diff --git a/ate/response.py b/ate/response.py
index 83caedb9..15e08f45 100644
--- a/ate/response.py
+++ b/ate/response.py
@@ -23,7 +23,36 @@ class ResponseObject(object):
             'body': self.parsed_body()
         }
 
-    def extract_response(self, extract_binds, delimiter='.'):
+    def extract_field(self, field, delimiter='.'):
+        """ extract field from requests.Response
+        @param (str) field of requests.Response object, and may be joined by delimiter
+            "status_code"
+            "content"
+            "headers.content-type"
+            "content.person.name.first_name"
+        """
+        try:
+            field += "."
+            # string.split(sep=None, maxsplit=-1) -> list of strings
+            # e.g. "content.person.name" => ["content", "person.name"]
+            top_query, sub_query = field.split(delimiter, 1)
+
+            if top_query in ["body", "content", "text"]:
+                json_content = self.parsed_body()
+            else:
+                json_content = getattr(self.resp_obj, top_query)
+
+            if sub_query:
+                # e.g. key: resp_headers_content_type, sub_query = "content-type"
+                return utils.query_json(json_content, sub_query)
+            else:
+                # e.g. key: resp_status_code, resp_content
+                return json_content
+
+        except AttributeError:
+            raise exception.ParamsError("invalid extract_binds!")
+
+    def extract_response(self, extract_binds):
         """ extract content from requests.Response
         @param (dict) extract_binds
             {
@@ -33,35 +62,15 @@ class ResponseObject(object):
                 "resp_content_person_first_name": "content.person.name.first_name"
             }
         """
-        extract_binds_dict = {}
+        extracted_variables_mapping = {}
 
-        for key, value in extract_binds.items():
-            if not isinstance(value, utils.string_type):
+        for key, field in extract_binds.items():
+            if not isinstance(field, utils.string_type):
                 raise exception.ParamsError("invalid extract_binds!")
 
-            try:
-                value += "."
-                # string.split(sep=None, maxsplit=-1) -> list of strings
-                # e.g. "content.person.name" => ["content", "person.name"]
-                top_query, sub_query = value.split(delimiter, 1)
+            extracted_variables_mapping[key] = self.extract_field(field)
 
-                if top_query in ["body", "content", "text"]:
-                    json_content = self.parsed_body()
-                else:
-                    json_content = getattr(self.resp_obj, top_query)
-
-                if sub_query:
-                    # e.g. key: resp_headers_content_type, sub_query = "content-type"
-                    answer = utils.query_json(json_content, sub_query)
-                    extract_binds_dict[key] = answer
-                else:
-                    # e.g. key: resp_status_code, resp_content
-                    extract_binds_dict[key] = json_content
-
-            except AttributeError:
-                raise exception.ParamsError("invalid extract_binds!")
-
-        return extract_binds_dict
+        return extracted_variables_mapping
 
     def validate(self, validators, variables_mapping):
         """ Bind named validators to value within the context.
@@ -87,15 +96,16 @@ class ResponseObject(object):
         for validator_key, validator_dict in validators.items():
 
             try:
-                value = variables_mapping[validator_key]
-                validator_dict["value"] = value
-                expected_value = validator_dict["expected"]
+                validator_dict["value"] = variables_mapping[validator_key]
             except KeyError:
-                raise exception.ParamsError("invalid validator %s" % validator_key)
+                validator_dict["value"] = self.extract_field(validator_key)
+
+            if "expected" not in validator_dict:
+                raise exception.ParamsError("expected not specified in validator")
 
             match_expected = utils.match_expected(
-                value,
-                expected_value,
+                validator_dict["value"],
+                validator_dict["expected"],
                 validator_dict.get("comparator", "eq")
             )
 
diff --git a/ate/runner.py b/ate/runner.py
index 1b58996a..2c3b4f00 100644
--- a/ate/runner.py
+++ b/ate/runner.py
@@ -77,8 +77,8 @@ class TestRunner(object):
         resp_obj = response.ResponseObject(resp)
 
