diff --git a/dtmgrpc/dtmgimp/dtmgimp.proto b/dtmgrpc/dtmgimp/dtmgimp.proto
index 71ea320..21a0d8e 100644
--- a/dtmgrpc/dtmgimp/dtmgimp.proto
+++ b/dtmgrpc/dtmgimp/dtmgimp.proto
@@ -35,9 +35,6 @@ message DtmGidReply {
   string Gid = 1;
 }
 
-message DtmBranchInfo {
-}
-
 message DtmBranchRequest {
   string Gid = 1;
   string TransType = 2;
diff --git a/test/tcc_test.go b/test/tcc_test.go
index b46af82..e0853ad 100644
--- a/test/tcc_test.go
+++ b/test/tcc_test.go
@@ -62,3 +62,18 @@ func TestTccTimeout(t *testing.T) {
 	assert.Equal(t, StatusFailed, getTransStatus(gid))
 	assert.Equal(t, []string{StatusSucceed, StatusPrepared}, getBranchesStatus(gid))
 }
+
+func TestTccCompatible(t *testing.T) {
+	req := examples.GenTransReq(30, false, false)
+	gid := dtmimp.GetFuncName()
+	err := dtmcli.TccGlobalTransaction(examples.DtmServer, gid, func(tcc *dtmcli.Tcc) (*resty.Response, error) {
+		_, err := tcc.CallBranch(req, Busi+"/TransOut", Busi+"/TransOutConfirm", Busi+"/TransOutRevert")
+		assert.Nil(t, err)
+		return tcc.CallBranch(req, Busi+"/TransIn", Busi+"/TransInConfirm", Busi+"/TransInRevert")
+	})
+	assert.Nil(t, err)
+	waitTransProcessed(gid)
+	assert.Equal(t, StatusSucceed, getTransStatus(gid))
+	assert.Equal(t, []string{StatusPrepared, StatusSucceed, StatusPrepared, StatusSucceed}, getBranchesStatus(gid))
+
+}