diff --git a/2.x/chapter2-1/src/test/java/com/didispace/chapter21/Chapter21ApplicationTests.java b/2.x/chapter2-1/src/test/java/com/didispace/chapter21/Chapter21ApplicationTests.java
index 880d2823..287a7d4a 100644
--- a/2.x/chapter2-1/src/test/java/com/didispace/chapter21/Chapter21ApplicationTests.java
+++ b/2.x/chapter2-1/src/test/java/com/didispace/chapter21/Chapter21ApplicationTests.java
@@ -49,7 +49,7 @@ public void testUserController() throws Exception {
         request = get("/users/");
         mvc.perform(request)
                 .andExpect(status().isOk())
-                .andExpect(content().string(equalTo("[{\"id\":1,\"name\":\"测试大师\",\"age\":20}]")));
+                .andExpect(content().json("[{\"id\":1,\"name\":\"测试大师\",\"age\":20}]"));
 
         // 4、put修改id为1的user
         request = put("/users/1")
@@ -61,7 +61,7 @@ public void testUserController() throws Exception {
         // 5、get一个id为1的user
         request = get("/users/1");
         mvc.perform(request)
-                .andExpect(content().string(equalTo("{\"id\":1,\"name\":\"测试终极大师\",\"age\":30}")));
+                .andExpect(content().json("{\"id\":1,\"name\":\"测试终极大师\",\"age\":30}"));
 
         // 6、del删除id为1的user
         request = delete("/users/1");