diff --git a/protocol/dubbo/client_test.go b/protocol/dubbo/client_test.go
index 744ffa80d6..8b0ba169b8 100644
--- a/protocol/dubbo/client_test.go
+++ b/protocol/dubbo/client_test.go
@@ -37,7 +37,13 @@ import (
 	"github.com/apache/dubbo-go/protocol"
 )
 
-func TestClient_CallOneway(t *testing.T) {
+const (
+	mockMethodNameGetUser   = "GetUser"
+	mockMethodNameGetBigPkg = "GetBigPkg"
+	mockAddress             = "127.0.0.1:20000"
+)
+
+func TestClientCallOneway(t *testing.T) {
 	proto, url := InitTest(t)
 
 	c := &Client{
@@ -50,15 +56,14 @@ func TestClient_CallOneway(t *testing.T) {
 	}
 	c.pool = newGettyRPCClientConnPool(c, clientConf.PoolSize, time.Duration(int(time.Second)*clientConf.PoolTTL))
 
-	//user := &User{}
-	err := c.CallOneway(NewRequest("127.0.0.1:20000", url, "GetUser", []interface{}{"1", "username"}, nil))
+	err := c.CallOneway(NewRequest(mockAddress, url, mockMethodNameGetUser, []interface{}{"1", "username"}, nil))
 	assert.NoError(t, err)
 
 	// destroy
 	proto.Destroy()
 }
 
-func TestClient_Call(t *testing.T) {
+func TestClientCall(t *testing.T) {
 	proto, url := InitTest(t)
 
 	c := &Client{
@@ -77,50 +82,50 @@ func TestClient_Call(t *testing.T) {
 	)
 
 	user = &User{}
-	err = c.Call(NewRequest("127.0.0.1:20000", url, "GetBigPkg", []interface{}{nil}, nil), NewResponse(user, nil))
+	err = c.Call(NewRequest(mockAddress, url, mockMethodNameGetBigPkg, []interface{}{nil}, nil), NewResponse(user, nil))
 	assert.NoError(t, err)
 	assert.NotEqual(t, "", user.Id)
 	assert.NotEqual(t, "", user.Name)
 
 	user = &User{}
-	err = c.Call(NewRequest("127.0.0.1:20000", url, "GetUser", []interface{}{"1", "username"}, nil), NewResponse(user, nil))
+	err = c.Call(NewRequest(mockAddress, url, mockMethodNameGetUser, []interface{}{"1", "username"}, nil), NewResponse(user, nil))
 	assert.NoError(t, err)
 	assert.Equal(t, User{Id: "1", Name: "username"}, *user)
 
 	user = &User{}
-	err = c.Call(NewRequest("127.0.0.1:20000", url, "GetUser0", []interface{}{"1", nil, "username"}, nil), NewResponse(user, nil))
+	err = c.Call(NewRequest(mockAddress, url, "GetUser0", []interface{}{"1", nil, "username"}, nil), NewResponse(user, nil))
 	assert.NoError(t, err)
 	assert.Equal(t, User{Id: "1", Name: "username"}, *user)
 
-	err = c.Call(NewRequest("127.0.0.1:20000", url, "GetUser1", []interface{}{}, nil), NewResponse(user, nil))
+	err = c.Call(NewRequest(mockAddress, url, "GetUser1", []interface{}{}, nil), NewResponse(user, nil))
 	assert.NoError(t, err)
 
-	err = c.Call(NewRequest("127.0.0.1:20000", url, "GetUser2", []interface{}{}, nil), NewResponse(user, nil))
+	err = c.Call(NewRequest(mockAddress, url, "GetUser2", []interface{}{}, nil), NewResponse(user, nil))
 	assert.EqualError(t, err, "error")
 
 	user2 := []interface{}{}
-	err = c.Call(NewRequest("127.0.0.1:20000", url, "GetUser3", []interface{}{}, nil), NewResponse(&user2, nil))
+	err = c.Call(NewRequest(mockAddress, url, "GetUser3", []interface{}{}, nil), NewResponse(&user2, nil))
 	assert.NoError(t, err)
 	assert.Equal(t, &User{Id: "1", Name: "username"}, user2[0])
 
 	user2 = []interface{}{}
-	err = c.Call(NewRequest("127.0.0.1:20000", url, "GetUser4", []interface{}{[]interface{}{"1", "username"}}, nil), NewResponse(&user2, nil))
+	err = c.Call(NewRequest(mockAddress, url, "GetUser4", []interface{}{[]interface{}{"1", "username"}}, nil), NewResponse(&user2, nil))
 	assert.NoError(t, err)
 	assert.Equal(t, &User{Id: "1", Name: "username"}, user2[0])
 
 	user3 := map[interface{}]interface{}{}
-	err = c.Call(NewRequest("127.0.0.1:20000", url, "GetUser5", []interface{}{map[interface{}]interface{}{"id": "1", "name": "username"}}, nil), NewResponse(&user3, nil))
+	err = c.Call(NewRequest(mockAddress, url, "GetUser5", []interface{}{map[interface{}]interface{}{"id": "1", "name": "username"}}, nil), NewResponse(&user3, nil))
 	assert.NoError(t, err)
 	assert.NotNil(t, user3)
 	assert.Equal(t, &User{Id: "1", Name: "username"}, user3["key"])
 
 	user = &User{}
-	err = c.Call(NewRequest("127.0.0.1:20000", url, "GetUser6", []interface{}{0}, nil), NewResponse(user, nil))
+	err = c.Call(NewRequest(mockAddress, url, "GetUser6", []interface{}{0}, nil), NewResponse(user, nil))
 	assert.NoError(t, err)
 	assert.Equal(t, User{Id: "", Name: ""}, *user)
 
 	user = &User{}
-	err = c.Call(NewRequest("127.0.0.1:20000", url, "GetUser6", []interface{}{1}, nil), NewResponse(user, nil))
+	err = c.Call(NewRequest(mockAddress, url, "GetUser6", []interface{}{1}, nil), NewResponse(user, nil))
 	assert.NoError(t, err)
 	assert.Equal(t, User{Id: "1", Name: ""}, *user)
 
@@ -128,7 +133,7 @@ func TestClient_Call(t *testing.T) {
 	proto.Destroy()
 }
 
-func TestClient_AsyncCall(t *testing.T) {
+func TestClientAsyncCall(t *testing.T) {
 	proto, url := InitTest(t)
 
 	c := &Client{
@@ -144,7 +149,7 @@ func TestClient_AsyncCall(t *testing.T) {
 	user := &User{}
 	lock := sync.Mutex{}
 	lock.Lock()
-	err := c.AsyncCall(NewRequest("127.0.0.1:20000", url, "GetUser", []interface{}{"1", "username"}, nil), func(response common.CallbackResponse) {
+	err := c.AsyncCall(NewRequest(mockAddress, url, mockMethodNameGetUser, []interface{}{"1", "username"}, nil), func(response common.CallbackResponse) {
 		r := response.(AsyncCallbackResponse)
 		assert.Equal(t, User{Id: "1", Name: "username"}, *r.Reply.(*Response).reply.(*User))
 		lock.Unlock()
diff --git a/protocol/dubbo/codec_test.go b/protocol/dubbo/codec_test.go
index 5dc71f0d08..c2ca443637 100644
--- a/protocol/dubbo/codec_test.go
+++ b/protocol/dubbo/codec_test.go
@@ -29,7 +29,7 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func TestDubboPackage_MarshalAndUnmarshal(t *testing.T) {
+func TestDubboPackageMarshalAndUnmarshal(t *testing.T) {
 	pkg := &DubboPackage{}
 	pkg.Body = []interface{}{"a"}
 	pkg.Header.Type = hessian.PackageHeartbeat
diff --git a/protocol/dubbo/dubbo_invoker_test.go b/protocol/dubbo/dubbo_invoker_test.go
index 1a64301f82..c0640d5558 100644
--- a/protocol/dubbo/dubbo_invoker_test.go
+++ b/protocol/dubbo/dubbo_invoker_test.go
@@ -35,7 +35,7 @@ import (
 	"github.com/apache/dubbo-go/protocol/invocation"
 )
 
-func TestDubboInvoker_Invoke(t *testing.T) {
+func TestDubboInvokerInvoke(t *testing.T) {
 	proto, url := InitTest(t)
 
 	c := &Client{
@@ -51,7 +51,7 @@ func TestDubboInvoker_Invoke(t *testing.T) {
 	invoker := NewDubboInvoker(url, c)
 	user := &User{}
 
-	inv := invocation.NewRPCInvocationWithOptions(invocation.WithMethodName("GetUser"), invocation.WithArguments([]interface{}{"1", "username"}),
+	inv := invocation.NewRPCInvocationWithOptions(invocation.WithMethodName(mockMethodNameGetUser), invocation.WithArguments([]interface{}{"1", "username"}),
 		invocation.WithReply(user), invocation.WithAttachments(map[string]string{"test_key": "test_value"}))
 
 	// Call
diff --git a/protocol/dubbo/dubbo_protocol_test.go b/protocol/dubbo/dubbo_protocol_test.go
index 14f6868ad4..6f3892be67 100644
--- a/protocol/dubbo/dubbo_protocol_test.go
+++ b/protocol/dubbo/dubbo_protocol_test.go
@@ -31,15 +31,19 @@ import (
 	"github.com/apache/dubbo-go/protocol"
 )
 
-func TestDubboProtocol_Export(t *testing.T) {
-	// Export
-	proto := GetProtocol()
-	srvConf = &ServerConfig{}
-	url, err := common.NewURL("dubbo://127.0.0.1:20000/com.ikurento.user.UserProvider?anyhost=true&" +
+const (
+	mockCommonUrl = "dubbo://127.0.0.1:20000/com.ikurento.user.UserProvider?anyhost=true&" +
 		"application=BDTService&category=providers&default.timeout=10000&dubbo=dubbo-provider-golang-1.0.0&" +
 		"environment=dev&interface=com.ikurento.user.UserProvider&ip=192.168.56.1&methods=GetUser%2C&" +
 		"module=dubbogo+user-info+server&org=ikurento.com&owner=ZX&pid=1447&revision=0.0.1&" +
-		"side=provider&timeout=3000&timestamp=1556509797245")
+		"side=provider&timeout=3000&timestamp=1556509797245"
+)
+
+func TestDubboProtocolExport(t *testing.T) {
+	// Export
+	proto := GetProtocol()
+	srvConf = &ServerConfig{}
+	url, err := common.NewURL(mockCommonUrl)
 	assert.NoError(t, err)
 	exporter := proto.Export(protocol.NewBaseInvoker(url))
 
