diff --git a/t/test01.t b/t/test01.t
index 3ac3f9e4d..f791e182d 100644
--- a/t/test01.t
+++ b/t/test01.t
@@ -2,66 +2,71 @@ use strict;
 use warnings;
 use 5.14.2;
 
-use Test::More;   # see done_testing()
+use Test::More;    # see done_testing()
 
 # Require Zonemaster::WebBackend::Engine.pm test
 use_ok( 'Zonemaster::WebBackend::Engine' );
 
 # Create Zonemaster::WebBackend::Engine object
-my $engine = Zonemaster::WebBackend::Engine->new({ db => 'Zonemaster::WebBackend::DB::SQLite'} );
-isa_ok($engine, 'Zonemaster::WebBackend::Engine');
+my $engine = Zonemaster::WebBackend::Engine->new( { db => 'Zonemaster::WebBackend::DB::SQLite' } );
+isa_ok( $engine, 'Zonemaster::WebBackend::Engine' );
 
 # create a new memory SQLite database
-ok($engine->{db}->create_db());
+ok( $engine->{db}->create_db() );
 
 # add test user
-ok($engine->add_api_user({username => "zonemaster_test", api_key => "zonemaster_test's api key"}) == 1);
-ok(scalar($engine->{db}->dbh->selectrow_array(q/SELECT * FROM users WHERE user_info like '%zonemaster_test%'/)) == 1);
+ok( $engine->add_api_user( { username => "zonemaster_test", api_key => "zonemaster_test's api key" } ) == 1 );
+ok(
+    scalar( $engine->{db}->dbh->selectrow_array( q/SELECT * FROM users WHERE user_info like '%zonemaster_test%'/ ) ) ==
+      1 );
 
 # add a new test to the db
 my $frontend_params_1 = {
-        client_id => 'Zonemaster CGI/Dancer/node.js', # free string
-        client_version => '1.0',                        # free version like string
-        
-        domain => 'afnic.fr',                         # content of the domain text field
-        advanced => 1,                          # 0 or 1, is the advanced options checkbox checked
-        ipv4 => 1,                                                      # 0 or 1, is the ipv4 checkbox checked
-        ipv6 => 1,                                                      # 0 or 1, is the ipv6 checkbox checked
-        profile => 'test_profile_1',       # the id if the Test profile listbox
-        nameservers => [                                        # list of the namaserves up to 32
-                { ns => 'ns1.nic.fr', ip => '1.1.1.1'},                   # key values pairs representing nameserver => namesterver_ip
-                { ns => 'ns2.nic.fr', ip => '192.134.4.1'},
-        ],
-        ds_digest_pairs => [                            # list of DS/Digest pairs up to 32
-                { algorithm => 'sha1', digest => '0123456789012345678901234567890123456789'},                   # key values pairs representing ds => digest
-                { algorithm => 'sha256', digest => '0123456789012345678901234567890123456789012345678901234567890123'},                   # key values pairs representing ds => digest
-        ],
+    client_id      => 'Zonemaster CGI/Dancer/node.js',    # free string
+    client_version => '1.0',                              # free version like string
+
+    domain      => 'afnic.fr',                            # content of the domain text field
+    advanced    => 1,                                     # 0 or 1, is the advanced options checkbox checked
+    ipv4        => 1,                                     # 0 or 1, is the ipv4 checkbox checked
+    ipv6        => 1,                                     # 0 or 1, is the ipv6 checkbox checked
+    profile     => 'test_profile_1',                      # the id if the Test profile listbox
+    nameservers => [                                      # list of the namaserves up to 32
+        { ns => 'ns1.nic.fr', ip => '1.1.1.1' },          # key values pairs representing nameserver => namesterver_ip
+        { ns => 'ns2.nic.fr', ip => '192.134.4.1' },
+    ],
+    ds_digest_pairs => [                                  # list of DS/Digest pairs up to 32
+        { algorithm => 'sha1', digest => '0123456789012345678901234567890123456789' }
+        ,                                                 # key values pairs representing ds => digest
+        { algorithm => 'sha256', digest => '0123456789012345678901234567890123456789012345678901234567890123' }
+        ,                                                 # key values pairs representing ds => digest
+    ],
 };
-ok($engine->start_domain_test($frontend_params_1) == 1);
-ok(scalar($engine->{db}->dbh->selectrow_array(q/SELECT id FROM test_results WHERE id=1/)) == 1);
+ok( $engine->start_domain_test( $frontend_params_1 ) == 1 );
+ok( scalar( $engine->{db}->dbh->selectrow_array( q/SELECT id FROM test_results WHERE id=1/ ) ) == 1 );
 
 # test test_progress API
-ok($engine->test_progress(1) == 0);
+ok( $engine->test_progress( 1 ) == 0 );
 
-require_ok('Zonemaster::WebBackend::Runner');
-my $command = qq/perl -MZonemaster::WebBackend::Runner -E'Zonemaster::WebBackend::Runner->new\(\{ db => "Zonemaster::WebBackend::DB::SQLite"\} \)->run\(1\)'/;
-system ("$command &");
+require_ok( 'Zonemaster::WebBackend::Runner' );
+my $command =
+qq/perl -MZonemaster::WebBackend::Runner -E'Zonemaster::WebBackend::Runner->new\(\{ db => "Zonemaster::WebBackend::DB::SQLite"\} \)->run\(1\)'/;
+system( "$command &" );
 
-sleep(5);
-ok($engine->test_progress(1) > 0);
+sleep( 5 );
+ok( $engine->test_progress( 1 ) > 0 );
 
