diff --git a/wda/__init__.py b/wda/__init__.py
index d011b8f..e33ded8 100644
--- a/wda/__init__.py
+++ b/wda/__init__.py
@@ -1347,7 +1347,7 @@ def _fix_xcui_type(self, s):
         if s is None:
             return
         re_element = '|'.join(xcui_element_types.ELEMENTS)
-        return re.sub(r'/(' + re_element + ')', '/XCUIElementType\g<1>', s)
+        return re.sub(r'/(' + re_element + ')', r'/XCUIElementType\g<1>', s)
 
     def _add_escape_character_for_quote_prime_character(self, text):
         """
@@ -1762,7 +1762,10 @@ def selected(self):
 class USBClient(Client):
     """ connect device through unix:/var/run/usbmuxd """
 
-    def __init__(self, udid: str = "", port: int = 8100):
+    def __init__(self, udid: str = "", port: int = 8100, wda_bundle_id: Optional[str] = None):
+        """
+        wda_bundle_id: useless now, just for compability
+        """
         if not udid:
             infos = [info for info in list_devices() if info.connection_type == 'USB']
             if len(infos) == 0:
@@ -1772,7 +1775,5 @@ def __init__(self, udid: str = "", port: int = 8100):
             udid = infos[0].serial
 
         super().__init__(url=f"http+usbmux://{udid}:{port}")
-        if self.is_ready():
-            return
-
-            raise RuntimeError("WDA is not ready after waiting for 20 seconds")
+        # if not self.wait_ready(timeout=20, noprint=True):
+        #     raise RuntimeError("WDA is not ready after waiting for 20 seconds")