diff --git a/grpcall.go b/grpcall.go
index 2647420..29ddc4a 100644
--- a/grpcall.go
+++ b/grpcall.go
@@ -26,7 +26,7 @@ type Grpcall struct {
 }
 
 // 构建请求函数
-func (this Grpcall) Invoke(ctx context.Context, service, method, data string, headers []string) (*Response, error) {
+func (this Grpcall) Invoke(service, method, data string, headers []string) (*Response, error) {
 	// 获取 gRPC 服务方法描述信息
 	mtd, err := this.GetServiceMethodDescriptor(service, method)
 	if err != nil {
@@ -35,7 +35,7 @@ func (this Grpcall) Invoke(ctx context.Context, service, method, data string, he
 
 	md := this.MakeMetadata(headers)
 
-	ctx = metadata.NewOutgoingContext(ctx, md)
+	ctx := metadata.NewOutgoingContext(context.Background(), md)
 
 	anyResolver, err := this.GetAnyResolver()
 
diff --git a/grpcall_test.go b/grpcall_test.go
index 7a5fe3b..1e3cd47 100644
--- a/grpcall_test.go
+++ b/grpcall_test.go
@@ -1,7 +1,6 @@
 package grpcall
 
 import (
-	"context"
 	"fmt"
 	"os"
 	"testing"
@@ -43,9 +42,7 @@ func TestGetServiceMethods(t *testing.T) {
 }
 
 func TestInvokeUnary(t *testing.T) {
-	ctx := context.Background()
-
-	if resp, err := gc.Invoke(ctx, "User.UserResourceStatus", "TestInt64Value", `123`, nil); err != nil {
+	if resp, err := gc.Invoke("User.UserResourceStatus", "TestInt64Value", `123`, nil); err != nil {
 		t.Error(err)
 	} else {
 		t.Log(resp.Data())
@@ -53,9 +50,7 @@ func TestInvokeUnary(t *testing.T) {
 }
 
 func TestInvokeServStream(t *testing.T) {
-	ctx := context.Background()
-
-	if resp, err := gc.Invoke(ctx, "User.UserResourceStatus", "GetEvent", `{}`, nil); err != nil {
+	if resp, err := gc.Invoke("User.UserResourceStatus", "GetEvent", `{}`, nil); err != nil {
 		t.Error(err)
 	} else if recv, err := resp.Recv(); err != nil {
 		t.Error(err)
@@ -81,9 +76,7 @@ func TestInvokeServStream(t *testing.T) {
 	}
 }
 func TestInvokeBidiStream(t *testing.T) {
-	ctx := context.Background()
-
-	if resp, err := gc.Invoke(ctx, "User.UserResourceStatus", "TestBidiStream", `"hello"`, nil); err != nil {
+	if resp, err := gc.Invoke("User.UserResourceStatus", "TestBidiStream", `"hello"`, nil); err != nil {
 		t.Error(err)
 	} else if send, err := resp.Send(); err != nil {
 		t.Error(err)