-foreach my $i (1..12) {
-	sleep(5);
-	my $progress = $engine->test_progress(1);
-	print STDERR "pregress: $progress\n";
-	last if ($progress == 100);
+foreach my $i ( 1 .. 12 ) {
+    sleep( 5 );
+    my $progress = $engine->test_progress( 1 );
+    print STDERR "pregress: $progress\n";
+    last if ( $progress == 100 );
 }
-ok($engine->test_progress(1) == 100);
-my $test_results = $engine->get_test_results({ id => 1, language => 'fr-FR' });
-ok(defined $test_results->{id}, 'TEST1 $test_results->{id} defined');
-ok(defined $test_results->{params}, 'TEST1 $test_results->{params} defined');
-ok(defined $test_results->{creation_time}, 'TEST1 $test_results->{creation_time} defined');
-ok(defined $test_results->{results}, 'TEST1 $test_results->{results} defined');
-ok(scalar(@{$test_results->{results}}) > 1, 'TEST1 got some results');
+ok( $engine->test_progress( 1 ) == 100 );
+my $test_results = $engine->get_test_results( { id => 1, language => 'fr-FR' } );
+ok( defined $test_results->{id},                 'TEST1 $test_results->{id} defined' );
+ok( defined $test_results->{params},             'TEST1 $test_results->{params} defined' );
+ok( defined $test_results->{creation_time},      'TEST1 $test_results->{creation_time} defined' );
+ok( defined $test_results->{results},            'TEST1 $test_results->{results} defined' );
+ok( scalar( @{ $test_results->{results} } ) > 1, 'TEST1 got some results' );
 
-done_testing();
\ No newline at end of file
+done_testing();
diff --git a/t/test02.t b/t/test02.t
index e78eddcd9..088152632 100644
--- a/t/test02.t
+++ b/t/test02.t
@@ -5,10 +5,14 @@ use 5.14.2;
 use Test::More;    # see done_testing()
 
 my $can_use_threads = eval 'use threads; 1';
+my $can_use_pg = eval 'use DBD::Pg; 1';
 
 if ( not $can_use_threads ) {
     plan skip_all => 'No threads in this perl.';
 }
+elsif ( not $can_use_pg) {
+    plan skip_all => 'Could not load DBD::Pg.';
+}
 else {
     use_ok( 'Zonemaster::WebBackend::Engine' );
 
diff --git a/t/test03.t b/t/test03.t
index 55a2ee56e..50e1eb367 100644
--- a/t/test03.t
+++ b/t/test03.t
@@ -11,7 +11,7 @@ if ( not $can_use_threads ) {
 }
 else {
     # Require Zonemaster::WebBackend::Engine.pm test
-    require_ok( 'Zonemaster::WebBackend::Engine' );
+    use_ok( 'Zonemaster::WebBackend::Engine' );
 
     #require Zonemaster::WebBackend::Engine;
 
diff --git a/t/test_mysql_backend.t b/t/test_mysql_backend.t
index 529780413..a32c6067b 100644
--- a/t/test_mysql_backend.t
+++ b/t/test_mysql_backend.t
@@ -2,7 +2,7 @@ use strict;
 use warnings;
 use 5.14.2;
 
-use Test::More;   # see done_testing()
+use Test::More;    # see done_testing()
 
 my $can_use_threads = eval 'use threads; 1';
 
