diff --git a/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/WxMpUserService.java b/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/WxMpUserService.java
index 7523a9f39..5808077c9 100644
--- a/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/WxMpUserService.java
+++ b/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/WxMpUserService.java
@@ -1,18 +1,22 @@
 package me.chanjar.weixin.mp.api;
 
+import java.util.List;
+
 import me.chanjar.weixin.common.error.WxErrorException;
 import me.chanjar.weixin.mp.bean.WxMpUserQuery;
 import me.chanjar.weixin.mp.bean.result.WxMpUser;
 import me.chanjar.weixin.mp.bean.result.WxMpUserList;
 
-import java.util.List;
-
 /**
- * 用户管理相关操作接口
+ * 用户管理相关操作接口.
  *
  * @author Binary Wang
  */
 public interface WxMpUserService {
+  String USER_INFO_BATCH_GET_URL = "https://api.weixin.qq.com/cgi-bin/user/info/batchget";
+  String USER_GET_URL = "https://api.weixin.qq.com/cgi-bin/user/get";
+  String USER_INFO_URL = "https://api.weixin.qq.com/cgi-bin/user/info";
+  String USER_INFO_UPDATE_REMARK_URL = "https://api.weixin.qq.com/cgi-bin/user/info/updateremark";
 
   /**
    * <pre>
@@ -61,9 +65,9 @@ public interface WxMpUserService {
    * 接口地址：https://api.weixin.qq.com/cgi-bin/user/info/batchget?access_token=ACCESS_TOKEN
    * </pre>
    *
-   * @param openids 用户openid列表
+   * @param openidList 用户openid列表
    */
-  List<WxMpUser> userInfoList(List<String> openids) throws WxErrorException;
+  List<WxMpUser> userInfoList(List<String> openidList) throws WxErrorException;
 
   /**
    * <pre>
diff --git a/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/impl/WxMpUserServiceImpl.java b/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/impl/WxMpUserServiceImpl.java
index def801e4e..9af4e7b61 100644
--- a/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/impl/WxMpUserServiceImpl.java
+++ b/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/impl/WxMpUserServiceImpl.java
@@ -1,5 +1,7 @@
 package me.chanjar.weixin.mp.api.impl;
 
+import java.util.List;
+
 import com.google.gson.JsonObject;
 import me.chanjar.weixin.common.error.WxErrorException;
 import me.chanjar.weixin.mp.api.WxMpService;
@@ -8,13 +10,12 @@ import me.chanjar.weixin.mp.bean.WxMpUserQuery;
 import me.chanjar.weixin.mp.bean.result.WxMpUser;
 import me.chanjar.weixin.mp.bean.result.WxMpUserList;
 
-import java.util.List;
-
 /**
  * Created by Binary Wang on 2016/7/21.
+ *
+ * @author BinaryWang
  */
 public class WxMpUserServiceImpl implements WxMpUserService {
-  private static final String API_URL_PREFIX = "https://api.weixin.qq.com/cgi-bin/user";
   private WxMpService wxMpService;
 
   public WxMpUserServiceImpl(WxMpService wxMpService) {
@@ -23,11 +24,10 @@ public class WxMpUserServiceImpl implements WxMpUserService {
 
   @Override
   public void userUpdateRemark(String openid, String remark) throws WxErrorException {
-    String url = API_URL_PREFIX + "/info/updateremark";
     JsonObject json = new JsonObject();
     json.addProperty("openid", openid);
     json.addProperty("remark", remark);
-    this.wxMpService.post(url, json.toString());
+    this.wxMpService.post(USER_INFO_UPDATE_REMARK_URL, json.toString());
   }
 
   @Override
@@ -37,32 +37,28 @@ public class WxMpUserServiceImpl implements WxMpUserService {
 
   @Override
   public WxMpUser userInfo(String openid, String lang) throws WxErrorException {
-    String url = API_URL_PREFIX + "/info";
     lang = lang == null ? "zh_CN" : lang;
-    String responseContent = this.wxMpService.get(url,
+    String responseContent = this.wxMpService.get(USER_INFO_URL,
       "openid=" + openid + "&lang=" + lang);
     return WxMpUser.fromJson(responseContent);
   }
 
