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diff --git a/t/081-basic.t b/t/081-basic.t
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+# -*- mode: perl -*-
+
+## this is the 02basic.t test from Compress::Bzip2 1.03 with no changes
+## (except for comments)
+
+# simple compression/decompression
+
+use strict;
+
+use Test::More tests => 208;
+use Compress::Bzip2 qw(compress decompress);
+
+
+# globals
+
+my $Level = 6;
+my ($In,$Out) = (0,0);
+my @AlNum = ('A'..'Z','a'..'z','0'..'9',' ');
+
+
+# subs
+
+sub try {
+  my $str = shift;
+  my $level = shift || $Level;
+  my $comp = compress($str,$level);
+  return 0 if not defined $comp;
+  my $orig = decompress($comp);
+  return 0 if not defined $orig;
+  $In  += length $orig;
+  $Out += length $comp;
+  return $orig eq $str ? 1 : 0;
+}
+
+
+# tests
+
+# some short strings
+
+my $sum;
+ok(try('', 1),'empty string');
+ok((eval { try(undef) }, $@),'undef fails');
+$sum = 0;
+$sum += try($_) for @AlNum;
+is($sum,scalar(@AlNum),'alphanumerics');
+ok(try('FOO'),'FOO');
+ok(try('bar'),'bar');
+ok(try('          '),'spaces');
+
+# references are supposed to work too
+
+my $str = 'reference test';
+$sum = 0;
+for(1..5) {
+  $str = \$str;
+  $sum += try($str);
+}
+is($sum,5,'reference tests');
+
+# random strings
+
+$sum = 0;
+for my $random(1..100) {
+  my $level = $Level;
+  $level = 1 if 20 == $random;
+  $level = 9 if 80 == $random;
+  my $str = '';
+  $str .= $AlNum[rand @AlNum] for 1..rand 100;
+  $sum += try($str, $level);
+}
+is($sum,100,'100 random strings');
+
+# long strings with repetition
+
+($In,$Out) = (0,0);
+for my $random(1..100) {
+  my $level = $Level;
+  $level = 1 if 20 == $random;
+  $level = 9 if 80 == $random;
+  my $str = '';
+  $str .= ($AlNum[rand @AlNum] x rand 1000) for 1..100+rand 900;
+  ok(try($str, $level),"long string $random");
+}
+#diag(sprintf "compression ratio %.2f%%",100*$Out/$In);
+
+# binary strings
+
+($In,$Out) = (0,0);
+for my $random(1..100) {
+  my $level = $Level;
+  $level = 1 if 20 == $random;
+  $level = 9 if 80 == $random;
+  my $str = '';
+  $str .= chr(rand 256) for 1..1000+rand 9000;
+  ok(try($str, $level),"binary string $random");
+}
+#diag(sprintf "compression ratio %.2f%%",100*$Out/$In);
+