diff --git a/projects/jupyter-server-ydoc/jupyter_server_ydoc/pytest_plugin.py b/projects/jupyter-server-ydoc/jupyter_server_ydoc/pytest_plugin.py
index afd2f6c3..8bb8479e 100644
--- a/projects/jupyter-server-ydoc/jupyter_server_ydoc/pytest_plugin.py
+++ b/projects/jupyter-server-ydoc/jupyter_server_ydoc/pytest_plugin.py
@@ -9,14 +9,19 @@
 
 import nbformat
 import pytest
+from httpx_ws import aconnect_ws
 from jupyter_server_ydoc.loaders import FileLoader
 from jupyter_server_ydoc.rooms import DocumentRoom
 from jupyter_server_ydoc.stores import SQLiteYStore
 from jupyter_ydoc import YNotebook, YUnicode
 from pycrdt_websocket import WebsocketProvider
-from httpx_ws import aconnect_ws
 
-from .test_utils import FakeContentsManager, FakeEventLogger, FakeFileIDManager, Websocket
+from .test_utils import (
+    FakeContentsManager,
+    FakeEventLogger,
+    FakeFileIDManager,
+    Websocket,
+)
 
 
 @pytest.fixture
@@ -139,9 +144,12 @@ async def _inner(format: str, type: str, path: str) -> Any:
         resp = await rtc_fetch_session(format, type, path)
         data = json.loads(resp.body.decode("utf-8"))
         room_name = f"{data['format']}:{data['type']}:{data['fileId']}"
-        return aconnect_ws(
-            f"http://127.0.0.1:{jp_http_port}{jp_base_url}api/collaboration/room/{room_name}?sessionId={data['sessionId']}"
-        ), room_name
+        return (
+            aconnect_ws(
+                f"http://127.0.0.1:{jp_http_port}{jp_base_url}api/collaboration/room/{room_name}?sessionId={data['sessionId']}"
+            ),
+            room_name,
+        )
 
     return _inner
 
diff --git a/projects/jupyter-server-ydoc/jupyter_server_ydoc/test_utils.py b/projects/jupyter-server-ydoc/jupyter_server_ydoc/test_utils.py
index fc0263bc..8ced6ea0 100644
--- a/projects/jupyter-server-ydoc/jupyter_server_ydoc/test_utils.py
+++ b/projects/jupyter-server-ydoc/jupyter_server_ydoc/test_utils.py
@@ -6,8 +6,8 @@
 from datetime import datetime
 from typing import Any
 
-from jupyter_server import _tz as tz
 from anyio import Lock
+from jupyter_server import _tz as tz
 
 
 class FakeFileIDManager:
diff --git a/tests/test_documents.py b/tests/test_documents.py
index 4b1428dc..9065a1aa 100644
--- a/tests/test_documents.py
+++ b/tests/test_documents.py
@@ -11,8 +11,8 @@
 
 import pytest
 from anyio import create_task_group, sleep
-from pycrdt_websocket import WebsocketProvider
 from jupyter_server_ydoc.test_utils import Websocket
+from pycrdt_websocket import WebsocketProvider
 
 jupyter_ydocs = {ep.name: ep.load() for ep in entry_points(group="jupyter_ydoc")}
 
diff --git a/tests/test_handlers.py b/tests/test_handlers.py
index c8708c05..7cb55e0b 100644
--- a/tests/test_handlers.py
+++ b/tests/test_handlers.py
@@ -79,9 +79,7 @@ def _on_document_change(target: str, e: Any) -> None:
     doc.observe(_on_document_change)
 
     websocket, room_name = await rtc_connect_doc_client("text", "file", path)
-    async with websocket as ws, WebsocketProvider(
-        doc.ydoc, Websocket(ws, room_name)
-    ):
+    async with websocket as ws, WebsocketProvider(doc.ydoc, Websocket(ws, room_name)):
         await event.wait()
         await sleep(0.1)
 
@@ -117,9 +115,7 @@ async def my_listener(logger: EventLogger, schema_id: str, data: dict) -> None:
     )
 
     websocket, room_name = await rtc_connect_doc_client("text", "file", path)
-    async with websocket as ws, WebsocketProvider(
-        doc.ydoc, Websocket(ws, room_name)
-    ):
+    async with websocket as ws, WebsocketProvider(doc.ydoc, Websocket(ws, room_name)):
         await event.wait()
         await sleep(0.1)
 
@@ -151,9 +147,7 @@ def _on_document_change(target: str, e: Any) -> None:
     doc.observe(_on_document_change)
 
     websocket, room_name = await rtc_connect_doc_client("text", "file", path)
-    async with websocket as ws, WebsocketProvider(
-        doc.ydoc, Websocket(ws, room_name)
-    ):
+    async with websocket as ws, WebsocketProvider(doc.ydoc, Websocket(ws, room_name)):
         await event.wait()
         await sleep(0.1)
 
@@ -178,9 +172,7 @@ async def my_listener(logger: EventLogger, schema_id: str, data: dict) -> None:
 
     try:
         websocket, room_name = await rtc_connect_doc_client("text2", "file2", path2)
-        async with websocket as ws, WebsocketProvider(
-            doc.ydoc, Websocket(ws, room_name)
-        ):
+        async with websocket as ws, WebsocketProvider(doc.ydoc, Websocket(ws, room_name)):
             await event.wait()
             await sleep(0.1)
     except Exception:
@@ -188,9 +180,7 @@ async def my_listener(logger: EventLogger, schema_id: str, data: dict) -> None:
 
     try:
         websocket, room_name = await rtc_connect_doc_client("text2", "file2", path2)
-        async with websocket as ws, WebsocketProvider(
-            doc.ydoc, Websocket(ws, room_name)
-        ):
+        async with websocket as ws, WebsocketProvider(doc.ydoc, Websocket(ws, room_name)):
             await event.wait()
             await sleep(0.1)
     except Exception: