--- /dev/null
+#!/usr/bin/perl -w
+
+BEGIN {
+ if( $ENV{PERL_CORE} ) {
+ chdir 't';
+ @INC = '../lib';
+ }
+}
+
+use Test::More;
+
+plan tests => 4;
+eval { plan tests => 4 };
+is( $@, sprintf("You tried to plan twice at %s line %d.\n", $0, __LINE__ - 1),
+ 'disallow double plan' );
+eval { plan 'no_plan' };
+is( $@, sprintf("You tried to plan twice at %s line %d.\n", $0, __LINE__ -1),
+ 'disallow changing plan' );
+
+pass('Just testing plan()');
+pass('Testing it some more');