diff --git a/src/testdir/test53.in b/src/testdir/test53.in
index af617c0..c1d5061 100644
--- a/src/testdir/test53.in
+++ b/src/testdir/test53.in
@@ -42,6 +42,9 @@
 gnd$h/\zs
 gnd/[u]niquepattern/s
 vlgnd
+/mother
+:set selection=exclusive
+$cgNmongoose
 :/^start:/,/^end:/wq! test.out
 ENDTEST
 
@@ -69,4 +72,5 @@
 zero width pattern
 delete first and last chars
 uniquepattern uniquepattern
+my very excellent mother just served us nachos
 end: