diff --git a/tests/hermes_cli/test_gateway_windows.py b/tests/hermes_cli/test_gateway_windows.py
index 65d05d63679..1bf6186fe23 100644
--- a/tests/hermes_cli/test_gateway_windows.py
+++ b/tests/hermes_cli/test_gateway_windows.py
@@ -139,7 +139,7 @@ def test_elevated_gateway_command_uses_pythonw_hidden_console(monkeypatch):
     monkeypatch.setattr(gateway_windows, "_current_profile_cli_args", lambda: ["--profile", "alice"])
     monkeypatch.setattr(gateway_windows, "_derive_venv_pythonw", lambda exe: exe.replace("python.exe", "pythonw.exe"))
     monkeypatch.setattr(gateway_windows.sys, "executable", r"C:\Hermes\venv\Scripts\python.exe")
-    monkeypatch.setattr(gateway_windows.ctypes, "windll", FakeWindll())
+    monkeypatch.setattr(gateway_windows.ctypes, "windll", FakeWindll(), raising=False)
 
     assert gateway_windows._launch_elevated_gateway_command("install", ["--start-now", "--elevated-handoff"])