diff --git a/tests/python_client/chaos/README.md b/tests/python_client/chaos/README.md
index f7354a7015aea7660f0afa01ece7dd062f90c363..aa2ffe1ca3f4c0d9e8e12156496836ea8f668952 100644
--- a/tests/python_client/chaos/README.md
+++ b/tests/python_client/chaos/README.md
@@ -37,6 +37,9 @@ Please refer to [Run E2E Tests](https://github.com/milvus-io/milvus/blob/master/
 
 two direction(to and from) network isolation between a pod and the rest of the pods
 
+#### pod failure
+
+Set the pod（querynode, indexnode and datanode）as multiple replicas, make one of them failure, and test milvus's functionality
 ### Milvus in standalone mode
 1. standalone pod is killed