From b51ec36f2e442495de5e4c22ae51a8f5c44917eb Mon Sep 17 00:00:00 2001
From: Robert Hofer <1058012+hofrob@users.noreply.github.com>
Date: Sat, 20 Sep 2025 20:44:43 +0200
Subject: [PATCH] =?UTF-8?q?=E2=9C=A8=20=20Allow=20`None`=20as=20return=20t?=
 =?UTF-8?q?ype=20for=20bodiless=20responses=20(#9425)?=
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Co-authored-by: Sebastián Ramírez <tiangolo@gmail.com>
---
 fastapi/dependencies/utils.py                   |  2 ++
 .../test_return_none_stringified_annotations.py | 17 +++++++++++++++++
 2 files changed, 19 insertions(+)
 create mode 100644 tests/test_return_none_stringified_annotations.py

diff --git a/fastapi/dependencies/utils.py b/fastapi/dependencies/utils.py
index 8dd0a14c8..dc663f548 100644
--- a/fastapi/dependencies/utils.py
+++ b/fastapi/dependencies/utils.py
@@ -254,6 +254,8 @@ def get_typed_annotation(annotation: Any, globalns: Dict[str, Any]) -> Any:
     if isinstance(annotation, str):
         annotation = ForwardRef(annotation)
         annotation = evaluate_forwardref(annotation, globalns, globalns)
+        if annotation is type(None):
+            return None
     return annotation
 
 
diff --git a/tests/test_return_none_stringified_annotations.py b/tests/test_return_none_stringified_annotations.py
new file mode 100644
index 000000000..be052d532
--- /dev/null
+++ b/tests/test_return_none_stringified_annotations.py
@@ -0,0 +1,17 @@
+import http
+
+from fastapi import FastAPI
+from fastapi.testclient import TestClient
+
+
+def test_no_content():
+    app = FastAPI()
+
+    @app.get("/no-content", status_code=http.HTTPStatus.NO_CONTENT)
+    def return_no_content() -> "None":
+        return
+
+    client = TestClient(app)
+    response = client.get("/no-content")
+    assert response.status_code == http.HTTPStatus.NO_CONTENT, response.text
+    assert not response.content