diff --git a/ate/utils.py b/ate/utils.py
index d7bedbab..6004f55b 100644
--- a/ate/utils.py
+++ b/ate/utils.py
@@ -33,6 +33,19 @@ def parse_response_object(resp_obj):
         'body': resp_body
     }
 
+def diff_json(current_json, expected_json):
+    json_diff = {}
+
+    for key, expected_value in expected_json.items():
+        value = current_json.get(key, None)
+        if str(value) != str(expected_value):
+            json_diff[key] = {
+                'value': value,
+                'expected': expected_value
+            }
+
+    return json_diff
+
 def diff_response(resp_obj, expected_resp_json):
     diff_content = {}
     resp_info = parse_response_object(resp_obj)
@@ -45,16 +58,29 @@ def diff_response(resp_obj, expected_resp_json):
         }
 
     expected_headers = expected_resp_json.get('headers', {})
-    for header_key, expected_header_value in expected_headers.items():
-        header_value = resp_info['headers'].get(header_key, None)
-        if str(header_value) != str(expected_header_value):
+    headers_diff = diff_json(resp_info['headers'], expected_headers)
+    if headers_diff:
+        diff_content['headers'] = headers_diff
 
-            if 'headers' not in diff_content:
-                diff_content['headers'] = {}
+    expected_body = expected_resp_json.get('body', None)
 
-            diff_content['headers'][header_key] = {
-                'value': header_value,
-                'expected': str(expected_header_value)
+    if expected_body is None:
+        body_diff = {}
+    elif type(expected_body) != type(resp_info['body']):
+        body_diff = {
+            'value': resp_info['body'],
+            'expected': expected_body
+        }
+    elif isinstance(expected_body, str):
+        if expected_body != resp_info['body']:
+            body_diff = {
+                'value': resp_info['body'],
+                'expected': expected_body
             }
+    elif isinstance(expected_body, dict):
+        body_diff = diff_json(resp_info['body'], expected_body)
+
+    if body_diff:
+        diff_content['body'] = body_diff
 
     return diff_content
diff --git a/test/api_server.py b/test/api_server.py
index b65c659d..c762c36a 100644
--- a/test/api_server.py
+++ b/test/api_server.py
@@ -28,9 +28,8 @@ def get_customized_response():
     expected_resp_json = request.get_json()
     status_code = expected_resp_json.get('status_code', 200)
     headers_dict = expected_resp_json.get('headers', {})
-    body = expected_resp_json.get('body', "")
-    content = "Response: %s" % json.dumps(expected_resp_json)
-    response = make_response(content, status_code)
+    body = expected_resp_json.get('body', {})
+    response = make_response(json.dumps(body), status_code)
 
     for header_key, header_value in headers_dict.items():
         response.headers[header_key] = header_value
diff --git a/test/test_utils.py b/test/test_utils.py
index b1226b35..182c6d7d 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -131,6 +131,109 @@ class TestUtils(ApiServerUnittest):
             diff_content['headers'],
             {
                 'b': {'expected': '457', 'value': '456'},
-                'd': {'expected': '890', 'value': None}
+                'd': {'expected': 890, 'value': None}
+            }
+        )
+
+    def test_diff_response_body_equal(self):
+        resp_obj = requests.post(
+            url="http://127.0.0.1:5000/customize-response",
+            json={
+                'body': {
+                    'success': True,
+                    'count': 10
+                }
+            }
+        )
+
+        # expected response body is not specified
+        expected_resp_json = {}
+        diff_content = utils.diff_response(resp_obj, expected_resp_json)
+        self.assertFalse(diff_content)
+
+        # response body is the same as expected response body
+        expected_resp_json = {
+            'body': {
+                'success': True,
+                'count': '10'
+            }
+        }
+        diff_content = utils.diff_response(resp_obj, expected_resp_json)
+        self.assertFalse(diff_content)
+
+    def test_diff_response_body_not_equal_type_unmatch(self):
+        resp_obj = requests.post(
+            url="http://127.0.0.1:5000/customize-response",
+            json={
+                'body': {
+                    'success': True,
+                    'count': 10
+                }
+            }
+        )
+
+        # response body content type not match
+        expected_resp_json = {
+            'body': "ok"
+        }
+        diff_content = utils.diff_response(resp_obj, expected_resp_json)
+        self.assertEqual(
+            diff_content['body'],
+            {
+                'value': {'success': True, 'count': 10},
+                'expected': 'ok'
+            }
+        )
+
+    def test_diff_response_body_not_equal_string_unmatch(self):
+        resp_obj = requests.post(
+            url="http://127.0.0.1:5000/customize-response",
+            json={
+                'body': "success"
+            }
+        )
+
+        # response body content type matched to be string, while value unmatch
+        expected_resp_json = {
+            'body': "ok"
+        }
+        diff_content = utils.diff_response(resp_obj, expected_resp_json)
+        self.assertEqual(
+            diff_content['body'],
+            {
+                'value': 'success',
+                'expected': 'ok'
+            }
+        )
+
+    def test_diff_response_body_not_equal_json_unmatch(self):
+        resp_obj = requests.post(
+            url="http://127.0.0.1:5000/customize-response",
+            json={
+                'body': {
+                    'success': False
+                }
+            }
+        )
+
+        # response body is the same as expected response body
+        expected_resp_json = {
+            'body': {
+                'success': True,
+                'count': 10
+            }
+        }
+        diff_content = utils.diff_response(resp_obj, expected_resp_json)
+        self.assertEqual(
+            diff_content['body'],
+            {
+                'success': {
+                    'value': False,
+                    'expected': True
+                },
+                'count': {
+                    'value': None,
+                    'expected': 10
+                }
             }
         )