diff --git a/test/unit/agents/test_vad_streaming.py b/test/unit/agents/test_vad_streaming.py
index 8a0e072..47e8332 100644
--- a/test/unit/agents/test_vad_streaming.py
+++ b/test/unit/agents/test_vad_streaming.py
@@ -53,6 +53,12 @@ def patch_settings(monkeypatch):
 
 
 async def simulate_streaming_with_probabilities(streaming, probabilities: list[float]):
+    """
+    Simulates a streaming scenario with given VAD model probabilities for testing purposes.
+
+    :param streaming: The streaming component to be tested.
+    :param probabilities: A list of probabilities representing the outputs of the VAD model.
+    """
     model_item = MagicMock()
     model_item.item.side_effect = probabilities
     streaming.model = MagicMock()