diff --git a/tests/core/test_backend_error.py b/tests/core/test_backend_error.py
index 96e4c44c1..ebfd409fb 100644
--- a/tests/core/test_backend_error.py
+++ b/tests/core/test_backend_error.py
@@ -58,7 +58,7 @@ def test_no_status(self) -> None:
 
     def test_unauthorized_short_circuits(self) -> None:
         err = _make_error(status=401)
-        assert str(err) == "Invalid API key. Please check your API key and try again."
+        assert str(err) == "Invalid API key. Please check your API key and try again.  Try `vibe --setup` and re-authenticate"
 
     def test_rate_limit_short_circuits(self) -> None:
         err = _make_error(status=429)