diff --git a/server/apiv2/handlers/tso_keyspace_group.go b/server/apiv2/handlers/tso_keyspace_group.go
index a9f042687f6..835bda9d7bb 100644
--- a/server/apiv2/handlers/tso_keyspace_group.go
+++ b/server/apiv2/handlers/tso_keyspace_group.go
@@ -453,11 +453,6 @@ func SetNodesForKeyspaceGroup(c *gin.Context) {
 		c.AbortWithStatusJSON(http.StatusBadRequest, "keyspace group does not exist")
 		return
 	}
-	// check if nodes is less than default replica count
-	if len(setParams.Nodes) < utils.DefaultKeyspaceGroupReplicaCount {
-		c.AbortWithStatusJSON(http.StatusBadRequest, "invalid num of nodes")
-		return
-	}
 	// check if node exists
 	for _, node := range setParams.Nodes {
 		if !manager.IsExistNode(node) {
diff --git a/tests/integrations/mcs/keyspace/tso_keyspace_group_test.go b/tests/integrations/mcs/keyspace/tso_keyspace_group_test.go
index 160eea167d6..78431eb72c6 100644
--- a/tests/integrations/mcs/keyspace/tso_keyspace_group_test.go
+++ b/tests/integrations/mcs/keyspace/tso_keyspace_group_test.go
@@ -298,7 +298,7 @@ func (suite *keyspaceGroupTestSuite) TestSetNodes() {
 		Nodes: []string{nodesList[0]},
 	}
 	_, code = suite.trySetNodesForKeyspaceGroup(re, id, params)
-	re.Equal(http.StatusBadRequest, code)
+	re.Equal(http.StatusOK, code)
 
 	// the keyspace group is not exist.
 	id = 2
diff --git a/tools/pd-ctl/tests/keyspace/keyspace_group_test.go b/tools/pd-ctl/tests/keyspace/keyspace_group_test.go
index 87fd17a97d4..1e3763d5d6e 100644
--- a/tools/pd-ctl/tests/keyspace/keyspace_group_test.go
+++ b/tools/pd-ctl/tests/keyspace/keyspace_group_test.go
@@ -263,7 +263,7 @@ func TestSetNodeAndPriorityKeyspaceGroup(t *testing.T) {
 	args := []string{"-u", pdAddr, "keyspace-group", "set-node", defaultKeyspaceGroupID, tsoAddrs[0]}
 	output, err := tests.ExecuteCommand(cmd, args...)
 	re.NoError(err)
-	re.Contains(string(output), "invalid num of nodes")
+	re.Contains(string(output), "Success!")
 	args = []string{"-u", pdAddr, "keyspace-group", "set-node", defaultKeyspaceGroupID, "", ""}
 	output, err = tests.ExecuteCommand(cmd, args...)
 	re.NoError(err)