diff --git a/transport/grpc/server_test.go b/transport/grpc/server_test.go
index 14079ce4b4c..29f0b2246b4 100644
--- a/transport/grpc/server_test.go
+++ b/transport/grpc/server_test.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"crypto/tls"
 	"fmt"
+	"net"
 	"net/url"
 	"strings"
 	"testing"
@@ -214,3 +215,10 @@ func TestServer_unaryServerInterceptor(t *testing.T) {
 	assert.NoError(t, err)
 	assert.Equal(t, "hi", rv.(*testResp).Data)
 }
+
+func TestListener(t *testing.T) {
+	lis := &net.TCPListener{}
+	s := &Server{}
+	Listener(lis)(s)
+	assert.Equal(t, s.lis, lis)
+}
diff --git a/transport/http/client_test.go b/transport/http/client_test.go
index dd5af2395e3..2da84f75fdc 100644
--- a/transport/http/client_test.go
+++ b/transport/http/client_test.go
@@ -5,12 +5,14 @@ import (
 	"context"
 	"crypto/tls"
 	"encoding/json"
+	"fmt"
 	"io"
 	nethttp "net/http"
+	"strconv"
 	"testing"
 	"time"
 
-	"github.com/go-kratos/kratos/v2/errors"
+	kratosErrors "github.com/go-kratos/kratos/v2/errors"
 	"github.com/go-kratos/kratos/v2/middleware"
 	"github.com/go-kratos/kratos/v2/registry"
 	"github.com/stretchr/testify/assert"
@@ -116,8 +118,16 @@ func (*mockDiscovery) Watch(ctx context.Context, serviceName string) (registry.W
 
 type mockWatcher struct{}
 
-func (*mockWatcher) Next() ([]*registry.ServiceInstance, error) {
-	return nil, nil
+func (m *mockWatcher) Next() ([]*registry.ServiceInstance, error) {
+	instance := &registry.ServiceInstance{
+		ID:        "1",
+		Name:      "kratos",
+		Version:   "v1",
+		Metadata:  map[string]string{},
+		Endpoints: []string{fmt.Sprintf("http://127.0.0.1:9001?isSecure=%s", strconv.FormatBool(false))},
+	}
+	time.Sleep(time.Millisecond * 500)
+	return []*registry.ServiceInstance{instance}, nil
 }
 
 func (*mockWatcher) Stop() error {
@@ -202,9 +212,9 @@ func TestDefaultErrorDecoder(t *testing.T) {
 	}
 	err2 := DefaultErrorDecoder(context.TODO(), resp2)
 	assert.Error(t, err2)
-	assert.Equal(t, int32(500), err2.(*errors.Error).GetCode())
-	assert.Equal(t, "hi", err2.(*errors.Error).GetMessage())
-	assert.Equal(t, "FOO", err2.(*errors.Error).GetReason())
+	assert.Equal(t, int32(500), err2.(*kratosErrors.Error).GetCode())
+	assert.Equal(t, "hi", err2.(*kratosErrors.Error).GetMessage())
+	assert.Equal(t, "FOO", err2.(*kratosErrors.Error).GetReason())
 }
 
 func TestCodecForResponse(t *testing.T) {
diff --git a/transport/http/server_test.go b/transport/http/server_test.go
index b5238bb061e..f41dc042c41 100644
--- a/transport/http/server_test.go
+++ b/transport/http/server_test.go
@@ -6,6 +6,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"net"
 	"net/http"
 	"strings"
 	"testing"
@@ -236,3 +237,10 @@ func TestTLSConfig(t *testing.T) {
 	TLSConfig(v)(o)
 	assert.Equal(t, v, o.tlsConf)
 }
+
+func TestListener(t *testing.T) {
+	lis := &net.TCPListener{}
+	s := &Server{}
+	Listener(lis)(s)
+	assert.Equal(t, s.lis, lis)
+}