diff --git a/src/testdir/test57.in b/src/testdir/test57.in
index d74af57..8d972e4 100644
--- a/src/testdir/test57.in
+++ b/src/testdir/test57.in
@@ -53,15 +53,19 @@
 t02: numeric
 abc
 ab
-a
 a321
 a123
 a122
+a
+x-22
 b321
 b123
+
 c123d
+-24
  123b
 c321d
+0
 b322b
 b321
 b321b