diff --git a/pyproject.toml b/pyproject.toml
index 5de46a4e8..4020cfb96 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -222,7 +222,6 @@ ignore = [
     "PLW0603",  # using the global statement to update variables is discouraged
     "PLW2901",  # outer loop variable overwritten by inner assignment
     # flake8-pytest-style
-    "PT003",  # `scope='function'` is implied in `@pytest.fixture()`
     "PT011",  # `pytest.raises(ValueError)` is too broad, set the `match` parameter
     # flake8-use-pathlib
     "PTH",
diff --git a/sphinx/testing/fixtures.py b/sphinx/testing/fixtures.py
index d8335fd6a..2eab98ead 100644
--- a/sphinx/testing/fixtures.py
+++ b/sphinx/testing/fixtures.py
@@ -126,7 +126,7 @@ def test_params(request: Any) -> dict:
     return result
 
 
-@pytest.fixture(scope='function')
+@pytest.fixture()
 def app(test_params: dict, app_params: tuple[dict, dict], make_app: Callable,
         shared_result: SharedResult) -> Generator[SphinxTestApp, None, None]:
     """
@@ -147,7 +147,7 @@ def app(test_params: dict, app_params: tuple[dict, dict], make_app: Callable,
         shared_result.store(test_params['shared_result'], app_)
 
 
-@pytest.fixture(scope='function')
+@pytest.fixture()
 def status(app: SphinxTestApp) -> StringIO:
     """
     Back-compatibility for testing with previous @with_app decorator
@@ -155,7 +155,7 @@ def status(app: SphinxTestApp) -> StringIO:
     return app._status
 
 
-@pytest.fixture(scope='function')
+@pytest.fixture()
 def warning(app: SphinxTestApp) -> StringIO:
     """
     Back-compatibility for testing with previous @with_app decorator
diff --git a/tests/test_ext_autosummary.py b/tests/test_ext_autosummary.py
index 93cf195af..43f3ae00c 100644
--- a/tests/test_ext_autosummary.py
+++ b/tests/test_ext_autosummary.py
@@ -44,7 +44,7 @@ default_kw = {
 }
 
 
-@pytest.fixture(scope='function', autouse=True)
+@pytest.fixture(autouse=True)
 def _unload_target_module():
     sys.modules.pop('target', None)