@@ -48,11 +52,7 @@ func TestDubboProtocol_Export(t *testing.T) {
 	assert.True(t, eq)
 
 	// second service: the same path and the different version
-	url2, err := common.NewURL("dubbo://127.0.0.1:20000/com.ikurento.user.UserProvider?anyhost=true&"+
-		"application=BDTService&category=providers&default.timeout=10000&dubbo=dubbo-provider-golang-1.0.0&"+
-		"environment=dev&interface=com.ikurento.user.UserProvider&ip=192.168.56.1&methods=GetUser%2C&"+
-		"module=dubbogo+user-info+server&org=ikurento.com&owner=ZX&pid=1447&revision=0.0.1&"+
-		"side=provider&timeout=3000&timestamp=1556509797245", common.WithParamsValue(constant.VERSION_KEY, "v1.1"))
+	url2, err := common.NewURL(mockCommonUrl, common.WithParamsValue(constant.VERSION_KEY, "v1.1"))
 	assert.NoError(t, err)
 	exporter2 := proto.Export(protocol.NewBaseInvoker(url2))
 	// make sure url
@@ -74,14 +74,10 @@ func TestDubboProtocol_Export(t *testing.T) {
 	assert.False(t, ok)
 }
 
-func TestDubboProtocol_Refer(t *testing.T) {
+func TestDubboProtocolRefer(t *testing.T) {
 	// Refer
 	proto := GetProtocol()
-	url, err := common.NewURL("dubbo://127.0.0.1:20000/com.ikurento.user.UserProvider?anyhost=true&" +
-		"application=BDTService&category=providers&default.timeout=10000&dubbo=dubbo-provider-golang-1.0.0&" +
-		"environment=dev&interface=com.ikurento.user.UserProvider&ip=192.168.56.1&methods=GetUser%2C&" +
-		"module=dubbogo+user-info+server&org=ikurento.com&owner=ZX&pid=1447&revision=0.0.1&" +
-		"side=provider&timeout=3000&timestamp=1556509797245")
+	url, err := common.NewURL(mockCommonUrl)
 	assert.NoError(t, err)
 	clientConf = &ClientConfig{}
 	invoker := proto.Refer(url)
diff --git a/protocol/grpc/common_test.go b/protocol/grpc/common_test.go
index 33c2fc617d..b732283a9b 100644
--- a/protocol/grpc/common_test.go
+++ b/protocol/grpc/common_test.go
@@ -106,7 +106,7 @@ func dubboGreeterSayHelloHandler(srv interface{}, ctx context.Context,
 		Server:     srv,
 		FullMethod: "/helloworld.Greeter/SayHello",
 	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+	handler := func(context.Context, interface{}) (interface{}, error) {
 		result := base.GetProxyImpl().Invoke(context.Background(), invo)
 		return result.Result(), result.Error()
 	}
diff --git a/protocol/grpc/grpc_invoker_test.go b/protocol/grpc/grpc_invoker_test.go
index 3054ada133..d5ebbb4f47 100644
--- a/protocol/grpc/grpc_invoker_test.go
+++ b/protocol/grpc/grpc_invoker_test.go
@@ -33,11 +33,19 @@ import (
 	"github.com/apache/dubbo-go/protocol/invocation"
 )
 
+const (
+	mockGrpcCommonUrl = "grpc://127.0.0.1:30000/GrpcGreeterImpl?accesslog=&anyhost=true&app.version=0.0.1&application=BDTService&async=false&bean.name=GrpcGreeterImpl" +
+		"&category=providers&cluster=failover&dubbo=dubbo-provider-golang-2.6.0&environment=dev&execute.limit=&execute.limit.rejected.handler=&generic=false&group=&interface=io.grpc.examples.helloworld.GreeterGrpc%24IGreeter" +
+		"&ip=192.168.1.106&loadbalance=random&methods.SayHello.loadbalance=random&methods.SayHello.retries=1&methods.SayHello.tps.limit.interval=&methods.SayHello.tps.limit.rate=&methods.SayHello.tps.limit.strategy=" +
+		"&methods.SayHello.weight=0&module=dubbogo+say-hello+client&name=BDTService&organization=ikurento.com&owner=ZX&pid=49427&reference.filter=cshutdown&registry.role=3&remote.timestamp=1576923717&retries=" +
+		"&service.filter=echo%2Ctoken%2Caccesslog%2Ctps%2Cexecute%2Cpshutdown&side=provider&timestamp=1576923740&tps.limit.interval=&tps.limit.rate=&tps.limit.rejected.handler=&tps.limit.strategy=&tps.limiter=&version=&warmup=100!"
+)
+
 func TestInvoke(t *testing.T) {
 	go internal.InitGrpcServer()
 	defer internal.ShutdownGrpcServer()
 
