diff --git a/examples/httpbin/basic_test.py b/examples/httpbin/basic_test.py
index 5565c15e..c16102bb 100644
--- a/examples/httpbin/basic_test.py
+++ b/examples/httpbin/basic_test.py
@@ -1,4 +1,4 @@
-# NOTE: Generated By HttpRunner v3.1.4
+# NOTE: Generated By HttpRunner v3.1.7
 # FROM: basic.yml
 
 
diff --git a/examples/httpbin/hooks_test.py b/examples/httpbin/hooks_test.py
index 832b3b17..ef4fce08 100644
--- a/examples/httpbin/hooks_test.py
+++ b/examples/httpbin/hooks_test.py
@@ -1,4 +1,4 @@
-# NOTE: Generated By HttpRunner v3.1.4
+# NOTE: Generated By HttpRunner v3.1.7
 # FROM: hooks.yml
 
 
diff --git a/examples/httpbin/load_image_test.py b/examples/httpbin/load_image_test.py
index 61b05f3f..a3827b85 100644
--- a/examples/httpbin/load_image_test.py
+++ b/examples/httpbin/load_image_test.py
@@ -1,4 +1,4 @@
-# NOTE: Generated By HttpRunner v3.1.4
+# NOTE: Generated By HttpRunner v3.1.7
 # FROM: load_image.yml
 
 
diff --git a/examples/httpbin/upload_test.py b/examples/httpbin/upload_test.py
index 134a5575..c3886e0c 100644
--- a/examples/httpbin/upload_test.py
+++ b/examples/httpbin/upload_test.py
@@ -1,4 +1,4 @@
-# NOTE: Generated By HttpRunner v3.1.4
+# NOTE: Generated By HttpRunner v3.1.7
 # FROM: upload.yml
 
 
diff --git a/examples/httpbin/validate_test.py b/examples/httpbin/validate_test.py
index 87b16aa7..c6ddd3f9 100644
--- a/examples/httpbin/validate_test.py
+++ b/examples/httpbin/validate_test.py
@@ -1,4 +1,4 @@
-# NOTE: Generated By HttpRunner v3.1.4
+# NOTE: Generated By HttpRunner v3.1.7
 # FROM: validate.yml
 
 
diff --git a/examples/postman_echo/cookie_manipulation/__init__.py b/examples/postman_echo/cookie_manipulation/__init__.py
new file mode 100644
index 00000000..70cfba53
--- /dev/null
+++ b/examples/postman_echo/cookie_manipulation/__init__.py
@@ -0,0 +1 @@
+# NOTICE: Generated By HttpRunner. DO NOT EDIT!
diff --git a/examples/postman_echo/cookie_manipulation/hardcode.yml b/examples/postman_echo/cookie_manipulation/hardcode.yml
index f81c5f7c..d3b00354 100644
--- a/examples/postman_echo/cookie_manipulation/hardcode.yml
+++ b/examples/postman_echo/cookie_manipulation/hardcode.yml
@@ -2,7 +2,7 @@ config:
     name: "set & delete cookies."
     base_url: "https://postman-echo.com"
     verify: False
-    export: ["cookie_foo1", "cookie_foo3"]
+    export: ["cookie_foo1"]
 
