diff --git a/test/utils/fixtures/themes/README.md b/test/utils/fixtures/themes/README.md
index 24c966d3ae..ed6fc00b16 100644
--- a/test/utils/fixtures/themes/README.md
+++ b/test/utils/fixtures/themes/README.md
@@ -6,9 +6,20 @@ These files are used throughout our tests to mock themes in various states.
 The casper fixture is a partial copy of the content/themes/casper folder.
 It should not include any files that aren't needed to run the theme.
 
-To update it, make sure you are in side this folder (the fixtures/themes directory) and run:
+To update it:
 
-`rsync -rv --exclude '.git*' --exclude 'assets/css*' --exclude 'assets/js*' --exclude 'gulpfile.js' --exclude 'yarn.lock' --exlcude 'README.md' ../../../../content/themes/casper .`
+1. Ensure your `content/themes/casper` folder is on the latest released version e.g.
+
+- Run `yarn main`
+- `cd content/themes/casper`
+- `git log -20` - find the latest tag
+- `git checkout vx.y.z` - checkout the latest tag
+
+2. Ensure you are in side this folder (the fixtures/themes directory), remove casper entirely and then copy it across fresh:
+
+- `cd tests/utils/fixtures/themes`
+- `rm -rf casper`
+- `rsync -rv --exclude '.git*' --exclude 'assets/css*' --exclude 'assets/js*' --exclude 'gulpfile.js' --exclude 'yarn.lock' --exclude 'README.md' ../../../../content/themes/casper .`
 
 ### Modifying theme fixtures
 When a new rule is introduced in gscan one of these fixture files might break and you'll have to update a "zip" which isn't as easy as opening a text editor... It could become that one day but for now here are some commands to help out with the edit process
diff --git a/test/utils/fixtures/themes/casper/assets/screenshot-desktop.jpg b/test/utils/fixtures/themes/casper/assets/screenshot-desktop.jpg
old mode 100644
new mode 100755
diff --git a/test/utils/fixtures/themes/casper/assets/screenshot-mobile.jpg b/test/utils/fixtures/themes/casper/assets/screenshot-mobile.jpg
old mode 100644
new mode 100755
diff --git a/test/utils/fixtures/themes/casper/partials/byline-multiple.hbs b/test/utils/fixtures/themes/casper/partials/byline-multiple.hbs
deleted file mode 100644
index e1c9d159e6..0000000000
--- a/test/utils/fixtures/themes/casper/partials/byline-multiple.hbs
+++ /dev/null
@@ -1,72 +0,0 @@
-<section class="post-full-authors">
-
-    <div class="post-full-authors-content">
-        <p>This post was a collaboration between</p>
-        <p>{{authors}}</p>
-    </div>
-
-    <ul class="author-list">
-    {{#foreach authors}}
-        <li class="author-list-item">
-
-            <div class="author-card">
-                <div class="basic-info">
-                    {{#if profile_image}}
-                        <img class="author-profile-image" src="{{profile_image}}" alt="{{name}}" />
-                    {{else}}
-                        <div class="author-profile-image">{{> "icons/avatar"}}</div>
-                    {{/if}}
-                    <h2>{{name}}</h2>
-                </div>
-                <div class="bio">
-                    {{#if bio}}
-                        <p>{{bio}}</p>
-                        <p><a href="{{url}}">More posts</a> by {{name}}.</p>
-                    {{else}}
-                        <p>Read <a href="{{url}}">more posts</a> by this author.</p>
-                    {{/if}}
-                </div>
-            </div>
-
-            {{#if profile_image}}
-                <a href="{{url}}" class="moving-avatar"><img class="author-profile-image" src="{{profile_image}}" alt="{{name}}" /></a>
-            {{else}}
-                <a href="{{url}}" class="moving-avatar author-profile-image">{{> "icons/avatar"}}</a>
-            {{/if}}
-
-        </li>
-    {{/foreach}}
-
-    </ul>
-
-</section>
-
-{{#contentFor "scripts"}}
-<script>
-// Adds delay to author card dropups to disappear. This gives enough
-// time for the user to interact with the author card while they move
-// the mouse from the avatar to the card. Also makes space for the
-// interacted avatar.
