--- a/tests/test-clone.t	Sun Jan 20 11:57:36 2019 +0900
+++ b/tests/test-clone.t	Mon Jan 21 22:14:29 2019 +0900
@@ -717,6 +717,9 @@
   $ hg -R src commit -m '#0'
   $ hg -R src log -q
   0:e1bab28bca43
+  $ hg -R src debugrevlog -c | egrep 'format|flags'
+  format : 0
+  flags  : (none)
   $ hg clone -U -q src dst
   $ hg -R dst log -q
   0:e1bab28bca43