/_async/test_integration.py
index 1970531d..afa5dd9e 100644
--- a/tests/_async/test_integration.py
+++ b/tests/_async/test_integration.py
@@ -1,6 +1,6 @@
 import ssl
 
-import pytest
+import pytest  # noqa: F401
 
 import httpcore
 
diff --git a/tests/_sync/test_integration.py b/tests/_sync/test_integration.py
index e3327e69..07254f66 100644
--- a/tests/_sync/test_integration.py
+++ b/tests/_sync/test_integration.py
@@ -1,6 +1,6 @@
 import ssl
 
-import pytest
+import pytest  # noqa: F401
 
 import httpcore