diff --git a/tests/benchmark/milvus_benchmark/metrics/models/metric.py b/tests/benchmark/milvus_benchmark/metrics/models/metric.py
index c55b3f1548..3fbe404bce 100644
--- a/tests/benchmark/milvus_benchmark/metrics/models/metric.py
+++ b/tests/benchmark/milvus_benchmark/metrics/models/metric.py
@@ -55,4 +55,5 @@ class Metric(object):
         self.metrics["value"].update(result)
 
     def update_message(self, err_message):
+        # If there is an error message in the test result, record the error message and report it
         self.err_message = err_message
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