diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 19b93e64c..344c8d66a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -19,7 +19,6 @@ jobs:
 
       - uses: actions/setup-python@v4
         with:
-          python-version: "3.8"
           cache: "poetry"
 
       - name: Use Node.js
diff --git a/.python-version b/.python-version
index 143c2f5d0..9ad6380c1 100644
--- a/.python-version
+++ b/.python-version
@@ -1 +1 @@
-3.8.19
+3.8.18
diff --git a/django-stubs/db/transaction.pyi b/django-stubs/db/transaction.pyi
index 1d7adb72f..d5f0bd23a 100644
--- a/django-stubs/db/transaction.pyi
+++ b/django-stubs/db/transaction.pyi
@@ -1,8 +1,8 @@
 from collections.abc import Callable, Iterator
 from contextlib import contextmanager
+from types import TracebackType
 from typing import Any, TypeVar, overload
 
-from types import TracebackType
 from django.db import ProgrammingError
 
 class TransactionManagementError(ProgrammingError): ...
@@ -40,8 +40,9 @@ class Atomic:
         self,
         exc_type: type[BaseException] | None,
         exc_value: BaseException | None,
-        traceback: TracebackType | None, /
+        traceback: TracebackType | None,
     ) -> None: ...
+
 # Bare decorator
 @overload
 def atomic(using: _C) -> _C: ...