-	url, err := common.NewURL("grpc://127.0.0.1:30000/GrpcGreeterImpl?accesslog=&anyhost=true&app.version=0.0.1&application=BDTService&async=false&bean.name=GrpcGreeterImpl&category=providers&cluster=failover&dubbo=dubbo-provider-golang-2.6.0&environment=dev&execute.limit=&execute.limit.rejected.handler=&generic=false&group=&interface=io.grpc.examples.helloworld.GreeterGrpc%24IGreeter&ip=192.168.1.106&loadbalance=random&methods.SayHello.loadbalance=random&methods.SayHello.retries=1&methods.SayHello.tps.limit.interval=&methods.SayHello.tps.limit.rate=&methods.SayHello.tps.limit.strategy=&methods.SayHello.weight=0&module=dubbogo+say-hello+client&name=BDTService&organization=ikurento.com&owner=ZX&pid=49427&reference.filter=cshutdown&registry.role=3&remote.timestamp=1576923717&retries=&service.filter=echo%2Ctoken%2Caccesslog%2Ctps%2Cexecute%2Cpshutdown&side=provider&timestamp=1576923740&tps.limit.interval=&tps.limit.rate=&tps.limit.rejected.handler=&tps.limit.strategy=&tps.limiter=&version=&warmup=100!")
+	url, err := common.NewURL(mockGrpcCommonUrl)
 	assert.Nil(t, err)
 
 	cli := NewClient(url)
diff --git a/protocol/grpc/grpc_protocol_test.go b/protocol/grpc/grpc_protocol_test.go
index d028f8ef42..87ce714fc7 100644
--- a/protocol/grpc/grpc_protocol_test.go
+++ b/protocol/grpc/grpc_protocol_test.go
@@ -32,12 +32,12 @@ import (
 	"github.com/apache/dubbo-go/protocol/grpc/internal"
 )
 
-func TestGrpcProtocol_Export(t *testing.T) {
+func TestGrpcProtocolExport(t *testing.T) {
 	// Export
 	addService()
 
 	proto := GetProtocol()
-	url, err := common.NewURL("grpc://127.0.0.1:40000/GrpcGreeterImpl?accesslog=&app.version=0.0.1&application=BDTService&bean.name=GrpcGreeterImpl&cluster=failover&environment=dev&execute.limit=&execute.limit.rejected.handler=&group=&interface=io.grpc.examples.helloworld.GreeterGrpc%24IGreeter&loadbalance=random&methods.SayHello.loadbalance=random&methods.SayHello.retries=1&methods.SayHello.tps.limit.interval=&methods.SayHello.tps.limit.rate=&methods.SayHello.tps.limit.strategy=&methods.SayHello.weight=0&module=dubbogo+say-hello+client&name=BDTService&organization=ikurento.com&owner=ZX&registry.role=3&retries=&service.filter=echo%2Ctoken%2Caccesslog%2Ctps%2Cexecute%2Cpshutdown&timestamp=1576923717&tps.limit.interval=&tps.limit.rate=&tps.limit.rejected.handler=&tps.limit.strategy=&tps.limiter=&version=&warmup=100")
+	url, err := common.NewURL(mockGrpcCommonUrl)
 	assert.NoError(t, err)
 	exporter := proto.Export(protocol.NewBaseInvoker(url))
 	time.Sleep(time.Second)
@@ -61,13 +61,13 @@ func TestGrpcProtocol_Export(t *testing.T) {
 	assert.False(t, ok)
 }
 
-func TestGrpcProtocol_Refer(t *testing.T) {
+func TestGrpcProtocolRefer(t *testing.T) {
 	go internal.InitGrpcServer()
 	defer internal.ShutdownGrpcServer()
 	time.Sleep(time.Second)
 
 	proto := GetProtocol()
-	url, err := common.NewURL("grpc://127.0.0.1:30000/GrpcGreeterImpl?accesslog=&anyhost=true&app.version=0.0.1&application=BDTService&async=false&bean.name=GrpcGreeterImpl&category=providers&cluster=failover&dubbo=dubbo-provider-golang-2.6.0&environment=dev&execute.limit=&execute.limit.rejected.handler=&generic=false&group=&interface=io.grpc.examples.helloworld.GreeterGrpc%24IGreeter&ip=192.168.1.106&loadbalance=random&methods.SayHello.loadbalance=random&methods.SayHello.retries=1&methods.SayHello.tps.limit.interval=&methods.SayHello.tps.limit.rate=&methods.SayHello.tps.limit.strategy=&methods.SayHello.weight=0&module=dubbogo+say-hello+client&name=BDTService&organization=ikurento.com&owner=ZX&pid=49427&reference.filter=cshutdown&registry.role=3&remote.timestamp=1576923717&retries=&service.filter=echo%2Ctoken%2Caccesslog%2Ctps%2Cexecute%2Cpshutdown&side=provider&timestamp=1576923740&tps.limit.interval=&tps.limit.rate=&tps.limit.rejected.handler=&tps.limit.strategy=&tps.limiter=&version=&warmup=100!")
+	url, err := common.NewURL(mockGrpcCommonUrl)
 	assert.NoError(t, err)
 	invoker := proto.Refer(url)
 
diff --git a/protocol/jsonrpc/http_test.go b/protocol/jsonrpc/http_test.go
index f8480bf32e..576591940d 100644
--- a/protocol/jsonrpc/http_test.go
+++ b/protocol/jsonrpc/http_test.go
@@ -48,7 +48,15 @@ type (
 	}
 )
 
