diff --git a/radicale/app/__init__.py b/radicale/app/__init__.py
index a827b4f..85cbcc2 100644
--- a/radicale/app/__init__.py
+++ b/radicale/app/__init__.py
@@ -349,7 +349,7 @@ class Application(
                                           xml_declaration=True)
         return f.getvalue()
 
-    def _webdav_error_response(self, human_tag, status=client.CONFLICT):
+    def _webdav_error_response(self, status, human_tag):
         """Generate XML error response."""
         headers = {"Content-Type": "text/xml; charset=%s" % self._encoding}
         content = self._write_xml_content(xmlutils.webdav_error(human_tag))
diff --git a/radicale/app/mkcalendar.py b/radicale/app/mkcalendar.py
index 0b8d059..b7e16d9 100644
--- a/radicale/app/mkcalendar.py
+++ b/radicale/app/mkcalendar.py
@@ -54,7 +54,8 @@ class ApplicationMkcalendarMixin:
         with self._storage.acquire_lock("w", user):
             item = next(self._storage.discover(path), None)
             if item:
-                return self._webdav_error_response("D:resource-must-be-null")
+                return self._webdav_error_response(
+                    client.CONFLICT, "D:resource-must-be-null")
             parent_path = pathutils.unstrip_path(
                 posixpath.dirname(pathutils.strip_path(path)), True)
             parent_item = next(self._storage.discover(parent_path), None)
diff --git a/radicale/app/move.py b/radicale/app/move.py
index 0515e7b..c2fe71a 100644
--- a/radicale/app/move.py
+++ b/radicale/app/move.py
@@ -76,8 +76,9 @@ class ApplicationMoveMixin:
                     not to_item and
                     to_collection.path != item.collection.path and
                     to_collection.has_uid(item.uid)):
-                return self._webdav_error_response("%s:no-uid-conflict" % (
-                    "C" if tag == "VCALENDAR" else "CR"))
+                return self._webdav_error_response(
+                    client.CONFLICT, "%s:no-uid-conflict" % (
+                        "C" if tag == "VCALENDAR" else "CR"))
             to_href = posixpath.basename(pathutils.strip_path(to_path))
             try:
                 self._storage.move(item, to_collection, to_href)
diff --git a/radicale/app/put.py b/radicale/app/put.py
index b962fbc..786ac00 100644
--- a/radicale/app/put.py
+++ b/radicale/app/put.py
@@ -201,8 +201,9 @@ class ApplicationPutMixin:
                 prepared_item, = prepared_items
                 if (item and item.uid != prepared_item.uid or
                         not item and parent_item.has_uid(prepared_item.uid)):
-                    return self._webdav_error_response("%s:no-uid-conflict" % (
-                        "C" if tag == "VCALENDAR" else "CR"))
+                    return self._webdav_error_response(
+                        client.CONFLICT, "%s:no-uid-conflict" % (
+                            "C" if tag == "VCALENDAR" else "CR"))
 
                 href = posixpath.basename(pathutils.strip_path(path))
                 try: