diff --git a/tests/conftest.py b/tests/conftest.py
index 336ffdae..2681037b 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -4,6 +4,7 @@
 import pytest
 import ydb
 import time
+import subprocess
 
 
 @pytest.fixture(autouse=True, scope="session")
@@ -96,3 +97,21 @@ async def driver(endpoint, database, event_loop):
     yield driver
 
     await driver.stop(timeout=10)
+
+
+@pytest.fixture()
+def topic_path(endpoint) -> str:
+    subprocess.run(
+        """docker-compose exec -T ydb /ydb -e grpc://%s -d /local topic drop /local/test-topic"""
+        % endpoint,
+        shell=True,
+    )
+    res = subprocess.run(
+        """docker-compose exec -T ydb /ydb -e grpc://%s -d /local topic create /local/test-topic"""
+        % endpoint,
+        shell=True,
+        capture_output=True,
+    )
+    assert res.returncode == 0, res.stderr + res.stdout
+
+    return "/local/test-topic"
diff --git a/tests/topics/test_topic_writer.py b/tests/topics/test_topic_writer.py
new file mode 100644
index 00000000..3071c655
--- /dev/null
+++ b/tests/topics/test_topic_writer.py
@@ -0,0 +1,30 @@
+import pytest
+
+import ydb.aio
+
+
+@pytest.mark.asyncio
+class TestTopicWriterAsyncIO:
+    async def test_send_message(self, driver: ydb.aio.Driver, topic_path):
+        writer = driver.topic_client.topic_writer(
+            topic_path, producer_and_message_group_id="test"
+        )
+        writer.write(ydb.TopicWriterMessage(data="123".encode()))
+
+    async def test_wait_last_seqno(self, driver: ydb.aio.Driver, topic_path):
+        async with driver.topic_client.topic_writer(
+            topic_path,
+            producer_and_message_group_id="test",
+            auto_seqno=False,
+        ) as writer:
+            await writer.write_with_ack(
+                ydb.TopicWriterMessage(data="123".encode(), seqno=5)
+            )
+
+        async with driver.topic_client.topic_writer(
+            topic_path,
+            producer_and_message_group_id="test",
+            get_last_seqno=True,
+        ) as writer2:
+            init_info = await writer2.wait_init()
+            assert init_info.last_seqno == 5
diff --git a/ydb/_topic_writer/topic_writer.py b/ydb/_topic_writer/topic_writer.py
index da614bf2..ecc20e10 100644
--- a/ydb/_topic_writer/topic_writer.py
+++ b/ydb/_topic_writer/topic_writer.py
@@ -165,6 +165,9 @@ class Skipped:
         pass
 
 
+PublicWriteResultTypes = Union[PublicWriteResult.Written, PublicWriteResult.Skipped]
+
+
 class WriterSettings(PublicWriterSettings):
     def __init__(self, settings: PublicWriterSettings):
         self.__dict__ = settings.__dict__.copy()
diff --git a/ydb/_topic_writer/topic_writer_asyncio.py b/ydb/_topic_writer/topic_writer_asyncio.py
index b4373b17..61ab1e8c 100644
--- a/ydb/_topic_writer/topic_writer_asyncio.py
+++ b/ydb/_topic_writer/topic_writer_asyncio.py
@@ -1,6 +1,5 @@
 import asyncio
 import datetime
-import threading
 from collections import deque
 from typing import Deque, AsyncIterator, Union, List, Optional, Callable
 
@@ -9,13 +8,13 @@
     PublicWriterSettings,
     WriterSettings,
     Writer,
-    PublicWriteResult,
     PublicMessage,
     PublicWriterInitInfo,
     InternalMessage,
     TopicWriterStopped,
     TopicWriterError,
     messages_to_proto_requests,
+    PublicWriteResultTypes,
 )
 from .. import (
     _apis,
@@ -35,7 +34,7 @@
 class WriterAsyncIO:
     _loop: asyncio.AbstractEventLoop
     _reconnector: "WriterAsyncIOReconnector"
-    _lock: threading.Lock
+    _lock: asyncio.Lock
     _closed: bool
 
     @property
@@ -43,13 +42,14 @@ def last_seqno(self) -> int:
         raise NotImplementedError()
 
     def __init__(self, driver: SupportedDriverType, settings: PublicWriterSettings):
+        self._lock = asyncio.Lock()
         self._loop = asyncio.get_running_loop()
         self._closed = False
         self._reconnector = WriterAsyncIOReconnector(
             driver=driver, settings=WriterSettings(settings)
         )
 
-    async def __aenter__(self):
+    async def __aenter__(self) -> "WriterAsyncIO":
         return self
 
     async def __aexit__(self, exc_type, exc_val, exc_tb):
@@ -62,7 +62,7 @@ def __del__(self):
         self._loop.call_soon(self.close)
 
     async def close(self):
-        with self._lock:
+        async with self._lock:
             if self._closed:
                 return
             self._closed = True
@@ -73,7 +73,7 @@ async def write_with_ack(
         self,
         messages: Union[Writer.MessageType, List[Writer.MessageType]],
         *args: Optional[Writer.MessageType],
-    ) -> Union[PublicWriteResult, List[PublicWriteResult]]:
+    ) -> Union[PublicWriteResultTypes, List[PublicWriteResultTypes]]:
         """
         IT IS SLOWLY WAY. IT IS BAD CHOISE IN MOST CASES.
         It is recommended to use write with optionally flush or write_with_ack_futures and receive acks by wait futures.