-func TestHTTPClient_Call(t *testing.T) {
+const (
+	mockJsonCommonUrl = "jsonrpc://127.0.0.1:20001/UserProvider?anyhost=true&" +
+		"application=BDTService&category=providers&default.timeout=10000&dubbo=dubbo-provider-golang-1.0.0&" +
+		"environment=dev&interface=com.ikurento.user.UserProvider&ip=192.168.56.1&methods=GetUser%2C&" +
+		"module=dubbogo+user-info+server&org=ikurento.com&owner=ZX&pid=1447&revision=0.0.1&" +
+		"side=provider&timeout=3000&timestamp=1556509797245&bean.name=UserProvider"
+)
+
+func TestHTTPClientCall(t *testing.T) {
 
 	methods, err := common.ServiceMap.Register("com.ikurento.user.UserProvider", "jsonrpc", &UserProvider{})
 	assert.NoError(t, err)
@@ -56,11 +64,7 @@ func TestHTTPClient_Call(t *testing.T) {
 
 	// Export
 	proto := GetProtocol()
-	url, err := common.NewURL("jsonrpc://127.0.0.1:20001/UserProvider?anyhost=true&" +
-		"application=BDTService&category=providers&default.timeout=10000&dubbo=dubbo-provider-golang-1.0.0&" +
-		"environment=dev&interface=com.ikurento.user.UserProvider&ip=192.168.56.1&methods=GetUser%2C&" +
-		"module=dubbogo+user-info+server&org=ikurento.com&owner=ZX&pid=1447&revision=0.0.1&" +
-		"side=provider&timeout=3000&timestamp=1556509797245&bean.name=UserProvider")
+	url, err := common.NewURL(mockJsonCommonUrl)
 	assert.NoError(t, err)
 	proto.Export(&proxy_factory.ProxyInvoker{
 		BaseInvoker: *protocol.NewBaseInvoker(url),
diff --git a/protocol/jsonrpc/json.go b/protocol/jsonrpc/json.go
index 389ead9c1a..7b05a22943 100644
--- a/protocol/jsonrpc/json.go
+++ b/protocol/jsonrpc/json.go
@@ -124,10 +124,8 @@ func (c *jsonClientCodec) Write(d *CodecData) ([]byte, error) {
 	if param != nil {
 		switch k := reflect.TypeOf(param).Kind(); k {
 		case reflect.Map:
-			if reflect.TypeOf(param).Key().Kind() == reflect.String {
-				if reflect.ValueOf(param).IsNil() {
-					param = nil
-				}
+			if reflect.TypeOf(param).Key().Kind() == reflect.String && reflect.ValueOf(param).IsNil() {
+				param = nil
 			}
 		case reflect.Slice:
 			if reflect.ValueOf(param).IsNil() {
@@ -137,10 +135,8 @@ func (c *jsonClientCodec) Write(d *CodecData) ([]byte, error) {
 		case reflect.Ptr:
 			switch ptrK := reflect.TypeOf(param).Elem().Kind(); ptrK {
 			case reflect.Map:
-				if reflect.TypeOf(param).Elem().Key().Kind() == reflect.String {
-					if reflect.ValueOf(param).Elem().IsNil() {
-						param = nil
-					}
+				if reflect.TypeOf(param).Elem().Key().Kind() == reflect.String && reflect.ValueOf(param).Elem().IsNil() {
+					param = nil
 				}
 			case reflect.Slice:
 				if reflect.ValueOf(param).Elem().IsNil() {
diff --git a/protocol/jsonrpc/json_test.go b/protocol/jsonrpc/json_test.go
index ade7424612..a3814e9ad5 100644
--- a/protocol/jsonrpc/json_test.go
+++ b/protocol/jsonrpc/json_test.go
@@ -30,7 +30,7 @@ type TestData struct {
 	Test string
 }
 
-func TestJsonClientCodec_Write(t *testing.T) {
+func TestJsonClientCodecWrite(t *testing.T) {
 	cd := &CodecData{
 		ID:     1,
 		Method: "GetUser",
@@ -46,7 +46,7 @@ func TestJsonClientCodec_Write(t *testing.T) {
 	assert.EqualError(t, err, "unsupported param type: int")
 }
 
-func TestJsonClientCodec_Read(t *testing.T) {
+func TestJsonClientCodecRead(t *testing.T) {
 	codec := newJsonClientCodec()
 	codec.pending[1] = "GetUser"
 	rsp := &TestData{}
@@ -60,7 +60,7 @@ func TestJsonClientCodec_Read(t *testing.T) {
 	assert.EqualError(t, err, "{\"code\":-32000,\"message\":\"error\"}")
 }
 
