diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 9f8e606c..119d6af8 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -82,7 +82,6 @@ jobs:
           eval $(perl -I ${{ env.PERL_CACHE }}/lib/perl5/ -Mlocal::lib)
           
           cpanm --quiet --notest Module::Build
-          cpanm --quiet --notest Alien::Tidyp
           
           ./scripts/install_wsi_dependencies.sh "$NPG_LIB" \
              perl-dnap-utilities \
diff --git a/Build.PL b/Build.PL
index 2a9b5f6a..ca5ad317 100644
--- a/Build.PL
+++ b/Build.PL
@@ -158,7 +158,7 @@ my $builder = $class->new(
                 'GD::Text'                        => 0,
                 'Getopt::Long'                    => '2.37',
                 'HTML::PullParser'                => '3.57',
-                'HTML::Tidy'                      => 0,
+                'HTML::Valid'                     => 0,
                 'HTTP::Request'                   => '5.818',
                 'HTTP::Request::Common'           => '5.822',
                 'HTTP::Response'                  => 0,
diff --git a/lib/npg_testing/html.pm b/lib/npg_testing/html.pm
index bc5c5577..6ed62d02 100644
--- a/lib/npg_testing/html.pm
+++ b/lib/npg_testing/html.pm
@@ -5,7 +5,7 @@ use warnings;
 use Carp;
 use English qw{-no_match_vars};
 use Exporter;
-use HTML::Tidy;
+use HTML::Valid;
 
 our $VERSION = '0';
 
@@ -28,21 +28,21 @@ A collection of test routines for html
 
 ## no critic (ProhibitExplicitISA)
 our @ISA       = qw(Exporter);
-our @EXPORT_OK = qw(html_tidy_ok);
+our @EXPORT_OK = qw(html_valid_ok);
 
-=head2 html_tidy_ok
+=head2 html_valid_ok
 
-Test utilising HTML::Tidy
+Test utilising HTML::Valid
 
 =cut
-sub html_tidy_ok {
+sub html_valid_ok {
     my $html_string = shift;
-    my $tidy = HTML::Tidy->new( {} );
-    my $is_tidy = 1;
-    $tidy->parse(q[], $html_string);
-    if (scalar $tidy->messages() > 0) {
-        $is_tidy = 0;
-        carp (join qq[\n], q[HTML::Tidy messages:], $tidy->messages());
+    my $valid = HTML::Valid->new( {} );
+    my $is_valid = 1;
+    my ($output, $errors) = $valid->run($html_string);
+    if (scalar $errors > 0) {
+        $is_valid = 0;
+        carp (join qq[\n], q[HTML::Valid errors:], $errors);
         ## no critic (ProhibitStringySplit)
         my @lines = split qq[\n], $html_string;
         ## use critic
@@ -51,8 +51,7 @@ sub html_tidy_ok {
         foreach my $line (@lines) { $count++; push @counted_lines, "$count: $line"; }
         carp  (join qq[\n], @counted_lines);
     }
-    $tidy->clear_messages();
-    return $is_tidy;
+    return $is_valid;
 }
 
 1;
@@ -76,7 +75,7 @@ __END__
 
 =item Exporter
 
-=item HTML::Tidy
+=item HTML::Valid
 
 =back
 
diff --git a/t/00-critic.t b/t/00-critic.t
index 3d055c3f..655953dc 100644
--- a/t/00-critic.t
+++ b/t/00-critic.t
@@ -17,8 +17,7 @@ if($EVAL_ERROR) {
 } else {
   Test::Perl::Critic->import(
            -severity => 1,
-           -exclude => ['tidy',
-                        'ValuesAndExpressions::ProhibitImplicitNewlines',
+           -exclude => ['ValuesAndExpressions::ProhibitImplicitNewlines',
                         'Documentation::PodSpelling',
                         'RegularExpressions::ProhibitEscapedMetacharacters',
                         'RegularExpressions::ProhibitEnumeratedClasses',
diff --git a/t/10-npg_testing-html.t b/t/10-npg_testing-html.t
index 0f83c924..3acdd222 100644
--- a/t/10-npg_testing-html.t
+++ b/t/10-npg_testing-html.t
@@ -2,8 +2,8 @@ use strict;
 use warnings;
 use Test::More tests => 2;
 
-my @subs = qw(html_tidy_ok);
+my @subs = qw(html_valid_ok);
 use_ok( 'npg_testing::html', @subs);
-can_ok(__PACKAGE__, 'html_tidy_ok');
+can_ok(__PACKAGE__, 'html_valid_ok');
 
-1;
\ No newline at end of file
+1;