--- a/tests/test-bookmarks.t	Wed Jun 07 19:21:02 2017 +0100
+++ b/tests/test-bookmarks.t	Wed Jun 07 22:26:43 2017 +0100
@@ -700,7 +700,7 @@
 
 test missing revisions
 
-  $ echo "925d80f479bc z" > .hg/bookmarks
+  $ echo "925d80f479b925d80f479bc925d80f479bccabab z" > .hg/bookmarks
   $ hg book
   no bookmarks set