diff --git a/test_recv.py b/test_recv.py
index 0899097..efa04bf 100644
--- a/test_recv.py
+++ b/test_recv.py
@@ -11,8 +11,8 @@ srcRoomId = "srcRoom1"
 destRoomId = "destRoomId1"
 srcChannelIndex = 42
 destChannelIndex = 43
-def my_callback(npData, dataCount, sampleRate, numChannels, channelIndex):
-    print(f"dataCount:{dataCount}, sampleRate:{sampleRate}, numChannels:{numChannels}, channelIndex:{channelIndex}")
+def my_callback(npData, dataSize, dataCount, sampleRate, numChannels, channelIndex):
+    print(f"dataSize:{dataSize}, dataCount:{dataCount}, sampleRate:{sampleRate}, numChannels:{numChannels}, channelIndex:{channelIndex}")
 ret = rtc_plugins.init(destUserId, destDisplayName, destRoomId, my_callback)
 if ret != 0:
     print(f"init fail, ret:{ret}")