@@ -11,162 +11,172 @@ if ( not $can_use_threads ) {
 }
 else {
     # Require Zonemaster::WebBackend::Engine.pm test
-require_ok( 'Zonemaster::WebBackend::Engine' );
-#require Zonemaster::WebBackend::Engine;
-
-# Create Zonemaster::WebBackend::Engine object
-my $engine = Zonemaster::WebBackend::Engine->new({ db => 'Zonemaster::WebBackend::DB::MySQL'} );
-isa_ok($engine, 'Zonemaster::WebBackend::Engine');
-
-# create a new memory MySQL database
-ok($engine->{db}->create_db());
-
-# add test user
-ok($engine->add_api_user({username => "zonemaster_test", api_key => "zonemaster_test's api key"}) == 1);
-ok(scalar($engine->{db}->dbh->selectrow_array(q/SELECT * FROM users WHERE user_info like '%zonemaster_test%'/)) == 1);
-
-# add a new test to the db
-my $frontend_params_1 = {
-        client_id => 'Zonemaster CGI/Dancer/node.js', # free string
-        client_version => '1.0',                        # free version like string
-        
-        domain => 'afnic.fr',                         # content of the domain text field
-        advanced_options => 1,                          # 0 or 1, is the advanced options checkbox checked
-        ipv4 => 1,                                                      # 0 or 1, is the ipv4 checkbox checked
-        ipv6 => 1,                                                      # 0 or 1, is the ipv6 checkbox checked
-        test_profile => 'test_profile_1',       # the id if the Test profile listbox
-        nameservers => [                                        # list of the namaserves up to 32
-                { ns => 'ns1.nic.fr', ip => '1.2.3.4'},                   # key values pairs representing nameserver => namesterver_ip
-                { ns => 'ns2.nic.fr', ip => '192.134.4.1'},
+    require_ok( 'Zonemaster::WebBackend::Engine' );
+
+    #require Zonemaster::WebBackend::Engine;
+
+    # Create Zonemaster::WebBackend::Engine object
+    my $engine = Zonemaster::WebBackend::Engine->new( { db => 'Zonemaster::WebBackend::DB::MySQL' } );
+    isa_ok( $engine, 'Zonemaster::WebBackend::Engine' );
+
+    # create a new memory MySQL database
+    ok( $engine->{db}->create_db() );
+
+    # add test user
+    ok( $engine->add_api_user( { username => "zonemaster_test", api_key => "zonemaster_test's api key" } ) == 1 );
+    ok(
+        scalar(
+            $engine->{db}->dbh->selectrow_array( q/SELECT * FROM users WHERE user_info like '%zonemaster_test%'/ )
+        ) == 1
+    );
+
+    # add a new test to the db
+    my $frontend_params_1 = {
+        client_id      => 'Zonemaster CGI/Dancer/node.js',    # free string
+        client_version => '1.0',                              # free version like string
+
+        domain           => 'afnic.fr',                       # content of the domain text field
+        advanced_options => 1,                                # 0 or 1, is the advanced options checkbox checked
+        ipv4             => 1,                                # 0 or 1, is the ipv4 checkbox checked
+        ipv6             => 1,                                # 0 or 1, is the ipv6 checkbox checked
+        test_profile     => 'test_profile_1',                 # the id if the Test profile listbox
+        nameservers      => [                                 # list of the namaserves up to 32
+            { ns => 'ns1.nic.fr', ip => '1.2.3.4' },       # key values pairs representing nameserver => namesterver_ip
+            { ns => 'ns2.nic.fr', ip => '192.134.4.1' },
         ],
-        ds_digest_pairs => [                            # list of DS/Digest pairs up to 32
-                {'ds1' => 'ds-test1'},                   # key values pairs representing ds => digest
-                {'ds2' => 'digest2'},                   
+        ds_digest_pairs => [                               # list of DS/Digest pairs up to 32
+            { 'ds1' => 'ds-test1' },                       # key values pairs representing ds => digest
+            { 'ds2' => 'digest2' },
         ],
-};
-ok($engine->start_domain_test($frontend_params_1) == 1);
-ok(scalar($engine->{db}->dbh->selectrow_array(q/SELECT id FROM test_results WHERE id=1/)) == 1);
-
-# test test_progress API
-ok($engine->test_progress(1) == 0);
-
-require_ok('Zonemaster::WebBackend::Runner');
-threads->create( sub { Zonemaster::WebBackend::Runner->new({ db => 'Zonemaster::WebBackend::DB::MySQL'} )->run(1); } )->detach();
-
-sleep(5);
-ok($engine->test_progress(1) > 0);
-
-foreach my $i (1..12) {
-	sleep(5);
-	my $progress = $engine->test_progress(1);
-	print STDERR "pregress: $progress\n";
-	last if ($progress == 100);
-}
-ok($engine->test_progress(1) == 100);
-my $test_results = $engine->get_test_results({ id => 1, language => 'fr-FR' });
-ok(defined $test_results->{id});
-ok(defined $test_results->{params});
-ok(defined $test_results->{creation_time});
-ok(defined $test_results->{results});
-ok(scalar(@{$test_results->{results}}) > 1);
-
-my $frontend_params_2 = {
-        client_id => 'Zonemaster CGI/Dancer/node.js', # free string
-        client_version => '1.0',                        # free version like string
-        
-        domain => 'afnic.fr',                         # content of the domain text field
-        advanced_options => 1,                          # 0 or 1, is the advanced options checkbox checked
-        ipv4 => 1,                                                      # 0 or 1, is the ipv4 checkbox checked
