diff --git a/tests/test_sessions.py b/tests/test_sessions.py
index ee2bf0b..b387f3d 100644
--- a/tests/test_sessions.py
+++ b/tests/test_sessions.py
@@ -1617,7 +1617,9 @@ async def test_clone_session_for_window_reuses_project_harness_model(
     )
     captured = {}
 
-    async def fake_create(project_id, harness_name, nickname=None, model=None):
+    async def fake_create(
+        project_id, harness_name, nickname=None, model=None, worktree_branch=None
+    ):
         captured["args"] = (project_id, harness_name, nickname, model)
         return "SENTINEL"