diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 9a8d9bb6c..e4e156315 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -14,7 +14,7 @@ jobs:
       name: deploy
 
     steps:
-      - uses: "actions/checkout@v3"
+      - uses: "actions/checkout@v4"
       - uses: "actions/setup-python@v4"
         with:
           python-version: "3.11"
diff --git a/.github/workflows/test-suite.yml b/.github/workflows/test-suite.yml
index e04af7b51..c3ad08f14 100644
--- a/.github/workflows/test-suite.yml
+++ b/.github/workflows/test-suite.yml
@@ -17,7 +17,7 @@ jobs:
         python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
 
     steps:
-      - uses: "actions/checkout@v3"
+      - uses: "actions/checkout@v4"
       - uses: "actions/setup-python@v4"
         with:
           python-version: "${{ matrix.python-version }}"
diff --git a/docs/js/chat.js b/docs/js/chat.js
deleted file mode 100644
index c82454918..000000000
--- a/docs/js/chat.js
+++ /dev/null
@@ -1,3 +0,0 @@
-((window.gitter = {}).chat = {}).options = {
-  room: 'encode/community'
-};
diff --git a/docs/js/sidecar-1.5.0.js b/docs/js/sidecar-1.5.0.js
deleted file mode 100644
index 44899c4b3..000000000
--- a/docs/js/sidecar-1.5.0.js
+++ /dev/null
@@ -1,6 +0,0 @@
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- * https://sidecar.gitter.im/
- */
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saturate(150)}.gitter-chat-embed-action-bar-item-pop-out{box-sizing:border-box;margin-right:-4px;background-image:url(data:image/svg+xml;base64,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)}.gitter-chat-embed-action-bar-item-collapse-chat{box-sizing:border-box;background-image:url(data:image/svg+xml;base64,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)}.gitter-open-chat-button{z-index:100;position:fixed;bottom:0;right:10px;padding:1em 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e&&(e=[[null,e,""]]);for(var r={},n=0;n<this.length;n++){var o=this[n][0];"number"==typeof o&&(r[o]=!0)}for(n=0;n<e.length;n++){var a=e[n];"number"==typeof a[0]&&r[a[0]]||(i&&!a[2]?a[2]=i:i&&(a[2]="("+a[2]+") and ("+i+")"),t.push(a))}},t}}]);
-//# sourceMappingURL=sidecar.js.map
diff --git a/mkdocs.yml b/mkdocs.yml
index c64285fa7..3cde34408 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -58,7 +58,3 @@ markdown_extensions:
   - pymdownx.superfences
   - pymdownx.tabbed:
       alternate_style: true
-
-extra_javascript:
-  - 'js/chat.js'
-  - 'js/sidecar-1.5.0.js'
diff --git a/requirements.txt b/requirements.txt
index 5a65b4568..c6d8dadc4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,24 +2,24 @@
 -e .[full]
 
 # Testing
-black==23.7.0
-coverage==7.3.0
+black==23.10.1
+coverage==7.3.1
 importlib-metadata==6.8.0
 mypy==1.5.1
-ruff==0.0.285
-typing_extensions==4.7.1
-types-contextvars==2.4.7.2
-types-PyYAML==6.0.12.11
+ruff==0.1.3
+typing_extensions==4.8.0
+types-contextvars==2.4.7.3
+types-PyYAML==6.0.12.12
 types-dataclasses==0.6.6
 pytest==7.4.0
-trio==0.21.0
-anyio==3.7.1
+trio==0.22.2
+anyio==4.0.0
 
 # Documentation
-mkdocs==1.5.2
-mkdocs-material==9.1.17
+mkdocs==1.5.3
+mkdocs-material==9.4.7
 mkautodoc==0.2.0
 
 # Packaging
-build==0.10.0
+build==1.0.3
 twine==4.0.2
diff --git a/starlette/testclient.py b/starlette/testclient.py
index bfac4bb9f..a0046f2ff 100644
--- a/starlette/testclient.py
+++ b/starlette/testclient.py
@@ -153,8 +153,8 @@ def send_json(self, data: typing.Any, mode: str = "text") -> None:
         else:
             self.send({"type": "websocket.receive", "bytes": text.encode("utf-8")})
 