 teststeps:
 -
@@ -16,10 +16,11 @@ teststeps:
         headers:
             User-Agent: HttpRunner/${get_httprunner_version()}
     extract:
-        cookie_foo1: $.cookies.foo1
+        cookie_foo1: body.cookies.foo1
     validate:
         - eq: ["status_code", 200]
-        - eq: ["cookies.foo1", "bar1"]
+        - eq: ["body.cookies.foo1", "bar1"]
+        - eq: ["body.cookies.foo2", "bar2"]
 -
     name: delete cookie foo2
     request:
@@ -29,6 +30,5 @@ teststeps:
             User-Agent: HttpRunner/${get_httprunner_version()}
     validate:
         - eq: ["status_code", 200]
-        - ne: ["$.cookies.foo1", "$foo1"]
-        - eq: ["$.cookies.foo1", "$cookie_foo1"]
-        - eq: ["$.cookies.foo3", "$cookie_foo3"]
+        - eq: ["body.cookies.foo1", "bar1"]
+        - eq: ["body.cookies.foo2", null]
diff --git a/examples/postman_echo/cookie_manipulation/hardcode_test.py b/examples/postman_echo/cookie_manipulation/hardcode_test.py
new file mode 100644
index 00000000..b69b0e40
--- /dev/null
+++ b/examples/postman_echo/cookie_manipulation/hardcode_test.py
@@ -0,0 +1,43 @@
+# NOTE: Generated By HttpRunner v3.1.7
+# FROM: cookie_manipulation/hardcode.yml
+
+
+from httprunner import HttpRunner, Config, Step, RunRequest, RunTestCase
+
+
+class TestCaseHardcode(HttpRunner):
+
+    config = (
+        Config("set & delete cookies.")
+        .base_url("https://postman-echo.com")
+        .verify(False)
+        .export(*["cookie_foo1"])
+    )
+
+    teststeps = [
+        Step(
+            RunRequest("set cookie foo1 & foo2 & foo3")
+            .get("/cookies/set")
+            .with_params(**{"foo1": "bar1", "foo2": "bar2"})
+            .with_headers(**{"User-Agent": "HttpRunner/${get_httprunner_version()}"})
+            .extract()
+            .with_jmespath("body.cookies.foo1", "cookie_foo1")
+            .validate()
+            .assert_equal("status_code", 200)
+            .assert_equal("body.cookies.foo1", "bar1")
+            .assert_equal("body.cookies.foo2", "bar2")
+        ),
+        Step(
+            RunRequest("delete cookie foo2")
+            .get("/cookies/delete?foo2")
+            .with_headers(**{"User-Agent": "HttpRunner/${get_httprunner_version()}"})
+            .validate()
+            .assert_equal("status_code", 200)
+            .assert_equal("body.cookies.foo1", "bar1")
+            .assert_equal("body.cookies.foo2", None)
+        ),
+    ]
+
+
+if __name__ == "__main__":
+    TestCaseHardcode().test_start()
diff --git a/examples/postman_echo/cookie_manipulation/set_delete_cookies_test.py b/examples/postman_echo/cookie_manipulation/set_delete_cookies_test.py
new file mode 100644
index 00000000..77347c7a
--- /dev/null
+++ b/examples/postman_echo/cookie_manipulation/set_delete_cookies_test.py
@@ -0,0 +1,46 @@
+# NOTE: Generated By HttpRunner v3.1.7
+# FROM: cookie_manipulation/set_delete_cookies.yml
+
+
+from httprunner import HttpRunner, Config, Step, RunRequest, RunTestCase
+
+
+class TestCaseSetDeleteCookies(HttpRunner):
+
+    config = (
+        Config("set & delete cookies.")
+        .variables(**{"foo1": "bar1", "foo2": "bar2"})
+        .base_url("https://postman-echo.com")
+        .verify(False)
+        .export(*["cookie_foo1", "cookie_foo3"])
+    )
+
+    teststeps = [
+        Step(
+            RunRequest("set cookie foo1 & foo2 & foo3")
+            .with_variables(**{"foo3": "bar3"})
+            .get("/cookies/set")
+            .with_params(**{"foo1": "bar111", "foo2": "$foo2", "foo3": "$foo3"})
+            .with_headers(**{"User-Agent": "HttpRunner/${get_httprunner_version()}"})
+            .extract()
+            .with_jmespath("$.cookies.foo1", "cookie_foo1")
+            .with_jmespath("$.cookies.foo3", "cookie_foo3")
+            .validate()
+            .assert_equal("status_code", 200)
+            .assert_not_equal("$.cookies.foo3", "$foo3")
+        ),
+        Step(
+            RunRequest("delete cookie foo2")
+            .get("/cookies/delete?foo2")
+            .with_headers(**{"User-Agent": "HttpRunner/${get_httprunner_version()}"})
+            .validate()
+            .assert_equal("status_code", 200)
+            .assert_not_equal("$.cookies.foo1", "$foo1")
+            .assert_equal("$.cookies.foo1", "$cookie_foo1")
+            .assert_equal("$.cookies.foo3", "$cookie_foo3")
+        ),
+    ]
+
+
+if __name__ == "__main__":
+    TestCaseSetDeleteCookies().test_start()