   @Override
-  public WxMpUserList userList(String next_openid) throws WxErrorException {
-    String url = API_URL_PREFIX + "/get";
-    String responseContent = this.wxMpService.get(url,
-      next_openid == null ? null : "next_openid=" + next_openid);
+  public WxMpUserList userList(String nextOpenid) throws WxErrorException {
+    String responseContent = this.wxMpService.get(USER_GET_URL,
+      nextOpenid == null ? null : "next_openid=" + nextOpenid);
     return WxMpUserList.fromJson(responseContent);
   }
 
   @Override
-  public List<WxMpUser> userInfoList(List<String> openids)
+  public List<WxMpUser> userInfoList(List<String> openidList)
     throws WxErrorException {
-    return this.userInfoList(new WxMpUserQuery(openids));
+    return this.userInfoList(new WxMpUserQuery(openidList));
   }
 
   @Override
   public List<WxMpUser> userInfoList(WxMpUserQuery userQuery) throws WxErrorException {
-    String url = API_URL_PREFIX + "/info/batchget";
-    String responseContent = this.wxMpService.post(url,
-      userQuery.toJsonString());
+    String responseContent = this.wxMpService.post(USER_INFO_BATCH_GET_URL, userQuery.toJsonString());
     return WxMpUser.fromJsonList(responseContent);
   }
 
diff --git a/weixin-java-mp/src/test/java/me/chanjar/weixin/mp/api/impl/WxMpUserServiceImplTest.java b/weixin-java-mp/src/test/java/me/chanjar/weixin/mp/api/impl/WxMpUserServiceImplTest.java
index 0a4cd21a1..24351879f 100644
--- a/weixin-java-mp/src/test/java/me/chanjar/weixin/mp/api/impl/WxMpUserServiceImplTest.java
+++ b/weixin-java-mp/src/test/java/me/chanjar/weixin/mp/api/impl/WxMpUserServiceImplTest.java
@@ -1,5 +1,11 @@
 package me.chanjar.weixin.mp.api.impl;
 
+import java.util.ArrayList;
+import java.util.List;
+
+import org.testng.*;
+import org.testng.annotations.*;
+
 import com.google.inject.Inject;
 import me.chanjar.weixin.common.error.WxErrorException;
 import me.chanjar.weixin.mp.api.WxMpService;
@@ -8,11 +14,6 @@ import me.chanjar.weixin.mp.api.test.TestConfigStorage;
 import me.chanjar.weixin.mp.bean.WxMpUserQuery;
 import me.chanjar.weixin.mp.bean.result.WxMpUser;
 import me.chanjar.weixin.mp.bean.result.WxMpUserList;
-import org.testng.*;
-import org.testng.annotations.*;
-
-import java.util.ArrayList;
-import java.util.List;
 
 /**
  * 测试用户相关的接口
@@ -20,7 +21,7 @@ import java.util.List;
  * @author chanjarster
  * @author Binary Wang
  */
-@Test(groups = "userAPI")
+@Test
 @Guice(modules = ApiTestModule.class)
 public class WxMpUserServiceImplTest {
 
@@ -68,9 +69,9 @@ public class WxMpUserServiceImplTest {
   public void testUserList() throws WxErrorException {
     WxMpUserList wxMpUserList = this.wxService.getUserService().userList(null);
     Assert.assertNotNull(wxMpUserList);
-    Assert.assertFalse(wxMpUserList.getCount() == -1);
-    Assert.assertFalse(wxMpUserList.getTotal() == -1);
-    Assert.assertFalse(wxMpUserList.getOpenids().size() == -1);
+    Assert.assertNotEquals(-1, wxMpUserList.getCount());
+    Assert.assertNotEquals(-1, wxMpUserList.getTotal());
+    Assert.assertNotEquals(-1, wxMpUserList.getOpenids().size());
     System.out.println(wxMpUserList);
   }