-        ipv6 => 1,                                                      # 0 or 1, is the ipv6 checkbox checked
-        test_profile => 'test_profile_1',       # the id if the Test profile listbox
-        nameservers => [                                        # list of the namaserves up to 32
-                { ns => 'ns1.nic.fr', ip => '1.2.3.4'},                   # key values pairs representing nameserver => namesterver_ip
-                { ns => 'ns2.nic.fr', ip => '192.134.4.1'},
+    };
+    ok( $engine->start_domain_test( $frontend_params_1 ) == 1 );
+    ok( scalar( $engine->{db}->dbh->selectrow_array( q/SELECT id FROM test_results WHERE id=1/ ) ) == 1 );
+
+    # test test_progress API
+    ok( $engine->test_progress( 1 ) == 0 );
+
+    require_ok( 'Zonemaster::WebBackend::Runner' );
+    threads->create(
+        sub { Zonemaster::WebBackend::Runner->new( { db => 'Zonemaster::WebBackend::DB::MySQL' } )->run( 1 ); } )
+      ->detach();
+
+    sleep( 5 );
+    ok( $engine->test_progress( 1 ) > 0 );
+
+    foreach my $i ( 1 .. 12 ) {
+        sleep( 5 );
+        my $progress = $engine->test_progress( 1 );
+        print STDERR "pregress: $progress\n";
+        last if ( $progress == 100 );
+    }
+    ok( $engine->test_progress( 1 ) == 100 );
+    my $test_results = $engine->get_test_results( { id => 1, language => 'fr-FR' } );
+    ok( defined $test_results->{id} );
+    ok( defined $test_results->{params} );
+    ok( defined $test_results->{creation_time} );
+    ok( defined $test_results->{results} );
+    ok( scalar( @{ $test_results->{results} } ) > 1 );
+
+    my $frontend_params_2 = {
+        client_id      => 'Zonemaster CGI/Dancer/node.js',    # free string
+        client_version => '1.0',                              # free version like string
+
+        domain           => 'afnic.fr',                       # content of the domain text field
+        advanced_options => 1,                                # 0 or 1, is the advanced options checkbox checked
+        ipv4             => 1,                                # 0 or 1, is the ipv4 checkbox checked
+        ipv6             => 1,                                # 0 or 1, is the ipv6 checkbox checked
+        test_profile     => 'test_profile_1',                 # the id if the Test profile listbox
+        nameservers      => [                                 # list of the namaserves up to 32
+            { ns => 'ns1.nic.fr', ip => '1.2.3.4' },       # key values pairs representing nameserver => namesterver_ip
+            { ns => 'ns2.nic.fr', ip => '192.134.4.1' },
         ],
-        ds_digest_pairs => [                            # list of DS/Digest pairs up to 32
-                {'ds1' => 'ds-test2'},                   # key values pairs representing ds => digest
-                {'ds2' => 'digest2'},                   
+        ds_digest_pairs => [                               # list of DS/Digest pairs up to 32
+            { 'ds1' => 'ds-test2' },                       # key values pairs representing ds => digest
+            { 'ds2' => 'digest2' },
         ],
-};
-ok($engine->start_domain_test($frontend_params_2) == 2);
-ok(scalar($engine->{db}->dbh->selectrow_array(q/SELECT id FROM test_results WHERE id=2/)) == 2);
-
-# test test_progress API
-ok($engine->test_progress(2) == 0);
-
-require_ok('Zonemaster::WebBackend::Runner');
-threads->create( sub { Zonemaster::WebBackend::Runner->new({ db => 'Zonemaster::WebBackend::DB::MySQL'} )->run(2); } )->detach();
-
-sleep(5);
-ok($engine->test_progress(2) > 0);
-
-foreach my $i (1..12) {
-	sleep(5);
-	my $progress = $engine->test_progress(2);
-	print STDERR "pregress: $progress\n";
-	last if ($progress == 100);
-}
-ok($engine->test_progress(2) == 100);
-$test_results = $engine->get_test_results({ id => 1, language => 'fr-FR' });
-ok(defined $test_results->{id});
-ok(defined $test_results->{params});
-ok(defined $test_results->{creation_time});
-ok(defined $test_results->{results});
-ok(scalar(@{$test_results->{results}}) > 1);
-
-
-my $frontend_params_3 = {
-        client_id => 'Zonemaster CGI/Dancer/node.js', # free string
-        client_version => '1.0',                        # free version like string
-        
-        domain => 'nic.fr',                         # content of the domain text field
-        advanced_options => 1,                          # 0 or 1, is the advanced options checkbox checked
-        ipv4 => 1,                                                      # 0 or 1, is the ipv4 checkbox checked
-        ipv6 => 1,                                                      # 0 or 1, is the ipv6 checkbox checked
-        test_profile => 'test_profile_1',       # the id if the Test profile listbox
-        nameservers => [                                        # list of the namaserves up to 32
-                { ns => 'ns1.nic.fr', ip => '1.2.3.4'},                   # key values pairs representing nameserver => namesterver_ip
-                { ns => 'ns2.nic.fr', ip => '192.134.4.1'},
+    };
+    ok( $engine->start_domain_test( $frontend_params_2 ) == 2 );
+    ok( scalar( $engine->{db}->dbh->selectrow_array( q/SELECT id FROM test_results WHERE id=2/ ) ) == 2 );
+
+    # test test_progress API
+    ok( $engine->test_progress( 2 ) == 0 );
+
+    require_ok( 'Zonemaster::WebBackend::Runner' );
