diff --git a/_includes/blocks/tabs.html b/_includes/blocks/tabs.html
index fa2feb7..09975fa 100644
--- a/_includes/blocks/tabs.html
+++ b/_includes/blocks/tabs.html
@@ -3,7 +3,7 @@
     <ul>
       {% for tab in include.tabs %}
       <li class="tab" id="{{ tab.label | slugify }}-heading" onclick="openTab('{{ tab.label | slugify }}')">
-        <h3><a>{{ tab.label }}</a></h3>
+        <h3><span>{{ tab.label }}</span></h3>
       </li>
       {% endfor %}
     </ul>
diff --git a/_includes/head.html b/_includes/head.html
index 6e3d523..b808d13 100644
--- a/_includes/head.html
+++ b/_includes/head.html
@@ -24,7 +24,7 @@
     {%- include misc/google-analytics.html -%}
   {%- endif -%}
 
-  {% if page.hero.image %}
+  {% if page.hero.image and page.hero.image != "" %}
   <link rel="preload" as="image" href="{{ page.hero.image | absolute_url }}">
   {% endif %}
 
diff --git a/_layouts/default.html b/_layouts/default.html
index c5a9d1d..f5d7263 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -18,7 +18,7 @@
     </section>
     {%- include footer.html -%}
     <script src="https://code.jquery.com/jquery-3.6.0.min.js" integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4=" crossorigin="anonymous"></script>
-    <script type="text/javascript" src="//cdn.jsdelivr.net/npm/slick-carousel@1.8.1/slick/slick.min.js"></script>
+    <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/slick-carousel@1.8.1/slick/slick.min.js"></script>
     <script src="https://kit.fontawesome.com/2c3e99340f.js" crossorigin="anonymous"></script>
     <script type="text/javascript" src="{{ 'assets/js/carouselInit.js' | absolute_url }}"></script>
 
diff --git a/lib/tasks/test.rake b/lib/tasks/test.rake
index 141470c..8da90f8 100644
--- a/lib/tasks/test.rake
+++ b/lib/tasks/test.rake
@@ -1,16 +1,10 @@
 require 'iiifc'
 
 namespace :test do
-  desc 'Check html'
+  desc 'Check Images and Scripts'
   task :html do
     opts = {
-      check_html: true,
-      assume_extension: true,
-      validation: {
-        report_mismatched_tags: true,
-        report_invalid_tags: true
-      },
-      checks_to_ignore: ['LinkCheck']
+      checks: ['Images', 'Scripts']
     }
     HTMLProofer.check_directory(SITE_DIR, opts).run
   end
@@ -20,33 +14,35 @@ namespace :test do
     task :internal do
       puts 'Checking for internal link errors'
       opts = {
-        checks_to_ignore: ['ImageCheck', 'HtmlCheck', 'ScriptCheck'],
+        checks: ['Links'],
         disable_external: true,
-        internal_domains: ['localhost:4000']
+        enforce_https: false,
+        internal_domains: ['localhost:4000'],
       }
       HTMLProofer.check_directory(SITE_DIR, opts).run
     end
 
-    desc 'Check for *iiif.io* link errors'
-    task :iiif do
-      puts 'Checking for link errors in *iiif.io* sites'
+
+    desc 'Check for external link rot'
+    task :external do
+      puts 'Checking for external link errors'
       opts = {
-        checks_to_ignore: ['ImageCheck', 'HtmlCheck', 'ScriptCheck'],
-        url_ignore: [/^((?!iiif\.io).)*$/, 'github'] # temporarily ignore iiif.io github repo errors
+        enforce_https: false,
+        ignore_status_codes: [429],
+        only_4xx: true,
+        checks: ['Links','Images'],
+        url_ignore: [/.*iiif\.io.*/],
+        ignore_files: [/.*news\/.*/]
       }
       HTMLProofer.check_directory(SITE_DIR, opts).run
     end
 
-    desc 'Check for external link rot'
-    task :external do
-      puts 'Checking for external link errors'
+    desc 'Check for https link errors'
+    task :https do
+      puts 'Checking for https link errors'
       opts = {
-        external_only: true,
-        http_status_ignore: [429],
         enforce_https: true,
-        only_4xx: true,
-        checks_to_ignore: ['ImageCheck', 'HtmlCheck', 'ScriptCheck'],
-        url_ignore: [/.*iiif\.io.*/]
+        checks: ['Links','Images'],
       }
       HTMLProofer.check_directory(SITE_DIR, opts).run
     end