-func TestServerCodec_Write(t *testing.T) {
+func TestServerCodecWrite(t *testing.T) {
 	codec := newServerCodec()
 	a := json.RawMessage([]byte("1"))
 	codec.req = serverRequest{Version: "1.0", Method: "GetUser", ID: &a}
@@ -73,7 +73,7 @@ func TestServerCodec_Write(t *testing.T) {
 	assert.Equal(t, "{\"jsonrpc\":\"2.0\",\"id\":1,\"result\":{\"Test\":\"test\"},\"error\":{\"code\":-32000,\"message\":\"error\"}}\n", string(data))
 }
 
-func TestServerCodec_Read(t *testing.T) {
+func TestServerCodecRead(t *testing.T) {
 	codec := newServerCodec()
 	header := map[string]string{}
 	err := codec.ReadHeader(header, []byte("{\"jsonrpc\":\"2.0\",\"method\":\"GetUser\",\"params\":[\"args\",2],\"id\":1}\n"))
diff --git a/protocol/jsonrpc/jsonrpc_invoker_test.go b/protocol/jsonrpc/jsonrpc_invoker_test.go
index 0f14ba11e2..d7124ca07c 100644
--- a/protocol/jsonrpc/jsonrpc_invoker_test.go
+++ b/protocol/jsonrpc/jsonrpc_invoker_test.go
@@ -34,7 +34,7 @@ import (
 	"github.com/apache/dubbo-go/protocol/invocation"
 )
 
-func TestJsonrpcInvoker_Invoke(t *testing.T) {
+func TestJsonrpcInvokerInvoke(t *testing.T) {
 
 	methods, err := common.ServiceMap.Register("UserProvider", "jsonrpc", &UserProvider{})
 	assert.NoError(t, err)
diff --git a/protocol/jsonrpc/jsonrpc_protocol_test.go b/protocol/jsonrpc/jsonrpc_protocol_test.go
index c00bed12fe..10a9016913 100644
--- a/protocol/jsonrpc/jsonrpc_protocol_test.go
+++ b/protocol/jsonrpc/jsonrpc_protocol_test.go
@@ -34,7 +34,7 @@ import (
 	"github.com/apache/dubbo-go/protocol"
 )
 
-func TestJsonrpcProtocol_Export(t *testing.T) {
+func TestJsonrpcProtocolExport(t *testing.T) {
 	// Export
 	proto := GetProtocol()
 	url, err := common.NewURL("jsonrpc://127.0.0.1:20000/com.ikurento.user.UserProvider?anyhost=true&" +
@@ -65,7 +65,7 @@ func TestJsonrpcProtocol_Export(t *testing.T) {
 	assert.False(t, ok)
 }
 
-func TestJsonrpcProtocol_Refer(t *testing.T) {
+func TestJsonrpcProtocolRefer(t *testing.T) {
 	// Refer
 	proto := GetProtocol()
 	url, err := common.NewURL("jsonrpc://127.0.0.1:20000/com.ikurento.user.UserProvider?anyhost=true&" +
diff --git a/protocol/protocolwrapper/mock_protocol_filter.go b/protocol/protocolwrapper/mock_protocol_filter.go
index 8763c20410..2e9ffed06f 100644
--- a/protocol/protocolwrapper/mock_protocol_filter.go
+++ b/protocol/protocolwrapper/mock_protocol_filter.go
@@ -45,5 +45,5 @@ func (pfw *mockProtocolFilter) Refer(url common.URL) protocol.Invoker {
 
 // Destroy will do nothing
 func (pfw *mockProtocolFilter) Destroy() {
-
+	return
 }
diff --git a/protocol/protocolwrapper/protocol_filter_wrapper_test.go b/protocol/protocolwrapper/protocol_filter_wrapper_test.go
index 8491d57462..b03ea7b9b6 100644
--- a/protocol/protocolwrapper/protocol_filter_wrapper_test.go
+++ b/protocol/protocolwrapper/protocol_filter_wrapper_test.go
@@ -36,7 +36,7 @@ import (
 	"github.com/apache/dubbo-go/protocol"
 )
 
-func TestProtocolFilterWrapper_Export(t *testing.T) {
+func TestProtocolFilterWrapperExport(t *testing.T) {
 	filtProto := extension.GetProtocol(FILTER)
 	filtProto.(*ProtocolFilterWrapper).protocol = &protocol.BaseProtocol{}
 
@@ -48,7 +48,7 @@ func TestProtocolFilterWrapper_Export(t *testing.T) {
 	assert.True(t, ok)
 }
 
-func TestProtocolFilterWrapper_Refer(t *testing.T) {
+func TestProtocolFilterWrapperRefer(t *testing.T) {
 	filtProto := extension.GetProtocol(FILTER)
 	filtProto.(*ProtocolFilterWrapper).protocol = &protocol.BaseProtocol{}
 
diff --git a/protocol/rest/client/client_impl/resty_client.go b/protocol/rest/client/client_impl/resty_client.go
index b60f50a5a7..f301d94504 100644
--- a/protocol/rest/client/client_impl/resty_client.go
+++ b/protocol/rest/client/client_impl/resty_client.go
@@ -50,7 +50,7 @@ func NewRestyClient(restOption *client.RestOptions) client.RestClient {
 	client := resty.New()
 	client.SetTransport(
 		&http.Transport{
-			DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
+			DialContext: func(_ context.Context, network, addr string) (net.Conn, error) {
 				c, err := net.DialTimeout(network, addr, restOption.ConnectTimeout)
 				if err != nil {
 					return nil, err
diff --git a/protocol/rest/config/reader/rest_config_reader_test.go b/protocol/rest/config/reader/rest_config_reader_test.go
index d2dba40b9b..c6f891262c 100644
--- a/protocol/rest/config/reader/rest_config_reader_test.go
+++ b/protocol/rest/config/reader/rest_config_reader_test.go
@@ -31,7 +31,7 @@ import (
 	"github.com/apache/dubbo-go/protocol/rest/config"
 )
 
