diff --git a/tests/agent/test_loop_direct_websocket_status.py b/tests/agent/test_loop_direct_websocket_status.py
index 2c8581e2a..dff6df803 100644
--- a/tests/agent/test_loop_direct_websocket_status.py
+++ b/tests/agent/test_loop_direct_websocket_status.py
@@ -1,8 +1,10 @@
+import asyncio
 from unittest.mock import AsyncMock, MagicMock
 
 import pytest
 
 from nanobot.agent.loop import AgentLoop
+from nanobot.bus.events import OutboundMessage
 from nanobot.bus.queue import MessageBus
 from nanobot.providers.base import GenerationSettings, LLMResponse
 
@@ -53,3 +55,37 @@ async def test_process_direct_websocket_clears_run_status(tmp_path) -> None:
     assert [status["goal_status"] for status in statuses] == ["running", "idle"]
     assert isinstance(statuses[0].get("started_at"), float)
     assert "started_at" not in statuses[1]
+
+
+@pytest.mark.asyncio
+async def test_process_direct_reuses_existing_session_lock(tmp_path) -> None:
+    loop = _make_loop(tmp_path)
+    loop._connect_mcp = AsyncMock()
+    session_key = "api:fixed"
+    lock = loop._session_locks.setdefault(session_key, asyncio.Lock())
+    await lock.acquire()
+    entered = asyncio.Event()
+
+    async def _process_message(msg, **_kwargs):
+        entered.set()
+        return OutboundMessage(channel=msg.channel, chat_id=msg.chat_id, content=msg.content)
+
+    loop._process_message = _process_message
+    task = asyncio.create_task(loop.process_direct("direct", session_key=session_key))
+    try:
+        await asyncio.sleep(0)
+        assert not entered.is_set()
+
+        lock.release()
+        response = await asyncio.wait_for(task, timeout=1.0)
+
+        assert entered.is_set()
+        assert response is not None
+        assert response.content == "direct"
+    finally:
+        if lock.locked():
+            lock.release()
+        if not task.done():
+            task.cancel()
+            with pytest.raises(asyncio.CancelledError):
+                await task