diff --git a/src/testdir/test53.in b/src/testdir/test53.in
index 011c9ae..8ca9c9e 100644
--- a/src/testdir/test53.in
+++ b/src/testdir/test53.in
@@ -79,6 +79,8 @@
 :" test repeating gUgn
 /^Depp
 gggUgn.
+gg/a:0\@!\zs\d\+
+nygnop
 :/^start:/,/^end:/wq! test.out
 ENDTEST
 
@@ -108,6 +110,11 @@
 uniquepattern uniquepattern
 my very excellent mother just served us nachos
 for (i=0; i<=10; i++)
+a:10
+
+a:1
+
+a:20
 Y
 text
 Y
diff --git a/src/testdir/test53.ok b/src/testdir/test53.ok
index d7ffa6b..0c0b9de 100644
--- a/src/testdir/test53.ok
+++ b/src/testdir/test53.ok
@@ -49,6 +49,12 @@
  uniquepattern
 my very excellent mongoose just served us nachos
 for (j=0; i<=10; i++)
+a:10
+
+a:1
+1
+
+a:20
 
 text
 Y