--- /dev/null
+#!/usr/bin/perl
+
+use warnings;
+use strict;
+
+use Test::More;
+
+my $rc = 0;
+
+plan tests => 5;
+
+my $side_effect = 0; # Check whether TODO has side effects
+
+$rc = ok(1 == 1, '1 equals 1'); # Test ok() passes when it should
+diag("Returned: $rc");
+
+# Start TODO tests
+TODO: {
+ local $TODO = 'For testing purposes';
+
+ $side_effect++;
+
+ # This test should fail
+ $rc = ok($side_effect == 0, 'side_effect checked out');
+ diag("Returned: $rc");
+
+ # This test should unexpectedly succeed
+ $rc = ok($side_effect == 1, 'side_effect checked out');
+ diag("Returned: $rc");
+}
+
+TODO: {
+ local $TODO = 'Testing printf() expansion in todo_start()';
+
+ $rc = ok(0, 'dummy test');
+ diag("Returned: $rc");
+}
+
+$rc = ok($side_effect == 1, "side_effect is $side_effect");
+diag("Returned: $rc");