diff --git a/Pipfile b/Pipfile
index adfed968..20e0a697 100644
--- a/Pipfile
+++ b/Pipfile
@@ -14,6 +14,7 @@ requests-toolbelt = "*"
 
 [dev-packages]
 flask = "*"
+httpbin = "*"
 coverage = "*"
 coveralls = "*"
 twine = "*"
diff --git a/httprunner/__about__.py b/httprunner/__about__.py
index a1b97cc9..6679e62f 100644
--- a/httprunner/__about__.py
+++ b/httprunner/__about__.py
@@ -1,7 +1,7 @@
 __title__ = 'HttpRunner'
 __description__ = 'One-stop solution for HTTP(S) testing.'
 __url__ = 'https://github.com/HttpRunner/HttpRunner'
-__version__ = '1.4.0.beta'
+__version__ = '1.4.0.beta.2'
 __author__ = 'debugtalk'
 __author_email__ = 'mail@debugtalk.com'
 __license__ = 'MIT'
diff --git a/tests/base.py b/tests/base.py
index cf5d8533..ca7c96be 100644
--- a/tests/base.py
+++ b/tests/base.py
@@ -3,12 +3,18 @@ import time
 import unittest
 
 import requests
+from httpbin import app as httpbin_app
 from httprunner import utils
-from tests import api_server
+from tests.api_server import app as flask_app
 
+FLASK_APP_PORT = 5000
+HTTPBIN_APP_PORT = 3458
 
-def apprun():
-    api_server.app.run()
+def run_flask():
+    flask_app.run(port=FLASK_APP_PORT)
+
+def run_httpbin():
+    httpbin_app.run(port=HTTPBIN_APP_PORT)
 
 
 class ApiServerUnittest(unittest.TestCase):
@@ -18,16 +24,21 @@ class ApiServerUnittest(unittest.TestCase):
     @classmethod
     def setUpClass(cls):
         cls.host = "http://127.0.0.1:5000"
-        cls.api_server_process = multiprocessing.Process(
-            target=apprun
+        cls.flask_process = multiprocessing.Process(
+            target=run_flask
         )
-        cls.api_server_process.start()
+        cls.httpbin_process = multiprocessing.Process(
+            target=run_httpbin
+        )
+        cls.flask_process.start()
+        cls.httpbin_process.start()
         time.sleep(0.1)
         cls.api_client = requests.Session()
 
     @classmethod
     def tearDownClass(cls):
-        cls.api_server_process.terminate()
+        cls.flask_process.terminate()
+        cls.httpbin_process.terminate()
 
     def get_token(self, user_agent, device_sn, os_platform, app_version):
         url = "%s/api/get-token" % self.host
diff --git a/tests/httpbin/hooks.yml b/tests/httpbin/hooks.yml
index bdb5a11a..67cd3339 100644
--- a/tests/httpbin/hooks.yml
+++ b/tests/httpbin/hooks.yml
@@ -1,7 +1,7 @@
 - config:
     name: basic test with httpbin
     request:
-        base_url: https://httpbin.org/
+        base_url: http://127.0.0.1:3458/
 
 - test:
     name: headers
@@ -13,4 +13,4 @@
         - setup_hook_remove_kwargs
     validate:
         - eq: ["status_code", 200]
-        - eq: [content.headers.Host, "httpbin.org"]
+        - eq: [content.headers.Host, "127.0.0.1:3458"]
diff --git a/tests/httpbin/load_image.yml b/tests/httpbin/load_image.yml
index 6a131fdd..78c97a52 100644
--- a/tests/httpbin/load_image.yml
+++ b/tests/httpbin/load_image.yml
@@ -1,7 +1,7 @@
 - config:
     name: load images
     request:
-        base_url: https://httpbin.org
+        base_url: http://127.0.0.1:3458
 
 - test:
     name: get png image
diff --git a/tests/httpbin/upload.yml b/tests/httpbin/upload.yml
index 5f182eed..27728949 100644
--- a/tests/httpbin/upload.yml
+++ b/tests/httpbin/upload.yml
@@ -1,7 +1,7 @@
 - config:
     name: test upload file with httpbin
     request:
-        base_url: https://httpbin.org
+        base_url: http://127.0.0.1:3458
 
 - test:
     name: upload file
diff --git a/tests/test_httprunner.py b/tests/test_httprunner.py
index 992bd775..05b52fbc 100644
--- a/tests/test_httprunner.py
+++ b/tests/test_httprunner.py
@@ -115,7 +115,7 @@ class TestHttpRunner(ApiServerUnittest):
                     {
                         "name": "post data",
                         "request": {
-                            "url": "https://httpbin.org/post",
+                            "url": "http://127.0.0.1:3458/post",
                             "method": "POST",
                             "headers": {
                                 "Content-Type": "application/json"