diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 7348464..3d10bf5 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -4,11 +4,11 @@ repos:
   hooks:
   - id: trailing-whitespace
 - repo: https://github.com/psf/black
-  rev: 22.12.0
+  rev: 23.1.0
   hooks:
   - id: black
     language_version: python3
 - repo: https://github.com/pycqa/isort
-  rev: 5.11.4
+  rev: 5.12.0
   hooks:
   - id: isort
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..d60ae35
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,7 @@
+{
+  "editor.formatOnSave": true,
+  "python.formatting.provider": "black",
+  "python.testing.pytestArgs": ["-v"],
+  "python.testing.unittestEnabled": false,
+  "python.testing.pytestEnabled": true
+}
diff --git a/scanpydoc/elegant_typehints/formatting.py b/scanpydoc/elegant_typehints/formatting.py
index a9c18f2..2e3f169 100644
--- a/scanpydoc/elegant_typehints/formatting.py
+++ b/scanpydoc/elegant_typehints/formatting.py
@@ -78,7 +78,7 @@ def _format_terse(annotation: Type[Any], config: Config) -> str:
 
 
 def format_annotation(annotation: Type[Any], config: Config) -> Optional[str]:
-    r"""Generate reStructuredText containing links to the types.
+    """Generate reStructuredText containing links to the types.
 
     Unlike :func:`sphinx_autodoc_typehints.format_annotation`,
     it tries to achieve a simpler style as seen in numeric packages like numpy.
@@ -93,7 +93,7 @@ def format_annotation(annotation: Type[Any], config: Config) -> Optional[str]:
 
     curframe = inspect.currentframe()
     calframe = inspect.getouterframes(curframe, 2)
-    if calframe[2].function == "process_docstring" or (
+    if calframe[2].function in {"process_docstring", "_inject_signature"} or (
         calframe[2].function == "_inject_types_to_docstring"
         and calframe[3].function == "process_docstring"
     ):
diff --git a/tests/test_elegant_typehints.py b/tests/test_elegant_typehints.py
index 873e094..ae388f6 100644
--- a/tests/test_elegant_typehints.py
+++ b/tests/test_elegant_typehints.py
@@ -193,7 +193,6 @@ def test_classes_get_added(app, parse):
         # t.NoReturn,
         t.Callable[[int], None],
         # t.ClassVar[t.Any],
-        t.Optional[int],
         t.Tuple[int, str],
         t.Tuple[float, ...],
         t.Union[int, str],
@@ -212,9 +211,6 @@ def test_typing_classes(app, annotation, formatter):
     )
     if formatter is _format_terse and name in {"Union", "Callable"}:
         pytest.skip("Tested elsewhere")
-    args = get_args(annotation)
-    if name == "Union" and len(args) == 2 and type(None) in args:
-        name = "Optional"
     output = formatter(annotation, app.config)
     assert output is None or output.startswith(f":py:data:`typing.{name}")
 
@@ -331,9 +327,9 @@ def fn_test():
         if not re.match("^:(rtype|param|annotation-(full|terse)):", l)
     ]
     assert lines == [
-        rf":return: foo : {foo_rendered}",
+        f":return: foo : {foo_rendered}",
         "             A foo!",
-        r"         bar : :py:class:`int`",
+        "         bar : :py:class:`int`",
         "             A bar!",
     ]