diff --git a/tests/benchmark/milvus_benchmark/config.py b/tests/benchmark/milvus_benchmark/config.py
index 323e319303..6d3f2b13f5 100644
--- a/tests/benchmark/milvus_benchmark/config.py
+++ b/tests/benchmark/milvus_benchmark/config.py
@@ -48,3 +48,5 @@ MINIO_PORT = 9000
 MINIO_ACCESS_KEY = "minioadmin"
 MINIO_SECRET_KEY = "minioadmin"
 MINIO_BUCKET_NAME = "test"
+
+COMMON_PRECISION = 4