-$(document).ready(function () {
-
-    var hoverTimeout;
-
-    $('.author-list-item').hover(function(){
-        var $this = $(this);
-
-        clearTimeout(hoverTimeout);
-
-        $('.author-card').removeClass('hovered');
-        $(this).children('.author-card').addClass('hovered');
-
-    }, function() {
-        var $this = $(this);
-
-        hoverTimeout = setTimeout(function() {
-            $this.children('.author-card').removeClass('hovered');
-        }, 800);
-    });
-
-});
-</script>
-{{/contentFor}}
diff --git a/test/utils/fixtures/themes/casper/partials/byline-single.hbs b/test/utils/fixtures/themes/casper/partials/byline-single.hbs
deleted file mode 100644
index c888773f5b..0000000000
--- a/test/utils/fixtures/themes/casper/partials/byline-single.hbs
+++ /dev/null
@@ -1,23 +0,0 @@
-{{!-- Everything inside the #author tags pulls data from the author --}}
-{{#primary_author}}
-
-<section class="author-card">
-    {{#if profile_image}}
-        <img class="author-profile-image" src="{{profile_image}}" alt="{{name}}" />
-    {{else}}
-        <span class="avatar-wrapper">{{> "icons/avatar"}}</span>
-    {{/if}}
-    <section class="author-card-content">
-        <h4 class="author-card-name"><a href="{{url}}">{{name}}</a></h4>
-        {{#if bio}}
-            <p>{{bio}}</p>
-        {{else}}
-            <p>Read <a href="{{url}}">more posts</a> by this author.</p>
-        {{/if}}
-    </section>
-</section>
-<div class="post-full-footer-right">
-    <a class="author-card-button" href="{{url}}">Read More</a>
-</div>
-
-{{/primary_author}}
diff --git a/test/utils/fixtures/themes/casper/partials/floating-header.hbs b/test/utils/fixtures/themes/casper/partials/floating-header.hbs
deleted file mode 100644
index 3ceb8fc769..0000000000
--- a/test/utils/fixtures/themes/casper/partials/floating-header.hbs
+++ /dev/null
@@ -1,28 +0,0 @@
-<div class="floating-header">
-    <div class="floating-header-logo">
-        <a href="{{@blog.url}}">
-            {{#if @blog.icon}}
-                <img src="{{@blog.icon}}" alt="{{@blog.title}} icon" />
-            {{/if}}
-            <span>{{@blog.title}}</span>
-        </a>
-    </div>
-    <span class="floating-header-divider">&mdash;</span>
-    <div class="floating-header-title">{{title}}</div>
-    <div class="floating-header-share">
-        <div class="floating-header-share-label">Share this {{> "icons/point"}}</div>
-        <a class="floating-header-share-tw" href="https://twitter.com/share?text={{encode title}}&amp;url={{url absolute="true"}}"
-            onclick="window.open(this.href, 'share-twitter', 'width=550,height=235');return false;">
-            {{> "icons/twitter"}}
-        </a>
-        <a class="floating-header-share-fb" href="https://www.facebook.com/sharer/sharer.php?u={{url absolute="true"}}"
-            onclick="window.open(this.href, 'share-facebook','width=580,height=296');return false;">
-            {{> "icons/facebook"}}
-        </a>
-    </div>
-    <progress id="reading-progress" class="progress" value="0">
-        <div class="progress-container">
-            <span class="progress-bar"></span>
-        </div>
-    </progress>
-</div>