-func TestRestConfigReader_ReadConsumerConfig(t *testing.T) {
+func TestRestConfigReaderReadConsumerConfig(t *testing.T) {
 	bs, err := yaml.LoadYMLConfig("./testdata/consumer_config.yml")
 	assert.NoError(t, err)
 	configReader := NewRestConfigReader()
@@ -40,7 +40,7 @@ func TestRestConfigReader_ReadConsumerConfig(t *testing.T) {
 	assert.NotEmpty(t, config.GetRestConsumerServiceConfigMap())
 }
 
-func TestRestConfigReader_ReadProviderConfig(t *testing.T) {
+func TestRestConfigReaderReadProviderConfig(t *testing.T) {
 	bs, err := yaml.LoadYMLConfig("./testdata/provider_config.yml")
 	assert.NoError(t, err)
 	configReader := NewRestConfigReader()
diff --git a/protocol/rest/rest_invoker_test.go b/protocol/rest/rest_invoker_test.go
index 2ea260c58d..9df97a211e 100644
--- a/protocol/rest/rest_invoker_test.go
+++ b/protocol/rest/rest_invoker_test.go
@@ -39,7 +39,15 @@ import (
 	"github.com/apache/dubbo-go/protocol/rest/server/server_impl"
 )
 
-func TestRestInvoker_Invoke(t *testing.T) {
+const (
+	mockRestCommonUrl = "rest://127.0.0.1:8877/com.ikurento.user.UserProvider?anyhost=true&" +
+		"application=BDTService&category=providers&default.timeout=10000&dubbo=dubbo-provider-golang-1.0.0&" +
+		"environment=dev&interface=com.ikurento.user.UserProvider&ip=192.168.56.1&methods=GetUser%2C&" +
+		"module=dubbogo+user-info+server&org=ikurento.com&owner=ZX&pid=1447&revision=0.0.1&" +
+		"side=provider&timeout=3000&timestamp=1556509797245"
+)
+
+func TestRestInvokerInvoke(t *testing.T) {
 	// Refer
 	proto := GetRestProtocol()
 	defer proto.Destroy()
@@ -55,11 +63,7 @@ func TestRestInvoker_Invoke(t *testing.T) {
 		chain.ProcessFilter(request, response)
 	})
 
-	url, err := common.NewURL("rest://127.0.0.1:8877/com.ikurento.user.UserProvider?anyhost=true&" +
-		"application=BDTService&category=providers&default.timeout=10000&dubbo=dubbo-provider-golang-1.0.0&" +
-		"environment=dev&interface=com.ikurento.user.UserProvider&ip=192.168.56.1&methods=GetUser%2C&" +
-		"module=dubbogo+user-info+server&org=ikurento.com&owner=ZX&pid=1447&revision=0.0.1&" +
-		"side=provider&timeout=3000&timestamp=1556509797245")
+	url, err := common.NewURL(mockRestCommonUrl)
 	assert.NoError(t, err)
 	_, err = common.ServiceMap.Register("UserProvider", url.Protocol, &UserProvider{})
 	assert.NoError(t, err)
diff --git a/protocol/rest/rest_protocol_test.go b/protocol/rest/rest_protocol_test.go
index 9117148777..9ff4e7df7f 100644
--- a/protocol/rest/rest_protocol_test.go
+++ b/protocol/rest/rest_protocol_test.go
@@ -38,14 +38,10 @@ import (
 	rest_config "github.com/apache/dubbo-go/protocol/rest/config"
 )
 
-func TestRestProtocol_Refer(t *testing.T) {
+func TestRestProtocolRefer(t *testing.T) {
 	// Refer
 	proto := GetRestProtocol()
-	url, err := common.NewURL("rest://127.0.0.1:20000/com.ikurento.user.UserProvider?anyhost=true&" +
-		"application=BDTService&category=providers&default.timeout=10000&dubbo=dubbo-provider-golang-1.0.0&" +
-		"environment=dev&interface=com.ikurento.user.UserProvider&ip=192.168.56.1&methods=GetUser%2C&" +
-		"module=dubbogo+user-info+server&org=ikurento.com&owner=ZX&pid=1447&revision=0.0.1&" +
-		"side=provider&timeout=3000&timestamp=1556509797245")
+	url, err := common.NewURL(mockRestCommonUrl)
 	assert.NoError(t, err)
 	con := config.ConsumerConfig{
 		ConnectTimeout: 5 * time.Second,
@@ -71,14 +67,10 @@ func TestRestProtocol_Refer(t *testing.T) {
 	assert.Equal(t, 0, invokersLen)
 }
 