         extract_binds = testcase.get("extract_binds", {})
-        extract_binds_dict = resp_obj.extract_response(extract_binds)
-        self.context.update_variables(extract_binds_dict)
+        extracted_variables_mapping = resp_obj.extract_response(extract_binds)
+        self.context.update_variables(extracted_variables_mapping)
 
         validators = testcase.get("validators", {})
         diff_content_dict = resp_obj.validate(validators, self.context.variables)
diff --git a/test/data/demo_template_separate.yml b/test/data/demo_template_separate.yml
index 27a999c7..6a1b351e 100644
--- a/test/data/demo_template_separate.yml
+++ b/test/data/demo_template_separate.yml
@@ -21,12 +21,9 @@
             authorization: "${authorization}"
             random: "${random}"
         data: "${data}"
-    extract_binds:
-        resp_status_code: status_code
-        resp_body_success: content.success
     validators:
-        resp_status_code: {"comparator": "eq", "expected": 201}
-        resp_body_success: {"comparator": "eq", "expected": true}
+        status_code: {"comparator": "eq", "expected": 201}
+        content.success: {"comparator": "eq", "expected": true}
 
 - test:
     name: create user which does not exist
@@ -50,9 +47,6 @@
             authorization: "${authorization}"
             random: "${random}"
         data: "${data}"
-    extract_binds:
-        resp_status_code: status_code
-        resp_body_success: content.success
     validators:
-        resp_status_code: {"comparator": "eq", "expected": 500}
-        resp_body_success: {"comparator": "eq", "expected": false}
+        status_code: {"comparator": "eq", "expected": 500}
+        content.success: {"comparator": "eq", "expected": false}
diff --git a/test/data/demo_template_sets.yml b/test/data/demo_template_sets.yml
index 2f4cbb74..754433a4 100644
--- a/test/data/demo_template_sets.yml
+++ b/test/data/demo_template_sets.yml
@@ -25,12 +25,9 @@
             authorization: "${authorization}"
             random: "${random}"
         data: "${data}"
-    extract_binds:
-        resp_status_code: status_code
-        resp_body_success: content.success
     validators:
-        resp_status_code: {"comparator": "eq", "expected": 201}
-        resp_body_success: {"comparator": "eq", "expected": true}
+        status_code: {"comparator": "eq", "expected": 201}
+        content.success: {"comparator": "eq", "expected": true}
 
 - test:
     name: create user which does not exist
@@ -45,9 +42,6 @@
             authorization: "${authorization}"
             random: "${random}"
         data: "${data}"
-    extract_binds:
-        resp_status_code: status_code
-        resp_body_success: content.success
     validators:
-        resp_status_code: {"comparator": "eq", "expected": 500}
-        resp_body_success: {"comparator": "eq", "expected": false}
+        status_code: {"comparator": "eq", "expected": 500}
+        content.success: {"comparator": "eq", "expected": false}
diff --git a/test/data/simple_demo_auth_hardcode.json b/test/data/simple_demo_auth_hardcode.json
index 27d191ab..840288dc 100644
--- a/test/data/simple_demo_auth_hardcode.json
+++ b/test/data/simple_demo_auth_hardcode.json
@@ -15,14 +15,9 @@
                     "password": "123456"
                 }
             },
-            "extract_binds": {
-                "resp_status_code": "status_code",
-                "resp_body_success": "content.success",
-                "resp_body_msg": "content.msg"
-            },
             "validators": {
-                "resp_status_code": {"comparator": "eq", "expected": 201},
-                "resp_body_success": {"comparator": "eq", "expected": true}
+                "status_code": {"comparator": "eq", "expected": 201},
+                "content.success": {"comparator": "eq", "expected": true}
             }
         }
     },
@@ -42,13 +37,9 @@
                     "password": "123456"
                 }
             },
-            "extract_binds": {
-                "resp_status_code": "status_code",
-                "resp_body_success": "content.success"
-            },
             "validators": {
-                "resp_status_code": {"comparator": "eq", "expected": 500},
-                "resp_body_success": {"comparator": "eq", "expected": false}
+                "status_code": {"comparator": "eq", "expected": 500},
+                "content.success": {"comparator": "eq", "expected": false}
             }
         }
     }
diff --git a/test/data/simple_demo_auth_hardcode.yml b/test/data/simple_demo_auth_hardcode.yml
index 8d0c0204..15f66e06 100644
--- a/test/data/simple_demo_auth_hardcode.yml
+++ b/test/data/simple_demo_auth_hardcode.yml
@@ -10,13 +10,9 @@
         json:
             name: "user1"
             password: "123456"
-    extract_binds:
-        resp_status_code: status_code
-        resp_body_success: content.success
-        resp_body_msg: content.msg
     validators:
-        resp_status_code: {"comparator": "eq", "expected": 201}
-        resp_body_success: {"comparator": "eq", "expected": true}
+        status_code: {"comparator": "eq", "expected": 201}
+        content.success: {"comparator": "eq", "expected": true}
 