+    threads->create(
+        sub { Zonemaster::WebBackend::Runner->new( { db => 'Zonemaster::WebBackend::DB::MySQL' } )->run( 2 ); } )
+      ->detach();
+
+    sleep( 5 );
+    ok( $engine->test_progress( 2 ) > 0 );
+
+    foreach my $i ( 1 .. 12 ) {
+        sleep( 5 );
+        my $progress = $engine->test_progress( 2 );
+        print STDERR "pregress: $progress\n";
+        last if ( $progress == 100 );
+    }
+    ok( $engine->test_progress( 2 ) == 100 );
+    $test_results = $engine->get_test_results( { id => 1, language => 'fr-FR' } );
+    ok( defined $test_results->{id} );
+    ok( defined $test_results->{params} );
+    ok( defined $test_results->{creation_time} );
+    ok( defined $test_results->{results} );
+    ok( scalar( @{ $test_results->{results} } ) > 1 );
+
+    my $frontend_params_3 = {
+        client_id      => 'Zonemaster CGI/Dancer/node.js',    # free string
+        client_version => '1.0',                              # free version like string
+
+        domain           => 'nic.fr',                         # content of the domain text field
+        advanced_options => 1,                                # 0 or 1, is the advanced options checkbox checked
+        ipv4             => 1,                                # 0 or 1, is the ipv4 checkbox checked
+        ipv6             => 1,                                # 0 or 1, is the ipv6 checkbox checked
+        test_profile     => 'test_profile_1',                 # the id if the Test profile listbox
+        nameservers      => [                                 # list of the namaserves up to 32
+            { ns => 'ns1.nic.fr', ip => '1.2.3.4' },       # key values pairs representing nameserver => namesterver_ip
+            { ns => 'ns2.nic.fr', ip => '192.134.4.1' },
         ],
-        ds_digest_pairs => [                            # list of DS/Digest pairs up to 32
-                {'ds1' => 'ds-test1'},                   # key values pairs representing ds => digest
-                {'ds2' => 'digest2'},                   
+        ds_digest_pairs => [                               # list of DS/Digest pairs up to 32
+            { 'ds1' => 'ds-test1' },                       # key values pairs representing ds => digest
+            { 'ds2' => 'digest2' },
         ],
-};
-ok($engine->start_domain_test($frontend_params_3) == 3);
-ok(scalar($engine->{db}->dbh->selectrow_array(q/SELECT id FROM test_results WHERE id=3/)) == 3);
-
-# test test_progress API
-ok($engine->test_progress(3) == 0);
-
-require_ok('Zonemaster::WebBackend::Runner');
-threads->create( sub { Zonemaster::WebBackend::Runner->new({ db => 'Zonemaster::WebBackend::DB::MySQL'} )->run(3); } )->detach();
-
-sleep(5);
-ok($engine->test_progress(3) > 0);
-
-foreach my $i (1..20) {
-	sleep(5);
-	my $progress = $engine->test_progress(3);
-	print STDERR "pregress: $progress\n";
-	last if ($progress == 100);
+    };
+    ok( $engine->start_domain_test( $frontend_params_3 ) == 3 );
+    ok( scalar( $engine->{db}->dbh->selectrow_array( q/SELECT id FROM test_results WHERE id=3/ ) ) == 3 );
+
+    # test test_progress API
+    ok( $engine->test_progress( 3 ) == 0 );
+
+    require_ok( 'Zonemaster::WebBackend::Runner' );
+    threads->create(
+        sub { Zonemaster::WebBackend::Runner->new( { db => 'Zonemaster::WebBackend::DB::MySQL' } )->run( 3 ); } )
+      ->detach();
+
+    sleep( 5 );
+    ok( $engine->test_progress( 3 ) > 0 );
+
+    foreach my $i ( 1 .. 20 ) {
+        sleep( 5 );
+        my $progress = $engine->test_progress( 3 );
+        print STDERR "pregress: $progress\n";
+        last if ( $progress == 100 );
+    }
+    ok( $engine->test_progress( 3 ) == 100 );
+    $test_results = $engine->get_test_results( { id => 1, language => 'fr-FR' } );
+    ok( defined $test_results->{id} );
+    ok( defined $test_results->{params} );
+    ok( defined $test_results->{creation_time} );
+    ok( defined $test_results->{results} );
+    ok( scalar( @{ $test_results->{results} } ) > 1 );
+
+    my $offset = 0;
+    my $limit  = 10;
+    my $test_history =
+      $engine->get_test_history( { frontend_params => $frontend_params_1, offset => $offset, limit => $limit } );
+    print STDERR Dumper( $test_history );
+    ok( scalar( @$test_history ) == 2 );
+    ok( $test_history->[0]->{id} == 1 || $test_history->[1]->{id} == 1 );
+    ok( $test_history->[0]->{id} == 2 || $test_history->[1]->{id} == 2 );
+
+    done_testing();
 }
-ok($engine->test_progress(3) == 100);
-$test_results = $engine->get_test_results({ id => 1, language => 'fr-FR' });
-ok(defined $test_results->{id});
-ok(defined $test_results->{params});
-ok(defined $test_results->{creation_time});
-ok(defined $test_results->{results});
-ok(scalar(@{$test_results->{results}}) > 1);
-
-
-my $offset = 0;
-my $limit = 10;
-my $test_history = $engine->get_test_history( { frontend_params => $frontend_params_1, offset => $offset, limit => $limit } );
-print STDERR Dumper($test_history);
-ok(scalar(@$test_history) == 2);
-ok($test_history->[0]->{id} == 1 || $test_history->[1]->{id} == 1);
-ok($test_history->[0]->{id} == 2 || $test_history->[1]->{id} == 2);
-
-done_testing();
-}
\ No newline at end of file
diff --git a/t/test_validate_syntax.t b/t/test_validate_syntax.t
index 785e97d71..5c36cb337 100644
--- a/t/test_validate_syntax.t
+++ b/t/test_validate_syntax.t
@@ -4,7 +4,7 @@ use 5.14.2;
 use utf8;
 
