diff --git a/docs/en/docs/release-notes.md b/docs/en/docs/release-notes.md
index 0592b28081..3f5fa2fa6f 100644
--- a/docs/en/docs/release-notes.md
+++ b/docs/en/docs/release-notes.md
@@ -15,6 +15,7 @@ hide:
 
 ### Internal
 
+* ✅ Use custom `changing_dir` instead of `CLIRunner.isolated_filesystem` to set working dir. PR [#15616](https://github.com/fastapi/fastapi/pull/15616) by [@YuriiMotov](https://github.com/YuriiMotov).
 * ✅ Add `httpx2` test dependency to avoid deprecation warning. PR [#15603](https://github.com/fastapi/fastapi/pull/15603) by [@YuriiMotov](https://github.com/YuriiMotov).
 * ⬆ Bump the python-packages group with 15 updates. PR [#15594](https://github.com/fastapi/fastapi/pull/15594) by [@dependabot[bot]](https://github.com/apps/dependabot).
 * 👷 Configure Dependabot to group updates and update weekly. PR [#15560](https://github.com/fastapi/fastapi/pull/15560) by [@YuriiMotov](https://github.com/YuriiMotov).
diff --git a/scripts/tests/test_translation_fixer/conftest.py b/scripts/tests/test_translation_fixer/conftest.py
index 06366d5a45..5c5c0e2dc3 100644
--- a/scripts/tests/test_translation_fixer/conftest.py
+++ b/scripts/tests/test_translation_fixer/conftest.py
@@ -1,5 +1,8 @@
+import os
 import shutil
 import sys
+from collections.abc import Generator
+from contextlib import contextmanager
 from pathlib import Path
 
 import pytest
@@ -23,11 +26,20 @@ def pytest_collection_modifyitems(config, items: list[pytest.Item]) -> None:
             item.add_marker(skip_on_windows)
 
 
+@contextmanager
+def changing_dir(directory: str | Path) -> Generator[None, None, None]:
+    initial_dir = os.getcwd()
+    os.chdir(directory)
+    try:
+        yield
+    finally:
+        os.chdir(initial_dir)
+
+
 @pytest.fixture(name="runner")
-def get_runner():
-    runner = CliRunner()
-    with runner.isolated_filesystem():
-        yield runner
+def get_runner(tmp_path: Path):
+    with changing_dir(tmp_path):
+        yield CliRunner()
 
 
 @pytest.fixture(name="root_dir")