diff --git a/dtmsvr/svr.go b/dtmsvr/svr.go
index f139b30..288bec2 100644
--- a/dtmsvr/svr.go
+++ b/dtmsvr/svr.go
@@ -106,7 +106,7 @@ func updateBranchAsync() {
 			select {
 			case updateBranch := <-updateBranchAsyncChan:
 				k := updateBranch.gid + updateBranch.branchID + "-" + updateBranch.op
-				if !exists[k] {
+				if !exists[k] { // postgres does not allow
 					exists[k] = true
 					updates = append(updates, TransBranch{
 						Gid:        updateBranch.gid,
@@ -119,7 +119,7 @@ func updateBranchAsync() {
 			case <-time.After(checkInterval):
 			}
 		}
-		for len(updates) > 0 {
+		for i := 0; i < 3 && len(updates) > 0; i++ {
 			rowAffected, err := GetStore().UpdateBranches(updates, []string{"status", "finish_time", "update_time"})
 
 			if err != nil {
diff --git a/test/workflow_grpc_test.go b/test/workflow_grpc_test.go
index 175535c..a75f844 100644
--- a/test/workflow_grpc_test.go
+++ b/test/workflow_grpc_test.go
@@ -68,43 +68,46 @@ func TestWorkflowGrpcRollback(t *testing.T) {
 
 func TestWorkflowMixed(t *testing.T) {
 	workflow.SetProtocolForTest(dtmimp.ProtocolHTTP)
-	req := &busi.ReqGrpc{Amount: 30}
 	gid := dtmimp.GetFuncName()
-	workflow.Register(gid, func(wf *workflow.Workflow, data []byte) error {
+	err := workflow.Register(gid, func(wf *workflow.Workflow, data []byte) error {
 		var req busi.ReqGrpc
 		dtmgimp.MustProtoUnmarshal(data, &req)
 
-		wf.NewBranch().OnRollback(func(bb *dtmcli.BranchBarrier) error {
+		_, err := wf.NewBranch().OnRollback(func(bb *dtmcli.BranchBarrier) error {
 			_, err := busi.BusiCli.TransOutRevertBSaga(wf.Context, &req)
 			return err
+		}).Do(func(bb *dtmcli.BranchBarrier) ([]byte, error) {
+			return nil, bb.CallWithDB(dbGet().ToSQLDB(), func(tx *sql.Tx) error {
+				return busi.SagaAdjustBalance(tx, busi.TransOutUID, int(-req.Amount), "")
+			})
 		})
-		_, err := busi.BusiCli.TransOutBSaga(wf.Context, &req)
 		if err != nil {
 			return err
 		}
 
+		req2 := &busi.ReqHTTP{Amount: int(req.Amount / 2)}
 		_, err = wf.NewBranch().OnCommit(func(bb *dtmcli.BranchBarrier) error {
-			_, err := busi.BusiCli.TransInConfirm(wf.Context, &req)
+			_, err := wf.NewRequest().SetBody(req2).Post(Busi + "/TccBTransInConfirm")
 			return err
 		}).OnRollback(func(bb *dtmcli.BranchBarrier) error {
-			req2 := &busi.ReqHTTP{Amount: 30}
-			_, err := wf.NewRequest().SetBody(req2).Post(Busi + "/TransInRevert")
+			_, err := wf.NewRequest().SetBody(req2).Post(Busi + "/TccBTransInCancel")
 			return err
-		}).Do(func(bb *dtmcli.BranchBarrier) ([]byte, error) {
-			err := busi.SagaAdjustBalance(dbGet().ToSQLDB(), busi.TransInUID, int(req.Amount), "")
-			return nil, err
-		})
+		}).NewRequest().SetBody(req2).Post(Busi + "/TccBTransInTry")
 		if err != nil {
 			return err
 		}
 		_, err = wf.NewBranch().DoXa(busi.BusiConf, func(db *sql.DB) ([]byte, error) {
-			return nil, busi.SagaAdjustBalance(db, busi.TransInUID, 0, dtmcli.ResultSuccess)
+			return nil, busi.SagaAdjustBalance(db, busi.TransInUID, int(req.Amount/2), dtmcli.ResultSuccess)
 		})
 		return err
 	})
-	err := workflow.Execute(gid, gid, dtmgimp.MustProtoMarshal(req))
+	assert.Nil(t, err)
+	before := getBeforeBalances("mysql")
+	req := &busi.ReqGrpc{Amount: 30}
+	err = workflow.Execute(gid, gid, dtmgimp.MustProtoMarshal(req))
 	assert.Nil(t, err)
 	assert.Equal(t, StatusSucceed, getTransStatus(gid))
+	assertNotSameBalance(t, before, "mysql")
 }
 
 func TestWorkflowGrpcError(t *testing.T) {