--- a/tests/test-evolve-templates.t	Fri Jun 16 17:16:26 2017 +0200
+++ b/tests/test-evolve-templates.t	Fri Jun 16 17:21:49 2017 +0200
@@ -128,6 +128,14 @@
   o  []
   
 
+  $ hg log -GT '{successors|json}\n'
+  o  ""
+  |
+  | @  [["d004c8f274b9ec480a47a93c10dac5eee63adb78"]]
+  |/
+  o  ""
+  
+
   $ hg up 'desc(A1)' --hidden
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   working directory parent is obsolete! (a468dc9b3633)