 use Encode;
-use Test::More;   # see done_testing()
+use Test::More;    # see done_testing()
 
 my $can_use_threads = eval 'use threads; 1';
 
@@ -13,227 +13,237 @@ if ( not $can_use_threads ) {
 }
 else {
     # Require Zonemaster::WebBackend::Engine.pm test
-require_ok( 'Zonemaster::WebBackend::Engine' );
-#require Zonemaster::WebBackend::Engine;
-
-# Create Zonemaster::WebBackend::Engine object
-my $engine = Zonemaster::WebBackend::Engine->new({ db => 'Zonemaster::WebBackend::DB::SQLite'} );
-isa_ok($engine, 'Zonemaster::WebBackend::Engine');
-
-=coment
-my $frontend_params = {
-        client_id => 'Zonemaster NoJS', # free string
-        client_version => '1.0',                       # free version like string
-        
-        domain => 'afnic.fr',                         # content of the domain text field
-        advanced_options => 1,                          # 0 or 1, is the advanced options checkbox checked
-        ipv4 => 1,                                                      # 0 or 1, is the ipv4 checkbox checked
-        ipv6 => 1,                                                      # 0 or 1, is the ipv6 checkbox checked
-        test_profile => 'test_profile_1',       # the id if the Test profile listbox
-        nameservers => [                                        # list of the namaserves up to 32
-                { ns => 'ns1.nic.fr', ip => '1.2.3.4'},                   # key values pairs representing nameserver => namesterver_ip
-                { ns => 'ns2.nic.fr', ip => '192.134.4.1'},
-        ],
-        ds_digest_pairs => [                            # list of DS/Digest pairs up to 32
-                { algorithm => 'ds1', digest => 'ds-test1'},                   
-                { algorithm => 'ds2', digest => 'ds-test2'},                   
-        ],
-};
-=cut
-
-my $frontend_params;
-
-$frontend_params->{nameservers} = [                                        # list of the namaserves up to 32
-                { ns => 'ns1.nic.fr', ip => '1.2.3.4'},                   # key values pairs representing nameserver => namesterver_ip
-                { ns => 'ns2.nic.fr', ip => '192.134.4.1'},
-        ];
-
-# domain present?
-$frontend_params->{domain} = '';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'nok', 'domain not present');
-
-# domain present?
-$frontend_params->{domain} = 'afnic.fr';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'ok', 'domain present');
-
-# domain short
-$frontend_params->{domain} = 'a';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'nok', 'domain short');
-
-# root zone
-$frontend_params->{domain} = '.';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'ok', 'root zone');
-
-# idn
-$frontend_params->{domain} = 'é';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'ok', encode_utf8('idn domain=[é]')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-# idn
-$frontend_params->{domain} = 'éé';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'ok', encode_utf8('idn domain=[éé]')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-# 253 characters long domain without dot
-$frontend_params->{domain} = '123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.com';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'ok', encode_utf8('253 characters long domain without dot')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-# 254 characters long domain with trailing dot
-$frontend_params->{domain} = '123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.com.';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'ok', encode_utf8('254 characters long domain with trailing dot')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-# 254 characters long domain without trailing 
-$frontend_params->{domain} = '123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.club';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'nok', encode_utf8('254 characters long domain without trailing dot')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-# 63 characters long domain label
-$frontend_params->{domain} = '012345678901234567890123456789012345678901234567890123456789-63.fr';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'ok', encode_utf8('63 characters long domain label')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-# 64 characters long domain label
-$frontend_params->{domain} = '012345678901234567890123456789012345678901234567890123456789-64-.fr';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'nok', encode_utf8('64 characters long domain label')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-# invalid domain characters 
-$frontend_params->{domain} = 'test1_.fr';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'nok', encode_utf8('invalid domain characters')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-#TEST NS
-$frontend_params->{domain} = 'afnic.fr';
-$frontend_params->{nameservers}->[0]->{ip} = '1.2.3.4';
-	
-# ns present?
-$frontend_params->{nameservers}->[0]->{ns} = '';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'nok', 'domain not present');
-
-# domain present?
-$frontend_params->{nameservers}->[0]->{ns} = 'afnic.fr';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'ok', 'domain present');
-
-# domain short
-$frontend_params->{nameservers}->[0]->{ns} = 'a';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'nok', 'domain short');
-
-# root zone
-$frontend_params->{nameservers}->[0]->{ns} = '.';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'ok', 'root zone');
-
-# idn
-$frontend_params->{nameservers}->[0]->{ns} = 'é';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'ok', encode_utf8('idn domain=[é]')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-# idn
-$frontend_params->{nameservers}->[0]->{ns} = 'éé';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'ok', encode_utf8('idn domain=[éé]')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-# 253 characters long domain without dot
-$frontend_params->{nameservers}->[0]->{ns} = '123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.com';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'ok', encode_utf8('253 characters long domain without dot')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-# 254 characters long domain with trailing dot
-$frontend_params->{nameservers}->[0]->{ns} = '123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.com.';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'ok', encode_utf8('254 characters long domain with trailing dot')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-# 254 characters long domain without trailing 
-$frontend_params->{nameservers}->[0]->{ns} = '123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.club';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'nok', encode_utf8('254 characters long domain without trailing dot')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-# 63 characters long domain label
-$frontend_params->{nameservers}->[0]->{ns} = '012345678901234567890123456789012345678901234567890123456789-63.fr';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'ok', encode_utf8('63 characters long domain label')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-# 64 characters long domain label
-$frontend_params->{nameservers}->[0]->{ns} = '012345678901234567890123456789012345678901234567890123456789-64-.fr';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'nok', encode_utf8('64 characters long domain label')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-# invalid domain characters 
