--- a/tests/test-command-template.t	Sat Apr 01 17:25:45 2017 +0900
+++ b/tests/test-command-template.t	Sat Apr 01 17:28:28 2017 +0900
@@ -4097,6 +4097,12 @@
   $ hg log -T '{revset("%s", 0, 1)}\n'
   hg: parse error: too many revspec arguments specified
   [255]
+  $ hg log -T '{revset("%", 0)}\n'
+  hg: parse error: incomplete revspec format character
+  [255]
+  $ hg log -T '{revset("%l", 0)}\n'
+  hg: parse error: incomplete revspec format character
+  [255]
 
 Test files function