diff --git a/TMWebDriver.py b/TMWebDriver.py
index c14535a18..e01dfa63b 100644
--- a/TMWebDriver.py
+++ b/TMWebDriver.py
@@ -243,8 +243,8 @@ def execute_js(self, code, timeout=15, session_id=None) -> Any:
     
     def _remote_cmd(self, cmd):
         try: return requests.post(self.remote, headers={"Content-Type": "application/json"}, json=cmd, timeout=30).json()
-        except (ConnectionError, requests.exceptions.ConnectionError):
-            raise ConnectionError("TMWebDriver master未运行，看tmwebdriver_sop后台启动一个TMWebDriver")
+        except (ConnectionError, requests.exceptions.ConnectionError) as e:
+            raise ConnectionError("TMWebDriver master未运行，看tmwebdriver_sop后台启动一个TMWebDriver") from e
 
     def get_all_sessions(self):  
         if self.is_remote: