--- /dev/null
+use strict;
+use Test::More tests => 3;
+
+my $text = "";
+use HTML::Parser ();
+my $p = HTML::Parser->new(default_h => [sub { $text .= shift }, "text"],
+ );
+
+my $html = <<'EOT';
+
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
+ "http://www.w3.org/TR/html40/strict.dtd">
+
+<title>foo</title>
+<!-- comment <a> -->
+<?process instruction>
+
+EOT
+
+$p->parse($html)->eof;
+
+is($text, $html);
+
+$text = "";
+$p->handler(start => sub { }, "");
+$p->handler(declaration => sub { }, "");
+$p->parse($html)->eof;
+
+my $html2;
+$html2 = $html;
+$html2 =~ s/<title>//;
+$html2 =~ s/<!DOCTYPE[^>]*>//;
+
+is($text, $html2);
+
+$text = "";
+$p->handler(start => undef);
+$p->parse($html)->eof;
+
+$html2 = $html;
+$html2 =~ s/<!DOCTYPE[^>]*>//;
+
+is($text, $html2);