 - test:
     name: create user which existed
@@ -30,9 +26,6 @@
         json:
             name: "user1"
             password: "123456"
-    extract_binds:
-        resp_status_code: status_code
-        resp_body_success: content.success
     validators:
-        resp_status_code: {"comparator": "eq", "expected": 500}
-        resp_body_success: {"comparator": "eq", "expected": false}
\ No newline at end of file
+        status_code: {"comparator": "eq", "expected": 500}
+        content.success: {"comparator": "eq", "expected": false}
\ No newline at end of file
diff --git a/test/data/simple_demo_no_auth.json b/test/data/simple_demo_no_auth.json
index a076ddcf..ae6c2aaa 100644
--- a/test/data/simple_demo_no_auth.json
+++ b/test/data/simple_demo_no_auth.json
@@ -14,14 +14,9 @@
                     "password": "123456"
                 }
             },
-            "extract_binds": {
-                "resp_status_code": "status_code",
-                "resp_body_success": "content.success",
-                "resp_body_msg": "content.msg"
-            },
             "validators": {
-                "resp_status_code": {"comparator": "eq", "expected": 201},
-                "resp_body_success": {"comparator": "eq", "expected": true}
+                "status_code": {"comparator": "eq", "expected": 201},
+                "content.success": {"comparator": "eq", "expected": true}
             }
         }
     },
@@ -39,13 +34,9 @@
                     "password": "123456"
                 }
             },
-            "extract_binds": {
-                "resp_status_code": "status_code",
-                "resp_body_success": "content.success"
-            },
             "validators": {
-                "resp_status_code": {"comparator": "eq", "expected": 500},
-                "resp_body_success": {"comparator": "eq", "expected": false}
+                "status_code": {"comparator": "eq", "expected": 500},
+                "content.success": {"comparator": "eq", "expected": false}
             }
         }
     }
diff --git a/test/data/simple_demo_no_auth.yml b/test/data/simple_demo_no_auth.yml
index 4be5460e..7a6bf078 100644
--- a/test/data/simple_demo_no_auth.yml
+++ b/test/data/simple_demo_no_auth.yml
@@ -8,14 +8,10 @@
         json:
             name: user1
             password: 123456
-    extract_binds:
-        resp_status_code: status_code
-        resp_body_success: content.success
-        resp_headers_content_type: headers.content-type
     validators:
-        resp_status_code: {"comparator": "eq", "expected": 201}
-        resp_headers_content_type: {"comparator": "eq", "expected": "application/json"}
-        resp_body_success: {"comparator": "eq", "expected": true}
+        status_code: {"comparator": "eq", "expected": 201}
+        headers.content-type: {"comparator": "eq", "expected": "application/json"}
+        content.success: {"comparator": "eq", "expected": true}
 
 - test:
     name: create user which existed
@@ -27,11 +23,7 @@
         json:
             name: user1
             password: 123456
-    extract_binds:
-        resp_status_code: status_code
-        resp_body_success: content.success
-        resp_headers_content_type: headers.content-type
     validators:
-        resp_status_code: {"comparator": "eq", "expected": 500}
-        resp_headers_content_type: {"comparator": "eq", "expected": "application/json"}
-        resp_body_success: {"comparator": "eq", "expected": false}
\ No newline at end of file
+        status_code: {"comparator": "eq", "expected": 500}
+        headers.content-type: {"comparator": "eq", "expected": "application/json"}
+        content.success: {"comparator": "eq", "expected": false}
\ No newline at end of file