diff --git a/src/testdir/test_clientserver.vim b/src/testdir/test_clientserver.vim
index f358117..1cbcb19 100644
--- a/src/testdir/test_clientserver.vim
+++ b/src/testdir/test_clientserver.vim
@@ -98,7 +98,11 @@
       call job_stop(job, 'kill')
     endif
   endtry
+
+  call assert_fails("let x=remote_peek([])", 'E730:')
 endfunc
 
 " Uncomment this line to get a debugging log
 " call ch_logfile('channellog', 'w')
+
+" vim: shiftwidth=2 sts=2 expandtab