diff --git a/src/test/java/org/opensearch/security/test/helper/cluster/ClusterHelper.java b/src/test/java/org/opensearch/security/test/helper/cluster/ClusterHelper.java
index 1ebd46cec6..da1eb2b779 100644
--- a/src/test/java/org/opensearch/security/test/helper/cluster/ClusterHelper.java
+++ b/src/test/java/org/opensearch/security/test/helper/cluster/ClusterHelper.java
@@ -366,7 +366,7 @@ private Settings.Builder getMinimumNonSecurityNodeSettingsBuilder(final int node
                 .put("path.logs", "./target/data/"+clustername+"/logs")
                 .put("node.max_local_storage_nodes", nodeCount)
                 //.put("discovery.zen.minimum_master_nodes", minMasterNodes(masterTcpPorts.size()))
-                .putList("cluster.initial_master_nodes", masterTcpPorts.stream().map(s->"127.0.0.1:"+s).collect(Collectors.toList()))
+                .putList("cluster.initial_cluster_manager_nodes", masterTcpPorts.stream().map(s->"127.0.0.1:"+s).collect(Collectors.toList()))
                 //.put("discovery.zen.no_master_block", "all")
                 //.put("discovery.zen.fd.ping_timeout", "5s")
                 .put("discovery.initial_state_timeout","8s")
diff --git a/tools/install_demo_configuration.sh b/tools/install_demo_configuration.sh
index 88578537de..2eb0c2fbf2 100755
--- a/tools/install_demo_configuration.sh
+++ b/tools/install_demo_configuration.sh
@@ -382,7 +382,7 @@ else
 	if [ "$cluster_mode" == 1 ]; then
         echo "network.host: 0.0.0.0" | $SUDO_CMD tee -a "$OPENSEARCH_CONF_FILE" > /dev/null
         echo "node.name: smoketestnode" | $SUDO_CMD tee -a "$OPENSEARCH_CONF_FILE" > /dev/null
-        echo "cluster.initial_master_nodes: smoketestnode" | $SUDO_CMD tee -a "$OPENSEARCH_CONF_FILE" > /dev/null
+        echo "cluster.initial_cluster_manager_nodes: smoketestnode" | $SUDO_CMD tee -a "$OPENSEARCH_CONF_FILE" > /dev/null
     fi
 fi