Tell sort to accept old-style options.

diff --git a/tests/sort/Test.pm b/tests/sort/Test.pm
index b85977aa4ec7148b0b464562f498f5a52c4aa3db..1633d7ca10b73acac92387585add01ca385d01a5 100755 (executable)
--- a/tests/sort/Test.pm
+++ b/tests/sort/Test.pm
@@ -3,6 +3,9 @@ package Test;
 require 5.002;
 use strict;
 
+# Tell head to accept old-style options like `-1'.
+$Test::env_default = ['_POSIX2_VERSION=199209'];
+
 my @tv = (
 #test   options   input   expected-output   expected-return-code
 #