diff --git a/test/utils/fixtures/themes/casper/partials/icons/ghost-logo.hbs b/test/utils/fixtures/themes/casper/partials/icons/ghost-logo.hbs
deleted file mode 100644
index 637a2b5bea..0000000000
--- a/test/utils/fixtures/themes/casper/partials/icons/ghost-logo.hbs
+++ /dev/null
@@ -1 +0,0 @@
-<svg class="ghost-svg" viewBox="0 0 493 161" xmlns="http://www.w3.org/2000/svg"><title>Ghost Logo</title><g fill="none" fill-rule="evenodd"><path d="M328.52 37.36c-27.017 0-40.97 19.323-40.97 43.16 0 23.837 13.61 43.162 40.97 43.162s40.968-19.325 40.968-43.163c0-23.84-13.954-43.16-40.97-43.16zm20.438 43.237c-.02 15.328-5.126 27.743-20.44 27.743-15.312 0-20.42-12.414-20.435-27.743v-.078c.016-15.33 5.124-27.74 20.437-27.74 15.312 0 20.42 12.41 20.438 27.74v.07zM207.553 5.19c0-1.103.885-2.124 1.984-2.282 0 0 13.577-1.95 14.784-2.115 1.37-.187 3.19.798 3.19 2.744v44.236c3.23-3.105 6.79-5.608 10.66-7.515 3.88-1.906 8.43-2.86 13.66-2.86 4.53 0 8.53.776 12.03 2.33 3.5 1.55 6.43 3.73 8.77 6.533 2.34 2.81 4.12 6.16 5.33 10.05 1.21 3.9 1.82 8.19 1.82 12.87v51.35c0 1.1-.89 2-2 2h-15.95c-1.1 0-2-.9-2-1.99V69.18c0-5.118-1.17-9.08-3.51-11.888-2.35-2.804-5.86-4.207-10.544-4.207-3.45 0-6.677.79-9.69 2.37-3.02 1.58-5.87 3.73-8.564 6.46v58.617c0 1.102-.894 2-2.002 2h-15.94c-1.11 0-2.005-.895-2.005-2V5.188zm244.007 95.327v-43.68h-13.482c-1.1 0-1.742-.87-1.443-1.916l3-10.49c.262-.9.942-1.87 2.308-2.07l9.597-1.35 3.508-23.49c.163-1.09 1.18-2.1 2.274-2.26 0 0 9.192-1.31 10.963-1.58 1.673-.25 3.19.97 3.19 2.81v24.52h17.565c1.106 0 2.002.9 2.002 2.01v11.82c0 1.11-.89 2.01-2.002 2.01h-17.566v43.08c0 6.02 3.623 8.32 7.095 8.32 2.12 0 5.02-1.14 7.19-2.16 1.34-.62 3.41-.16 3.95 1.73l2.45 8.65c.3 1.07-.25 2.37-1.23 2.86 0 0-7.29 4.37-17.06 4.37-13.73 0-22.33-8.08-22.33-23.16zm-44.584-47.74c-7.084 0-12.657 2.476-12.657 8.433 0 7.44 12.01 9.606 20.23 12.64 5.49 2.027 20.24 5.98 20.24 22.016 0 19.48-16 27.807-33.06 27.807-17.06 0-25.4-5.465-25.4-5.465-.96-.527-1.5-1.822-1.2-2.89 0 0 2.1-7.52 2.64-9.386.48-1.68 2.41-2.27 3.64-1.792 4.39 1.712 12.32 4.092 21.28 4.092 9.07 0 13.46-2.803 13.46-8.777 0-7.95-12.26-10.38-20.36-12.967-5.59-1.78-20.36-5.93-20.36-23.566 0-17.373 15.08-25.524 31.2-25.524 13.64 0 23.5 4.69 23.5 4.69 1.01.427 1.58 1.635 1.28 2.698l-2.658 9.357c-.488 1.74-1.898 2.537-3.666 1.957-3.89-1.277-11.2-3.322-18.15-3.322zm-210.313-15.28c-6.695.775-11.472 3.962-14.562 6.93-6.06-4.81-14.49-7.106-23.94-7.106-18.95 0-33.76 9.26-33.76 29.43 0 11.58 4.88 19.56 12.62 24.26-5.75 2.75-9.57 8.59-9.57 14.34 0 9.61 7.5 12.61 7.5 12.61s-13.11 6.44-13.11 19.32c0 16.49 15.01 23.16 33.34 23.16 26.43 0 44.61-11.04 44.61-31.31 0-12.47-9.44-19.36-30.01-20.18-12.2-.48-20.11-.93-22.07-1.58-2.59-.87-3.86-2.96-3.86-5.28 0-2.55 2.08-4.98 5.35-6.65 2.86.516 5.87.768 8.99.768 18.97 0 33.76-9.223 33.76-29.425 0-4.897-.87-9.15-2.46-12.78 2.79-1.506 8.34-2.25 8.34-2.25 1.09-.17 1.975-1.21 1.974-2.31V40.3c0-1.88-1.59-2.955-3.1-2.78zm-49.13 85.132s9.954.38 19.9.84c11.172.52 14.654 2.96 14.654 8.81 0 7.15-9.71 14.1-23.28 14.1-12.88 0-19.314-4.54-19.314-12.08 0-4.33 2.26-9.18 8.04-11.69zm10.66-40.54c-8.978 0-15.983-4.83-15.983-15.35 0-10.53 7.01-15.35 15.983-15.35 8.974 0 15.984 4.81 15.984 15.34 0 10.53-7.002 15.34-15.984 15.34z" fill="#2D3134"/><g opacity=".6" transform="translate(0 36)" fill="#2E3134"><rect x=".209" y="69.017" width="33.643" height="17.014" rx="4"/><rect x="50.672" y="69.017" width="33.622" height="17.014" rx="4"/><rect x=".184" y="34.99" width="84.121" height="17.014" rx="4"/><rect x=".209" y=".964" width="50.469" height="17.013" rx="4"/><rect x="67.494" y=".964" width="16.821" height="17.013" rx="4"/></g></g></svg>
