--- a/tests/test-command-template.t	Sat Sep 30 08:50:24 2017 +0100
+++ b/tests/test-command-template.t	Sat Sep 30 08:57:50 2017 +0100
@@ -4130,6 +4130,9 @@
   $ hg log -r2 -T '{get(namespaces, "bookmarks") % "{name}\n"}'
   bar
   foo
+  $ hg log -r2 -T '{namespaces.bookmarks % "{bookmark}\n"}'
+  bar
+  foo
 
 Test stringify on sub expressions