diff --git a/starlette/endpoints.py b/starlette/endpoints.py
index eb1dace42..107690266 100644
--- a/starlette/endpoints.py
+++ b/starlette/endpoints.py
@@ -74,7 +74,7 @@ async def dispatch(self) -> None:
                 if message["type"] == "websocket.receive":
                     data = await self.decode(websocket, message)
                     await self.on_receive(websocket, data)
-                elif message["type"] == "websocket.disconnect":
+                elif message["type"] == "websocket.disconnect":  # pragma: no branch
                     close_code = int(message.get("code") or status.WS_1000_NORMAL_CLOSURE)
                     break
         except Exception as exc:
diff --git a/starlette/middleware/wsgi.py b/starlette/middleware/wsgi.py
index 71f4ab5de..6e0a3fae6 100644
--- a/starlette/middleware/wsgi.py
+++ b/starlette/middleware/wsgi.py
@@ -121,7 +121,7 @@ def start_response(
         exc_info: typing.Any = None,
     ) -> None:
         self.exc_info = exc_info
-        if not self.response_started:
+        if not self.response_started:  # pragma: no branch
             self.response_started = True
             status_code_string, _ = status.split(" ", 1)
             status_code = int(status_code_string)
diff --git a/starlette/templating.py b/starlette/templating.py
index 78bfb8c26..6b01aac92 100644
--- a/starlette/templating.py
+++ b/starlette/templating.py
@@ -43,7 +43,7 @@ def __init__(
     async def __call__(self, scope: Scope, receive: Receive, send: Send) -> None:
         request = self.context.get("request", {})
         extensions = request.get("extensions", {})
-        if "http.response.debug" in extensions:
+        if "http.response.debug" in extensions:  # pragma: no branch
             await send(
                 {
                     "type": "http.response.debug",
diff --git a/tests/test_responses.py b/tests/test_responses.py
index 9f801419a..28f2feb2d 100644
--- a/tests/test_responses.py
+++ b/tests/test_responses.py
@@ -393,6 +393,18 @@ async def app(scope: Scope, receive: Receive, send: Send) -> None:
     assert response.headers["set-cookie"] == "mycookie=myvalue; SameSite=lax"
 
 
+def test_set_cookie_samesite_none(test_client_factory: TestClientFactory) -> None:
+    async def app(scope: Scope, receive: Receive, send: Send) -> None:
+        response = Response("Hello, world!", media_type="text/plain")
+        response.set_cookie("mycookie", "myvalue", samesite=None)
+        await response(scope, receive, send)
+
+    client = test_client_factory(app)
+    response = client.get("/")
+    assert response.text == "Hello, world!"
+    assert response.headers["set-cookie"] == "mycookie=myvalue; Path=/"
+
+
 @pytest.mark.parametrize(
     "expires",
     [
diff --git a/tests/test_staticfiles.py b/tests/test_staticfiles.py
index 8f7423593..b4f131719 100644
--- a/tests/test_staticfiles.py
+++ b/tests/test_staticfiles.py
@@ -216,6 +216,21 @@ def test_staticfiles_304_with_etag_match(tmpdir: Path, test_client_factory: Test
     assert second_resp.content == b""
 
 
+def test_staticfiles_200_with_etag_mismatch(tmpdir: Path, test_client_factory: TestClientFactory) -> None:
+    path = os.path.join(tmpdir, "example.txt")
+    with open(path, "w") as file:
+        file.write("<file content>")
+
+    app = StaticFiles(directory=tmpdir)
+    client = test_client_factory(app)
+    first_resp = client.get("/example.txt")
+    assert first_resp.status_code == 200
+    assert first_resp.headers["etag"] != '"123"'
+    second_resp = client.get("/example.txt", headers={"if-none-match": '"123"'})
+    assert second_resp.status_code == 200
+    assert second_resp.content == b"<file content>"
+
+
 def test_staticfiles_304_with_last_modified_compare_last_req(
     tmpdir: Path, test_client_factory: TestClientFactory
 ) -> None: