diff --git a/tests/update.at b/tests/update.at
index 92c075d0..5c2f748a 100644
--- a/tests/update.at
+++ b/tests/update.at
@@ -36,7 +36,7 @@ tar cf archive directory || exit 1
 echo separator
 tar uf archive directory || exit 1
 echo separator
-tar tf archive || exit 1
+tar tf archive | sort 2>/dev/null || exit 1
 ],
 [0],
 [separator