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 efdac129..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 websockets import connect
 
-from .test_utils import FakeContentsManager, FakeEventLogger, FakeFileIDManager
+from .test_utils import (
+    FakeContentsManager,
+    FakeEventLogger,
+    FakeFileIDManager,
+    Websocket,
+)
 
 
 @pytest.fixture
@@ -126,8 +131,8 @@ def _inner(format: str, type: str, path: str) -> Any:
 @pytest.fixture
 def rtc_connect_awareness_client(jp_http_port, jp_base_url):
     async def _inner(room_id: str) -> Any:
-        return connect(
-            f"ws://127.0.0.1:{jp_http_port}{jp_base_url}api/collaboration/room/{room_id}"
+        return aconnect_ws(
+            f"http://127.0.0.1:{jp_http_port}{jp_base_url}api/collaboration/room/{room_id}"
         )
 
     return _inner
@@ -138,8 +143,12 @@ def rtc_connect_doc_client(jp_http_port, jp_base_url, rtc_fetch_session):
     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"))
-        return connect(
-            f"ws://127.0.0.1:{jp_http_port}{jp_base_url}api/collaboration/room/{data['format']}:{data['type']}:{data['fileId']}?sessionId={data['sessionId']}"
+        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 _inner
@@ -162,9 +171,8 @@ def _on_document_change(target: str, e: Any) -> None:
 
         doc.observe(_on_document_change)
 
-        async with await rtc_connect_doc_client(format, type, path) as ws, WebsocketProvider(
-            doc.ydoc, ws
-        ):
+        websocket, room_name = await rtc_connect_doc_client(format, type, path)
+        async with websocket as ws, WebsocketProvider(doc.ydoc, Websocket(ws, room_name)):
             await event.wait()
             await sleep(0.1)
 
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 f1140322..24528004 100644
--- a/projects/jupyter-server-ydoc/jupyter_server_ydoc/test_utils.py
+++ b/projects/jupyter-server-ydoc/jupyter_server_ydoc/test_utils.py
@@ -6,6 +6,7 @@
 from datetime import datetime
 from typing import Any
 
+from anyio import Lock
 from jupyter_server import _tz as tz
 
 
@@ -55,3 +56,32 @@ def save_content(self, model: dict[str, Any], path: str) -> dict:
 class FakeEventLogger:
     def emit(self, schema_id: str, data: dict) -> None:
         print(data)
+
+
+class Websocket:
+    def __init__(self, websocket: Any, path: str):
+        self._websocket = websocket
+        self._path = path
+        self._send_lock = Lock()
+
+    @property
+    def path(self) -> str:
+        return self._path
+
+    def __aiter__(self):
+        return self
+
+    async def __anext__(self) -> bytes:
+        try:
+            message = await self.recv()
+        except Exception:
+            raise StopAsyncIteration()
+        return message
+
+    async def send(self, message: bytes) -> None:
+        async with self._send_lock:
+            await self._websocket.send_bytes(message)
+
+    async def recv(self) -> bytes:
+        b = await self._websocket.receive_bytes()
+        return bytes(b)
diff --git a/projects/jupyter-server-ydoc/pyproject.toml b/projects/jupyter-server-ydoc/pyproject.toml
index 7007980e..dce09301 100644
--- a/projects/jupyter-server-ydoc/pyproject.toml
+++ b/projects/jupyter-server-ydoc/pyproject.toml
@@ -45,7 +45,8 @@ test = [
     "jupyter_server_fileid[test]",
     "pytest>=7.0",
     "pytest-cov",
-    "websockets",
+    "anyio",
+    "httpx-ws >=0.5.2",
     "importlib_metadata >=4.8.3; python_version<'3.10'",
 ]
 
diff --git a/pyproject.toml b/pyproject.toml
index 32e7cecd..d17177ee 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -106,6 +106,8 @@ filterwarnings = [
     "ignore:.*datetime.utcfromtimestamp\\(\\) is deprecated.*:DeprecationWarning:",
     # From anyio https://github.com/agronholm/anyio/pull/715
     'ignore:Unclosed <MemoryObjectSendStream:ResourceWarning',
+    # see https://github.com/python/cpython/issues/126259
+    'ignore:unclosed database in <sqlite3.Connection object',
 ]
 
 [tool.mypy]
diff --git a/tests/test_documents.py b/tests/test_documents.py
index 6573ad29..9065a1aa 100644
--- a/tests/test_documents.py
+++ b/tests/test_documents.py
@@ -11,6 +11,7 @@
 
 import pytest
 from anyio import create_task_group, sleep
+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")}
@@ -32,12 +33,12 @@ async def test_dirty(
     await rtc_create_file(file_path)
     jupyter_ydoc = jupyter_ydocs[file_type]()
 
