diff --git a/go/pserver/optimizer.go b/go/pserver/optimizer.go
index 4ecae0911c2d1bbbc5258ab48d4140e52d9156ca..af7faad25495bd200e979485e4ca6a8b4170e0fd 100644
--- a/go/pserver/optimizer.go
+++ b/go/pserver/optimizer.go
@@ -47,7 +47,7 @@ func newOptimizer(paramWithConfigs ParameterWithConfig) *optimizer {
 }
 
 func (o *optimizer) GetWeights(p *Parameter) error {
-
+	// FIXME: get weigths from optimizer has bug
 	var buffer unsafe.Pointer
 	buffer_len := C.paddle_optimizer_get_weights(o.opt, &buffer)
 	if buffer_len == 0 || buffer == nullPtr {
@@ -59,7 +59,7 @@ func (o *optimizer) GetWeights(p *Parameter) error {
 
 func (o *optimizer) UpdateParameter(g Gradient) error {
 	if o.ElementType != g.ElementType {
-		return fmt.Errorf("Name: %s, parameter and gradient element type not match, parameter: %v, gradient: %v", g.Name, g.ElementType, g.ElementType)
+		return fmt.Errorf("Name: %s, parameter and gradient element type not match, parameter: %v, gradient: %v", g.Name, o.ElementType, g.ElementType)
 	}
 
 	// FIXME: do we need a copy? discard g.Content by GC ok
diff --git a/go/pserver/service_test.go b/go/pserver/service_test.go
index a88e2df73adaafe2ac71a178ca7ecba4cb24e9b3..a09b25dec0866f55efaadd75fdbf3d727c0f6d4e 100644
--- a/go/pserver/service_test.go
+++ b/go/pserver/service_test.go
@@ -2,6 +2,7 @@ package pserver_test
 
 import (
 	"io/ioutil"
+	"reflect"
 	"sync"
 	"testing"
 	"time"
@@ -9,7 +10,7 @@ import (
 	"github.com/PaddlePaddle/Paddle/go/pserver"
 )
 
-func TestFull(t *testing.T) {
+func TestNewName(t *testing.T) {
 	s := pserver.NewService()
 	var p pserver.Parameter
 	p.Name = "param_a"
@@ -25,69 +26,69 @@ func TestFull(t *testing.T) {
 		t.FailNow()
 	}
 
-	// 	var p1 pserver.Parameter
-	// 	p1.Name = "param_b"
-	// 	p1.Content = []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
-	// 	p1.ElementType = pserver.Float32
-	// 	fmt.Println("paddle passed")
-	// 	err = s.InitParam(pserver.ParameterWithConfig{Param: p1, Config: config}, nil)
-	// 	if err != nil {
-	// 		t.FailNow()
-	// 	}
-
-	// 	err = s.FinishInitParams(0, nil)
-	// 	if err != nil {
-	// 		t.FailNow()
-	// 	}
-
-	// 	var param pserver.Parameter
-	// 	err = s.GetParam("param_b", &param)
-	// 	if err != nil {
-	// 		t.FailNow()
-	// 	}
-
-	// 	if !reflect.DeepEqual(param, p1) {
-	// 		t.FailNow()
-	// 	}
-
-	// 	g1, g2 := pserver.Gradient(p1), pserver.Gradient(p)
-	// 	err = s.SendGrad(g1, nil)
-	// 	if err != nil {
-	// 		t.FailNow()
-	// 	}
-	// 	err = s.SendGrad(g2, nil)
-
-	// 	if err != nil {
-	// 		t.FailNow()
-	// 	}
-
-	// 	var param1 pserver.Parameter
-	// 	err = s.GetParam("param_a", &param1)
-	// 	if err != nil {
-	// 		t.FailNow()
-	// 	}
-
-	// 	// don't compare content, since it's already changed by
-	// 	// gradient update.
-	// 	param1.Content = nil
-	// 	p.Content = nil
-
-	// 	if !reflect.DeepEqual(param1, p) {
-	// 		t.FailNow()
-	// 	}
-	// }
-
-	// func TestMultipleInit(t *testing.T) {
-	// 	s := pserver.NewService()
-	// 	err := s.FinishInitParams(0, nil)
-	// 	if err != nil {
-	// 		t.FailNow()
-	// 	}
-
-	// 	err = s.FinishInitParams(0, nil)
-	// 	if err.Error() != pserver.AlreadyInitialized {
-	// 		t.FailNow()
-	// 	}
+	var p1 pserver.Parameter
+	p1.Name = "param_b"
+	p1.Content = []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
+	p1.ElementType = pserver.Float32
+	err = s.InitParam(pserver.ParameterWithConfig{Param: p1, Config: config}, nil)
+	if err != nil {
+		t.FailNow()
+	}
+
+	err = s.FinishInitParams(0, nil)
+	if err != nil {
+		t.FailNow()
+	}
+
+	var param pserver.Parameter
+	err = s.GetParam("param_b", &param)
+	if err != nil {
+		t.FailNow()
+	}
+
+	if !reflect.DeepEqual(param, p1) {
+		t.FailNow()
+	}
+
+	g1, g2 := pserver.Gradient(p1), pserver.Gradient(p)
+
+	err = s.SendGrad(g1, nil)
+	if err != nil {
+		t.FailNow()
+	}
+	err = s.SendGrad(g2, nil)
+
+	if err != nil {
+		t.FailNow()
+	}
+
+	var param1 pserver.Parameter
+	err = s.GetParam("param_a", &param1)
+	if err != nil {
+		t.FailNow()
+	}
+
+	// don't compare content, since it's already changed by
+	// gradient update.
+	param1.Content = nil
+	p.Content = nil
+
+	if !reflect.DeepEqual(param1, p) {
+		t.FailNow()
+	}
+}
+
+func TestMultipleInit(t *testing.T) {
+	s := pserver.NewService()
+	err := s.FinishInitParams(0, nil)
+	if err != nil {
+		t.FailNow()
+	}
+
+	err = s.FinishInitParams(0, nil)
+	if err.Error() != pserver.AlreadyInitialized {
+		t.FailNow()
+	}
 }
 
 func TestUninitialized(t *testing.T) {