diff --git a/ingestion/internal/mcp/edit_pathio_test.go b/ingestion/internal/mcp/edit_pathio_test.go
index 1fb2f45..ab6d35b 100644
--- a/ingestion/internal/mcp/edit_pathio_test.go
+++ b/ingestion/internal/mcp/edit_pathio_test.go
@@ -111,6 +111,12 @@ func TestBrainEditRollbackDoesNotWriteThroughASymlinkSwappedInForTheNote(t *test
 			})()
 			resp := authCall(t, srv, jwtAuthz, "brain_edit", map[string]any{"path": path, "old_str": "static body", "new_str": "injected"})
 			require.NotNil(t, resp["error"])
+			// The swap happened and the rollback refused it: the error says so,
+			// and the note path is still the planted symlink.
+			assert.Contains(t, resp["error"].(map[string]any)["message"], "could NOT be rolled back")
+			fi, err := os.Lstat(note)
+			require.NoError(t, err)
+			assert.NotZero(t, fi.Mode()&os.ModeSymlink, "the note path is still the swapped-in symlink")
 			got, _ := os.ReadFile(victim)
 			assert.Equal(t, "untouched", string(got), "the rollback wrote through the swapped-in symlink")
 		})