--- a/tests/test-backout.t	Sat Jul 13 23:45:32 2019 -0400
+++ b/tests/test-backout.t	Tue Jul 02 12:59:58 2019 -0400
@@ -583,12 +583,12 @@
   (branch merge, don't forget to commit)
   $ hg ci -d '4 0' -m 'merge backout of branch1'
   $ hg id
-  22149cdde76d (branch2) tip
+  d97a8500a969 (branch2) tip
   $ hg st -A
   C default
   C file2
   $ hg summary
-  parent: 4:22149cdde76d tip
+  parent: 4:d97a8500a969 tip
    merge backout of branch1
   branch: branch2
   commit: (clean)