--- a/tests/test-rebase-collapse.t	Tue Nov 17 19:29:08 2020 +0900
+++ b/tests/test-rebase-collapse.t	Mon Nov 16 15:11:51 2020 -0800
@@ -551,7 +551,7 @@
   $ hg rebase --collapse -r 1 -d 0
   abort: cannot rebase changeset with children
   (use --keep to keep original changesets)
-  [255]
+  [10]
 
 Test collapsing in place