-    async with await rtc_connect_doc_client(file_format, file_type, file_path) as ws:
-        async with WebsocketProvider(jupyter_ydoc.ydoc, ws):
-            for _ in range(2):
-                jupyter_ydoc.dirty = True
-                await sleep(rtc_document_save_delay * 1.5)
-                assert not jupyter_ydoc.dirty
+    websocket, room_name = await rtc_connect_doc_client(file_format, file_type, file_path)
+    async with websocket as ws, WebsocketProvider(jupyter_ydoc.ydoc, Websocket(ws, room_name)):
+        for _ in range(2):
+            jupyter_ydoc.dirty = True
+            await sleep(rtc_document_save_delay * 1.5)
+            assert not jupyter_ydoc.dirty
 
 
 async def cleanup(jp_serverapp):
@@ -59,7 +60,8 @@ async def test_room_concurrent_initialization(
     await rtc_create_file(file_path)
 
     async def connect(file_format, file_type, file_path):
-        async with await rtc_connect_doc_client(file_format, file_type, file_path) as ws:
+        websocket, room_name = await rtc_connect_doc_client(file_format, file_type, file_path)
+        async with websocket as ws:
             pass
 
     t0 = time()
@@ -84,7 +86,8 @@ async def test_room_sequential_opening(
 
     async def connect(file_format, file_type, file_path):
         t0 = time()
-        async with await rtc_connect_doc_client(file_format, file_type, file_path) as ws:
+        websocket, room_name = await rtc_connect_doc_client(file_format, file_type, file_path)
+        async with websocket as ws:
             pass
         t1 = time()
         return t1 - t0
diff --git a/tests/test_handlers.py b/tests/test_handlers.py
index 96aaded5..7cb55e0b 100644
--- a/tests/test_handlers.py
+++ b/tests/test_handlers.py
@@ -8,6 +8,7 @@
 from typing import Any
 
 from jupyter_events.logger import EventLogger
+from jupyter_server_ydoc.test_utils import Websocket
 from jupyter_ydoc import YUnicode
 from pycrdt_websocket import WebsocketProvider
 
@@ -77,9 +78,8 @@ def _on_document_change(target: str, e: Any) -> None:
     doc = YUnicode()
     doc.observe(_on_document_change)
 
-    async with await rtc_connect_doc_client("text", "file", path) as ws, WebsocketProvider(
-        doc.ydoc, ws
-    ):
+    websocket, room_name = await rtc_connect_doc_client("text", "file", path)
+    async with websocket as ws, WebsocketProvider(doc.ydoc, Websocket(ws, room_name)):
         await event.wait()
         await sleep(0.1)
 
@@ -114,9 +114,8 @@ async def my_listener(logger: EventLogger, schema_id: str, data: dict) -> None:
         listener=my_listener,
     )
 
-    async with await rtc_connect_doc_client("text", "file", path) as ws, WebsocketProvider(
-        doc.ydoc, ws
-    ):
+    websocket, room_name = await rtc_connect_doc_client("text", "file", path)
+    async with websocket as ws, WebsocketProvider(doc.ydoc, Websocket(ws, room_name)):
         await event.wait()
         await sleep(0.1)
 
@@ -147,9 +146,8 @@ def _on_document_change(target: str, e: Any) -> None:
     doc = YUnicode()
     doc.observe(_on_document_change)
 
-    async with await rtc_connect_doc_client("text", "file", path) as ws, WebsocketProvider(
-        doc.ydoc, ws
-    ):
+    websocket, room_name = await rtc_connect_doc_client("text", "file", path)
+    async with websocket as ws, WebsocketProvider(doc.ydoc, Websocket(ws, room_name)):
         await event.wait()
         await sleep(0.1)
 
@@ -173,18 +171,16 @@ async def my_listener(logger: EventLogger, schema_id: str, data: dict) -> None:
     path2, _ = await rtc_create_file("test2.txt", "test2")
 
     try:
-        async with await rtc_connect_doc_client("text2", "file2", path2) as ws, WebsocketProvider(
-            doc.ydoc, ws
-        ):
+        websocket, room_name = await rtc_connect_doc_client("text2", "file2", path2)
+        async with websocket as ws, WebsocketProvider(doc.ydoc, Websocket(ws, room_name)):
             await event.wait()
             await sleep(0.1)
     except Exception:
         pass
 
     try:
-        async with await rtc_connect_doc_client("text2", "file2", path2) as ws, WebsocketProvider(
-            doc.ydoc, ws
-        ):
+        websocket, room_name = await rtc_connect_doc_client("text2", "file2", path2)
+        async with websocket as ws, WebsocketProvider(doc.ydoc, Websocket(ws, room_name)):
             await event.wait()
             await sleep(0.1)
     except Exception: