diff --git a/tools/install_modules.sh b/tools/install_modules.sh
index 2e2f8b0dd..0f12d9d28 100755
--- a/tools/install_modules.sh
+++ b/tools/install_modules.sh
@@ -32,6 +32,7 @@ cpan install Authen::Passphrase::LANManager \
              Crypt::Skip32                  \
              Crypt::Twofish                 \
              Crypt::UnixCrypt_XS            \
+             Data::Types                    \
              Digest::BLAKE2                 \
              Digest::CMAC                   \
              Digest::CRC                    \
diff --git a/tools/test.pl b/tools/test.pl
index 548dde66e..524052872 100755
--- a/tools/test.pl
+++ b/tools/test.pl
@@ -24,7 +24,9 @@ is_in_array ($TYPE, $TYPES) or usage_exit ();
 
 is_whole ($MODE) or die "Mode must be a number\n";
 
-eval { require "m$MODE.pm" } or die "Could not load test module:\n$@";
+my $module = sprintf ("m%05d.pm", $MODE);
+
+eval { require $module; } or die "Could not load test module: $module\n$@";
 
 if ($TYPE eq 'single')
 {
diff --git a/tools/test_modules/m0.pm b/tools/test_modules/m00000.pm
similarity index 97%
rename from tools/test_modules/m0.pm
rename to tools/test_modules/m00000.pm
index da25bf5c1..3016c4a96 100644
--- a/tools/test_modules/m0.pm
+++ b/tools/test_modules/m00000.pm
@@ -6,6 +6,7 @@
 ##
 
 use strict;
+use warnings;
 
 use Digest::MD5 qw (md5_hex);
 
diff --git a/tools/test_modules/m100.pm b/tools/test_modules/m00100.pm
similarity index 97%
rename from tools/test_modules/m100.pm
rename to tools/test_modules/m00100.pm
index 7f87d334f..cfa422e91 100644
--- a/tools/test_modules/m100.pm
+++ b/tools/test_modules/m00100.pm
@@ -6,6 +6,7 @@
 ##
 
 use strict;
+use warnings;
 
 use Digest::SHA qw (sha1_hex);
 
diff --git a/tools/test_modules/m110.pm b/tools/test_modules/m00110.pm
similarity index 97%
rename from tools/test_modules/m110.pm
rename to tools/test_modules/m00110.pm
index a4883124c..5c8e8f9c4 100644
--- a/tools/test_modules/m110.pm
+++ b/tools/test_modules/m00110.pm
@@ -6,6 +6,7 @@
 ##
 
 use strict;
+use warnings;
 
 use Digest::SHA qw (sha1_hex);
 
diff --git a/tools/test_modules/m120.pm b/tools/test_modules/m00120.pm
similarity index 97%
rename from tools/test_modules/m120.pm
rename to tools/test_modules/m00120.pm
index 765f959e6..71325a2d4 100644
--- a/tools/test_modules/m120.pm
+++ b/tools/test_modules/m00120.pm
@@ -6,6 +6,7 @@
 ##
 
 use strict;
+use warnings;
 
 use Digest::SHA qw (sha1_hex);
 
diff --git a/tools/test_modules/m01000.pm b/tools/test_modules/m01000.pm
new file mode 100644
index 000000000..be27b5d62
--- /dev/null
+++ b/tools/test_modules/m01000.pm
@@ -0,0 +1,41 @@
+#!/usr/bin/env perl
+
+##
+## Author......: See docs/credits.txt
+## License.....: MIT
+##
+
+use strict;
+use warnings;
+
+use Digest::MD4 qw (md4_hex);
+use Encode;
+
+sub module_generate_hash
+{
+  my $word = shift;
+
+  my $hash = md4_hex (encode ("UTF-16LE", $word));
+
+  return $hash;
+}
+
+sub module_verify_hash
+{
+  my $line = shift;
+
+  my ($hash, $word) = split ":", $line;
+
+  return unless defined $hash;
+  return unless defined $word;
+
+  $word = pack_if_HEX_notation ($word);
+
+  my $new_hash = module_generate_hash ($word);
+
+  return unless $new_hash eq $hash;
+
+  return $new_hash;
+}
+
+1;
diff --git a/tools/test_modules/m18400.pm b/tools/test_modules/m18400.pm
index 0c7ed42c8..182e5bb61 100644
--- a/tools/test_modules/m18400.pm
+++ b/tools/test_modules/m18400.pm
@@ -6,6 +6,7 @@
 ##
 
 use strict;
+use warnings;
 
 use Crypt::Mode::CBC;
 use Crypt::PBKDF2;
diff --git a/tools/test_modules/m18600.pm b/tools/test_modules/m18600.pm
index e18fb2bd5..68155ad96 100644
--- a/tools/test_modules/m18600.pm
+++ b/tools/test_modules/m18600.pm
@@ -6,6 +6,7 @@
 ##
 
 use strict;
+use warnings;
 
 use Crypt::GCrypt;
 use Crypt::PBKDF2;