-    def close(self, code: int = 1000) -> None:
-        self.send({"type": "websocket.disconnect", "code": code})
+    def close(self, code: int = 1000, reason: typing.Union[str, None] = None) -> None:
+        self.send({"type": "websocket.disconnect", "code": code, "reason": reason})
 
     def receive(self) -> Message:
         message = self._send_queue.get()
diff --git a/starlette/websockets.py b/starlette/websockets.py
index 4704dff72..859560857 100644
--- a/starlette/websockets.py
+++ b/starlette/websockets.py
@@ -102,7 +102,7 @@ async def accept(
 
     def _raise_on_disconnect(self, message: Message) -> None:
         if message["type"] == "websocket.disconnect":
-            raise WebSocketDisconnect(message["code"])
+            raise WebSocketDisconnect(message["code"], message.get("reason"))
 
     async def receive_text(self) -> str:
         if self.application_state != WebSocketState.CONNECTED:
diff --git a/tests/middleware/test_base.py b/tests/middleware/test_base.py
index cf4780cce..650f4aee1 100644
--- a/tests/middleware/test_base.py
+++ b/tests/middleware/test_base.py
@@ -396,7 +396,18 @@ async def send(message):
 def test_app_receives_http_disconnect_while_sending_if_discarded(test_client_factory):
     class DiscardingMiddleware(BaseHTTPMiddleware):
         async def dispatch(self, request, call_next):
-            await call_next(request)
+            # As a matter of ordering, this test targets the case where the downstream
+            # app response is discarded while it is sending a response body.
+            # We need to wait for the downstream app to begin sending a response body
+            # before sending the middleware response that will overwrite the downstream
+            # response.
+            downstream_app_response = await call_next(request)
+            body_generator = downstream_app_response.body_iterator
+            try:
+                await body_generator.__anext__()
+            finally:
+                await body_generator.aclose()
+
             return PlainTextResponse("Custom")
 
     async def downstream_app(scope, receive, send):
@@ -411,17 +422,21 @@ async def downstream_app(scope, receive, send):
         )
         async with anyio.create_task_group() as task_group:
 
-            async def cancel_on_disconnect():
+            async def cancel_on_disconnect(*, task_status=anyio.TASK_STATUS_IGNORED):
+                task_status.started()
                 while True:
                     message = await receive()
                     if message["type"] == "http.disconnect":
                         task_group.cancel_scope.cancel()
                         break
 
-            task_group.start_soon(cancel_on_disconnect)
+            # Using start instead of start_soon to ensure that
+            # cancel_on_disconnect is scheduled by the event loop
+            # before we start returning the body
+            await task_group.start(cancel_on_disconnect)
 
             # A timeout is set for 0.1 second in order to ensure that
-            # cancel_on_disconnect is scheduled by the event loop
+            # we never deadlock the test run in an infinite loop
             with anyio.move_on_after(0.1):
                 while True:
                     await send(
diff --git a/tests/test_websockets.py b/tests/test_websockets.py
index 71bccd455..65e16671d 100644
--- a/tests/test_websockets.py
+++ b/tests/test_websockets.py
@@ -1,11 +1,12 @@
 import sys
-from typing import Any, MutableMapping
+from typing import Any, Callable, MutableMapping
 
 import anyio
 import pytest
 from anyio.abc import ObjectReceiveStream, ObjectSendStream
 
 from starlette import status
+from starlette.testclient import TestClient
 from starlette.types import Receive, Scope, Send
 from starlette.websockets import WebSocket, WebSocketDisconnect, WebSocketState
 
@@ -209,22 +210,25 @@ async def app(scope: Scope, receive: Receive, send: Send) -> None:
         assert data == {"hello": "world"}
 
 
-def test_client_close(test_client_factory):
+def test_client_close(test_client_factory: Callable[..., TestClient]):
     close_code = None
+    close_reason = None
 
     async def app(scope: Scope, receive: Receive, send: Send) -> None:
-        nonlocal close_code
+        nonlocal close_code, close_reason
         websocket = WebSocket(scope, receive=receive, send=send)
         await websocket.accept()
         try:
             await websocket.receive_text()
         except WebSocketDisconnect as exc:
             close_code = exc.code
+            close_reason = exc.reason
 
     client = test_client_factory(app)
     with client.websocket_connect("/") as websocket:
-        websocket.close(code=status.WS_1001_GOING_AWAY)
+        websocket.close(code=status.WS_1001_GOING_AWAY, reason="Going Away")
     assert close_code == status.WS_1001_GOING_AWAY
+    assert close_reason == "Going Away"
 
 
 def test_application_close(test_client_factory):