--- a/tests/test-evolve-issue5967.t	Sun May 03 01:45:04 2020 +0200
+++ b/tests/test-evolve-issue5967.t	Mon Dec 16 11:14:39 2019 -0800
@@ -62,6 +62,9 @@
 
 This is important: 1 should not have a successor (especially not revision 2)
 
+  $ hg debugobsolete
+  3ba7db0ce860a189d1fd1fd7675f0e871652ed16 4d6fec23dcc4c3e4ccce8b1d3b79f62ee927c2be 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '9', 'operation': 'amend', 'user': 'test'}
+  dd9b5dd30cd6b703d126d55b34165fd6ec5717c9 0 {3ba7db0ce860a189d1fd1fd7675f0e871652ed16} (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '0', 'operation': 'evolve', 'user': 'test'}
   $ hg olog --all
   @  4d6fec23dcc4 (2) apricot
   |