-func TestRestProtocol_Export(t *testing.T) {
+func TestRestProtocolExport(t *testing.T) {
 	// Export
 	proto := GetRestProtocol()
-	url, err := common.NewURL("rest://127.0.0.1:8888/com.ikurento.user.UserProvider?anyhost=true&" +
-		"application=BDTService&category=providers&default.timeout=10000&dubbo=dubbo-provider-golang-1.0.0&" +
-		"environment=dev&interface=com.ikurento.user.UserProvider&ip=192.168.56.1&methods=GetUser%2C&" +
-		"module=dubbogo+user-info+server&org=ikurento.com&owner=ZX&pid=1447&revision=0.0.1&" +
-		"side=provider&timeout=3000&timestamp=1556509797245")
+	url, err := common.NewURL(mockRestCommonUrl)
 	assert.NoError(t, err)
 	_, err = common.ServiceMap.Register("UserProvider", url.Protocol, &UserProvider{})
 	assert.NoError(t, err)
diff --git a/protocol/rpc_status.go b/protocol/rpc_status.go
index 0eeca6c1bb..60becfb341 100644
--- a/protocol/rpc_status.go
+++ b/protocol/rpc_status.go
@@ -170,12 +170,12 @@ func CurrentTimeMillis() int64 {
 
 // Destroy is used to clean all status
 func CleanAllStatus() {
-	delete1 := func(key interface{}, value interface{}) bool {
+	delete1 := func(key, _ interface{}) bool {
 		methodStatistics.Delete(key)
 		return true
 	}
 	methodStatistics.Range(delete1)
-	delete2 := func(key interface{}, value interface{}) bool {
+	delete2 := func(key, _ interface{}) bool {
 		serviceStatistic.Delete(key)
 		return true
 	}
diff --git a/protocol/rpc_status_test.go b/protocol/rpc_status_test.go
index 611b7cba6e..cc12753cf2 100644
--- a/protocol/rpc_status_test.go
+++ b/protocol/rpc_status_test.go
@@ -30,10 +30,14 @@ import (
 	"github.com/apache/dubbo-go/common"
 )
 
+const (
+	mockCommonDubboUrl = "dubbo://192.168.10.10:20000/com.ikurento.user.UserProvider"
+)
+
 func TestBeginCount(t *testing.T) {
 	defer CleanAllStatus()
 
-	url, _ := common.NewURL("dubbo://192.168.10.10:20000/com.ikurento.user.UserProvider")
+	url, _ := common.NewURL(mockCommonDubboUrl)
 	BeginCount(url, "test")
 	urlStatus := GetURLStatus(url)
 	methodStatus := GetMethodStatus(url, "test")
@@ -47,7 +51,7 @@ func TestBeginCount(t *testing.T) {
 func TestEndCount(t *testing.T) {
 	defer CleanAllStatus()
 
-	url, _ := common.NewURL("dubbo://192.168.10.10:20000/com.ikurento.user.UserProvider")
+	url, _ := common.NewURL(mockCommonDubboUrl)
 	EndCount(url, "test", 100, true)
 	urlStatus := GetURLStatus(url)
 	methodStatus := GetMethodStatus(url, "test")
@@ -60,7 +64,7 @@ func TestEndCount(t *testing.T) {
 func TestGetMethodStatus(t *testing.T) {
 	defer CleanAllStatus()
 
-	url, _ := common.NewURL("dubbo://192.168.10.10:20000/com.ikurento.user.UserProvider")
+	url, _ := common.NewURL(mockCommonDubboUrl)
 	status := GetMethodStatus(url, "test")
 	assert.NotNil(t, status)
 	assert.Equal(t, int32(0), status.total)
@@ -69,25 +73,25 @@ func TestGetMethodStatus(t *testing.T) {
 func TestGetUrlStatus(t *testing.T) {
 	defer CleanAllStatus()
 
-	url, _ := common.NewURL("dubbo://192.168.10.10:20000/com.ikurento.user.UserProvider")
+	url, _ := common.NewURL(mockCommonDubboUrl)
 	status := GetURLStatus(url)
 	assert.NotNil(t, status)
 	assert.Equal(t, int32(0), status.total)
 }
 
-func Test_beginCount0(t *testing.T) {
+func TestbeginCount0(t *testing.T) {
 	defer CleanAllStatus()
 
-	url, _ := common.NewURL("dubbo://192.168.10.10:20000/com.ikurento.user.UserProvider")
+	url, _ := common.NewURL(mockCommonDubboUrl)
 	status := GetURLStatus(url)
 	beginCount0(status)
 	assert.Equal(t, int32(1), status.active)
 }
 
-func Test_All(t *testing.T) {
+func TestAll(t *testing.T) {
 	defer CleanAllStatus()
 
-	url, _ := common.NewURL("dubbo://192.168.10.10:20000/com.ikurento.user.UserProvider")
+	url, _ := common.NewURL(mockCommonDubboUrl)
 	request(url, "test", 100, false, true)
 	urlStatus := GetURLStatus(url)
 	methodStatus := GetMethodStatus(url, "test")