diff --git a/httprunner/client.py b/httprunner/client.py
index 3de5c47f..279c775c 100644
--- a/httprunner/client.py
+++ b/httprunner/client.py
@@ -169,6 +169,8 @@ class HttpSession(requests.Session):
         :param cert: (optional)
             if String, path to ssl client cert file (.pem). If Tuple, ('cert', 'key') pair.
         """
+        self.init_meta_data()
+
         # record test name
         self.meta_data["name"] = name
 
diff --git a/httprunner/runner.py b/httprunner/runner.py
index 71147e57..e910cb0f 100644
--- a/httprunner/runner.py
+++ b/httprunner/runner.py
@@ -282,11 +282,9 @@ class Runner(object):
         """
         self.meta_datas = []
         config = testcase_dict.get("config", {})
-        base_url = config.get("base_url")
 
-        # each testcase should have individual session.
-        http_client_session = self.http_client_session.__class__(base_url)
-        test_runner = Runner(config, self.functions, http_client_session)
+        # each teststeps in one testcase (YAML/JSON) share the same session.
+        test_runner = Runner(config, self.functions, self.http_client_session)
 
         tests = testcase_dict.get("teststeps", [])