diff --git a/test/dump.js b/test/dump.js
index 58d63c4..3e0baff 100644
--- a/test/dump.js
+++ b/test/dump.js
@@ -70,7 +70,11 @@ $timescale   1ns $end
 0"}G
 #200
 1"}G
-bzzzzxxxx11110000ZZZZXXXX11110000zzzzxxxx11110000zzzzxxxx11110000 {u
+bzzzzxxxx11110000ZZZZXXXX11110000zzzzxxx`);
+
+// break in the middle of the number scan
+
+     inst.write(                       `x11110000zzzzxxxx11110000 {u
 #300
 0"}G
 b1111000000000000000000000000000000000000000000000000000000000000 {u