diff --git a/dtmsvr/svr.go b/dtmsvr/svr.go
index 288bec2..46df9ba 100644
--- a/dtmsvr/svr.go
+++ b/dtmsvr/svr.go
@@ -22,6 +22,8 @@ import (
 	"github.com/dtm-labs/dtm/dtmutil"
 	"github.com/dtm-labs/dtmdriver"
 	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
 )
 
 // StartSvr StartSvr
@@ -56,7 +58,7 @@ func StartSvr() *gin.Engine {
 	// start grpc server
 	lis, err := net.Listen("tcp", fmt.Sprintf(":%d", conf.GrpcPort))
 	logger.FatalIfError(err)
-	s := grpc.NewServer(grpc.ChainUnaryInterceptor(grpcMetrics, dtmgimp.GrpcServerLog))
+	s := grpc.NewServer(grpc.ChainUnaryInterceptor(grpcRecover, grpcMetrics, dtmgimp.GrpcServerLog))
 	dtmgpb.RegisterDtmServer(s, &dtmServer{})
 	logger.Infof("grpc listening at %v", lis.Addr())
 	go func() {
@@ -136,3 +138,13 @@ func updateBranchAsync() {
 		flushBranchs()
 	}
 }
+
+func grpcRecover(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (res interface{}, rerr error) {
+	defer func() {
+		if x := recover(); x != nil {
+			rerr = status.Errorf(codes.Internal, "%v", x)
+		}
+	}()
+	res, rerr = handler(ctx, req)
+	return
+}
diff --git a/test/workflow_grpc_test.go b/test/workflow_grpc_test.go
index a75f844..726f83b 100644
--- a/test/workflow_grpc_test.go
+++ b/test/workflow_grpc_test.go
@@ -19,7 +19,7 @@ import (
 )
 
 func TestWorkflowGrpcSimple(t *testing.T) {
-	workflow.SetProtocolForTest(dtmimp.ProtocolHTTP)
+	workflow.SetProtocolForTest(dtmimp.ProtocolGRPC)
 	req := &busi.ReqGrpc{Amount: 30, TransInResult: "FAILURE"}
 	gid := dtmimp.GetFuncName()
 	workflow.Register(gid, func(wf *workflow.Workflow, data []byte) error {
@@ -33,7 +33,7 @@ func TestWorkflowGrpcSimple(t *testing.T) {
 		return err
 	})
 	err := workflow.Execute(gid, gid, dtmgimp.MustProtoMarshal(req))
-	assert.Error(t, err, dtmcli.ErrFailure)
+	assert.Error(t, err)
 	assert.Equal(t, StatusFailed, getTransStatus(gid))
 }