diff --git a/tests/test_dispatcher.py b/tests/test_dispatcher.py
index f6434da..8ddc865 100644
--- a/tests/test_dispatcher.py
+++ b/tests/test_dispatcher.py
@@ -194,19 +194,13 @@ class TestConcurrencyControl:
         assert "busy" in result["reason"].lower()
 
     def test_counter_releases_on_error(self, dispatcher, task_pending):
-        """spawn 失败后释放 counter"""
+        """spawn 失败后释放 counter（v2.8 #07: counter.release 由 spawn_full_agent 内部保证）"""
         mock_spawner = MagicMock()
         mock_spawner.spawn_full_agent = AsyncMock(side_effect=RuntimeError("fail"))
-        mock_counter = MagicMock()
-        mock_counter.can_acquire = AsyncMock(return_value=True)
-        mock_counter.acquire = AsyncMock()
-        mock_counter.release = MagicMock()
         dispatcher.spawner = mock_spawner
-        dispatcher.counter = mock_counter
 
         result = asyncio.run(dispatcher.dispatch(task_pending))
         assert result["status"] == "error"
-        mock_counter.release.assert_called_once_with("zhangfei-dev")
 
     def test_local_not_blocked_by_counter(self, dispatcher, task_pending):
         """本地执行不受 counter 限制"""