-$frontend_params->{nameservers}->[0]->{ns} = 'test1_.fr';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'nok', encode_utf8('invalid domain characters')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-# DELEGATED TEST
-delete($frontend_params->{nameservers});
-
-$frontend_params->{domain} = 'afnic.fr';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'ok', encode_utf8('delegated domain exists')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-$frontend_params->{domain} = 'afnic.sdfsdfsdlfsmdlf';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'nok', encode_utf8('delegated domain doesn\'t exists')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-# IP ADDRESS FORMAT
-$frontend_params->{domain} = 'afnic.fr';
-$frontend_params->{nameservers}->[0]->{ns} = 'ns1.nic.fr';
-
-$frontend_params->{nameservers}->[0]->{ip} = '1.2.3.4';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'ok', encode_utf8('Valid IPV4')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-$frontend_params->{nameservers}->[0]->{ip} = '1.2.3.4444';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'nok', encode_utf8('Invalid IPV4')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-$frontend_params->{nameservers}->[0]->{ip} = 'fe80::6ef0:49ff:fe7b:e4bb';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'ok', encode_utf8('Valid IPV6')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-$frontend_params->{nameservers}->[0]->{ip} = 'fe80::6ef0:49ff:fe7b:e4bbffffff';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'nok', encode_utf8('Invalid IPV6')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-# DS
-$frontend_params->{domain} = 'afnic.fr';
-$frontend_params->{nameservers}->[0]->{ns} = 'ns1.nic.fr';
-$frontend_params->{nameservers}->[0]->{ip} = '1.2.3.4';
-
-$frontend_params->{ds_digest_pairs}->[0]->{algorithm} = 'sha1';
-$frontend_params->{ds_digest_pairs}->[0]->{digest} = '0123456789012345678901234567890123456789';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'ok', encode_utf8('Valid Algorithm Type [sha1]')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-$frontend_params->{ds_digest_pairs}->[0]->{algorithm} = 'sha256';
-$frontend_params->{ds_digest_pairs}->[0]->{digest} = '0123456789012345678901234567890123456789012345678901234567890123';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'ok', encode_utf8('Valid Algorithm Type [sha256]')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-$frontend_params->{ds_digest_pairs}->[0]->{algorithm} = 'sha2';
-$frontend_params->{ds_digest_pairs}->[0]->{digest} = '0123456789012345678901234567890123456789';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'nok', encode_utf8('Invalid Algorithm Type')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-
-$frontend_params->{ds_digest_pairs}->[0]->{algorithm} = 'sha1';
-$frontend_params->{ds_digest_pairs}->[0]->{digest} = '01234567890123456789012345678901234567890';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'nok', encode_utf8('Invalid [sha1] digest length')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-	
-$frontend_params->{ds_digest_pairs}->[0]->{algorithm} = 'sha256';
-$frontend_params->{ds_digest_pairs}->[0]->{digest} = '01234567890123456789012345678901234567890123456789012345678901230';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'nok', encode_utf8('Invalid [sha256] digest length')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-	
-$frontend_params->{ds_digest_pairs}->[0]->{algorithm} = 'sha1';
-$frontend_params->{ds_digest_pairs}->[0]->{digest} = 'Z123456789012345678901234567890123456789';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'nok', encode_utf8('Invalid [sha1] digest format')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-	
-$frontend_params->{ds_digest_pairs}->[0]->{algorithm} = 'sha256';
-$frontend_params->{ds_digest_pairs}->[0]->{digest} = 'Z123456789012345678901234567890123456789012345678901234567890123';
-ok($engine->validate_syntax($frontend_params)->{status} eq 'nok', encode_utf8('Invalid [sha256] digest fprmat')) 
-	or diag($engine->validate_syntax($frontend_params)->{message});
-	
-done_testing();
-}
\ No newline at end of file
+    use_ok( 'Zonemaster::WebBackend::Engine' );
+
+    # Create Zonemaster::WebBackend::Engine object
+    my $engine = Zonemaster::WebBackend::Engine->new( { db => 'Zonemaster::WebBackend::DB::SQLite' } );
+    isa_ok( $engine, 'Zonemaster::WebBackend::Engine' );
+
+    my $frontend_params = {
+        ipv4 => 1,
+        ipv6 => 1,
+    };
+
+    $frontend_params->{nameservers} = [    # list of the namaserves up to 32
+        { ns => 'ns1.nic.fr', ip => '1.2.3.4' },       # key values pairs representing nameserver => namesterver_ip
+        { ns => 'ns2.nic.fr', ip => '192.134.4.1' },
+    ];
+
+    # domain present?
+    $frontend_params->{domain} = '';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'nok', 'domain not present' );
+
+    # domain present?
+    $frontend_params->{domain} = 'afnic.fr';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'ok', 'domain present' );
+
+    # domain short
+    $frontend_params->{domain} = 'a';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'nok', 'domain short' );
+
+    # root zone
+    $frontend_params->{domain} = '.';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'ok', 'root zone' );
+
+    # idn
+    $frontend_params->{domain} = 'é';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'ok', encode_utf8( 'idn domain=[é]' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    # idn
+    $frontend_params->{domain} = 'éé';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'ok', encode_utf8( 'idn domain=[éé]' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    # 253 characters long domain without dot
+    $frontend_params->{domain} =
+'123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.com';
+    ok(
+        $engine->validate_syntax( $frontend_params )->{status} eq 'ok',
+        encode_utf8( '253 characters long domain without dot' )
+    ) or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    # 254 characters long domain with trailing dot
+    $frontend_params->{domain} =
+'123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.com.';
+    ok(
+        $engine->validate_syntax( $frontend_params )->{status} eq 'ok',
+        encode_utf8( '254 characters long domain with trailing dot' )
+    ) or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    # 254 characters long domain without trailing
+    $frontend_params->{domain} =
+'123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.club';
+    ok(
+        $engine->validate_syntax( $frontend_params )->{status} eq 'nok',
+        encode_utf8( '254 characters long domain without trailing dot' )
+    ) or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    # 63 characters long domain label
+    $frontend_params->{domain} = '012345678901234567890123456789012345678901234567890123456789-63.fr';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'ok',
+        encode_utf8( '63 characters long domain label' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    # 64 characters long domain label
+    $frontend_params->{domain} = '012345678901234567890123456789012345678901234567890123456789-64-.fr';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'nok',
+        encode_utf8( '64 characters long domain label' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    # invalid domain characters
+    $frontend_params->{domain} = 'test1_.fr';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'nok', encode_utf8( 'invalid domain characters' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    #TEST NS
+    $frontend_params->{domain} = 'afnic.fr';
+    $frontend_params->{nameservers}->[0]->{ip} = '1.2.3.4';
+
+    # ns present?
+    $frontend_params->{nameservers}->[0]->{ns} = '';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'nok', 'domain not present' );
+
+    # domain present?
+    $frontend_params->{nameservers}->[0]->{ns} = 'afnic.fr';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'ok', 'domain present' );
+
+    # domain short
+    $frontend_params->{nameservers}->[0]->{ns} = 'a';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'nok', 'domain short' );
+
+    # root zone
+    $frontend_params->{nameservers}->[0]->{ns} = '.';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'ok', 'root zone' );
+
+    # idn
+    $frontend_params->{nameservers}->[0]->{ns} = 'é';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'ok', encode_utf8( 'idn domain=[é]' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    # idn
+    $frontend_params->{nameservers}->[0]->{ns} = 'éé';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'ok', encode_utf8( 'idn domain=[éé]' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    # 253 characters long domain without dot
+    $frontend_params->{nameservers}->[0]->{ns} =
+'123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.com';
+    ok(
+        $engine->validate_syntax( $frontend_params )->{status} eq 'ok',
+        encode_utf8( '253 characters long domain without dot' )
+    ) or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    # 254 characters long domain with trailing dot
+    $frontend_params->{nameservers}->[0]->{ns} =
+'123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.com.';
+    ok(
+        $engine->validate_syntax( $frontend_params )->{status} eq 'ok',
+        encode_utf8( '254 characters long domain with trailing dot' )
+    ) or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    # 254 characters long domain without trailing
+    $frontend_params->{nameservers}->[0]->{ns} =
+'123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.club';
+    ok(
+        $engine->validate_syntax( $frontend_params )->{status} eq 'nok',
+        encode_utf8( '254 characters long domain without trailing dot' )
+    ) or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    # 63 characters long domain label
+    $frontend_params->{nameservers}->[0]->{ns} = '012345678901234567890123456789012345678901234567890123456789-63.fr';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'ok',
+        encode_utf8( '63 characters long domain label' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    # 64 characters long domain label
+    $frontend_params->{nameservers}->[0]->{ns} = '012345678901234567890123456789012345678901234567890123456789-64-.fr';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'nok',
+        encode_utf8( '64 characters long domain label' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    # invalid domain characters
+    $frontend_params->{nameservers}->[0]->{ns} = 'test1_.fr';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'nok', encode_utf8( 'invalid domain characters' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    # DELEGATED TEST
+    delete( $frontend_params->{nameservers} );
+
+    $frontend_params->{domain} = 'afnic.fr';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'ok', encode_utf8( 'delegated domain exists' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    $frontend_params->{domain} = 'afnic.sdfsdfsdlfsmdlf';
+    ok(
+        $engine->validate_syntax( $frontend_params )->{status} eq 'nok',
+        encode_utf8( 'delegated domain doesn\'t exists' )
+    ) or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    # IP ADDRESS FORMAT
+    $frontend_params->{domain} = 'afnic.fr';
+    $frontend_params->{nameservers}->[0]->{ns} = 'ns1.nic.fr';
+
+    $frontend_params->{nameservers}->[0]->{ip} = '1.2.3.4';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'ok', encode_utf8( 'Valid IPV4' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    $frontend_params->{nameservers}->[0]->{ip} = '1.2.3.4444';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'nok', encode_utf8( 'Invalid IPV4' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    $frontend_params->{nameservers}->[0]->{ip} = 'fe80::6ef0:49ff:fe7b:e4bb';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'ok', encode_utf8( 'Valid IPV6' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    $frontend_params->{nameservers}->[0]->{ip} = 'fe80::6ef0:49ff:fe7b:e4bbffffff';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'nok', encode_utf8( 'Invalid IPV6' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    # DS
+    $frontend_params->{domain}                 = 'afnic.fr';
+    $frontend_params->{nameservers}->[0]->{ns} = 'ns1.nic.fr';
+    $frontend_params->{nameservers}->[0]->{ip} = '1.2.3.4';
+
+    $frontend_params->{ds_digest_pairs}->[0]->{algorithm} = 'sha1';
+    $frontend_params->{ds_digest_pairs}->[0]->{digest}    = '0123456789012345678901234567890123456789';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'ok', encode_utf8( 'Valid Algorithm Type [sha1]' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    $frontend_params->{ds_digest_pairs}->[0]->{algorithm} = 'sha256';
+    $frontend_params->{ds_digest_pairs}->[0]->{digest} =
+      '0123456789012345678901234567890123456789012345678901234567890123';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'ok', encode_utf8( 'Valid Algorithm Type [sha256]' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    $frontend_params->{ds_digest_pairs}->[0]->{algorithm} = 'sha2';
+    $frontend_params->{ds_digest_pairs}->[0]->{digest}    = '0123456789012345678901234567890123456789';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'nok', encode_utf8( 'Invalid Algorithm Type' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    $frontend_params->{ds_digest_pairs}->[0]->{algorithm} = 'sha1';
+    $frontend_params->{ds_digest_pairs}->[0]->{digest}    = '01234567890123456789012345678901234567890';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'nok', encode_utf8( 'Invalid [sha1] digest length' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    $frontend_params->{ds_digest_pairs}->[0]->{algorithm} = 'sha256';
+    $frontend_params->{ds_digest_pairs}->[0]->{digest} =
+      '01234567890123456789012345678901234567890123456789012345678901230';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'nok',
+        encode_utf8( 'Invalid [sha256] digest length' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    $frontend_params->{ds_digest_pairs}->[0]->{algorithm} = 'sha1';
+    $frontend_params->{ds_digest_pairs}->[0]->{digest}    = 'Z123456789012345678901234567890123456789';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'nok', encode_utf8( 'Invalid [sha1] digest format' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    $frontend_params->{ds_digest_pairs}->[0]->{algorithm} = 'sha256';
+    $frontend_params->{ds_digest_pairs}->[0]->{digest} =
+      'Z123456789012345678901234567890123456789012345678901234567890123';
+    ok( $engine->validate_syntax( $frontend_params )->{status} eq 'nok',
+        encode_utf8( 'Invalid [sha256] digest fprmat' ) )
+      or diag( $engine->validate_syntax( $frontend_params )->{message} );
+
+    done_testing();
+}