diff --git a/test/utils/fixtures/themes/casper/partials/icons/infinity.hbs b/test/utils/fixtures/themes/casper/partials/icons/infinity.hbs
deleted file mode 100644
index 87e44eaae1..0000000000
--- a/test/utils/fixtures/themes/casper/partials/icons/infinity.hbs
+++ /dev/null
@@ -1 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M13 14.5s2 3 5 3 5.5-2.463 5.5-5.5S21 6.5 18 6.5c-5 0-7 11-12 11C2.962 17.5.5 15.037.5 12S3 6.5 6 6.5s4.5 3.5 4.5 3.5"/></svg>
diff --git a/test/utils/fixtures/themes/casper/partials/icons/location.hbs b/test/utils/fixtures/themes/casper/partials/icons/location.hbs
deleted file mode 100644
index 0c2d86661e..0000000000
--- a/test/utils/fixtures/themes/casper/partials/icons/location.hbs
+++ /dev/null
@@ -1 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" stroke="#000" stroke-linecap="round" stroke-linejoin="round" stroke-miterlimit="10" fill="none"><path d="M19.5 8c0 4.144-7.5 15.5-7.5 15.5S4.5 12.144 4.5 8C4.5 3.858 7.857.5 12 .5c4.142 0 7.5 3.358 7.5 7.5z"/><circle cx="12" cy="8" r="3"/></svg>
diff --git a/test/utils/fixtures/themes/casper/partials/icons/point.hbs b/test/utils/fixtures/themes/casper/partials/icons/point.hbs
deleted file mode 100644
index f3c702574a..0000000000
--- a/test/utils/fixtures/themes/casper/partials/icons/point.hbs
+++ /dev/null
@@ -1,3 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">
-    <path d="M7.5 15.5V4a1.5 1.5 0 1 1 3 0v4.5h2a1 1 0 0 1 1 1h2a1 1 0 0 1 1 1H18a1.5 1.5 0 0 1 1.5 1.5v3.099c0 .929-.13 1.854-.385 2.748L17.5 23.5h-9c-1.5-2-5.417-8.673-5.417-8.673a1.2 1.2 0 0 1 1.76-1.605L7.5 15.5zm6-6v2m-3-3.5v3.5m6-1v2"/>
-</svg>
diff --git a/test/utils/fixtures/themes/casper/partials/icons/website.hbs b/test/utils/fixtures/themes/casper/partials/icons/website.hbs
deleted file mode 100644
index 08be39fa02..0000000000
--- a/test/utils/fixtures/themes/casper/partials/icons/website.hbs
+++ /dev/null
@@ -1 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M23.5 11.957c0 6.375-5.163 11.544-11.532 11.544C5.599 23.5.5 18.125.5 11.75.5 5.542 5.37.758 11.505.511l.5-.011C18.374.5 23.5 5.582 23.5 11.957zM11.505.511c-6 6.5-6 14.98 0 22.98m1-22.98c6 6.5 6 14.977 0 22.977M2 17.479h20.063m-19.657-12h19.062m-20.968 6h22.938" stroke="#000" stroke-linejoin="round" stroke-miterlimit="10" fill="none"/></svg>
diff --git a/test/utils/fixtures/themes/casper/partials/site-nav.hbs b/test/utils/fixtures/themes/casper/partials/site-nav.hbs
deleted file mode 100644
index b2e66abff8..0000000000
--- a/test/utils/fixtures/themes/casper/partials/site-nav.hbs
+++ /dev/null
@@ -1,29 +0,0 @@
-<nav class="site-nav">
-    <div class="site-nav-left">
-        {{^is "home"}}
-            {{#if @blog.logo}}
-                <a class="site-nav-logo" href="{{@blog.url}}"><img src="{{@blog.logo}}" alt="{{@blog.title}}" /></a>
-            {{else}}
-                <a class="site-nav-logo" href="{{@blog.url}}">{{@blog.title}}</a>
-            {{/if}}
-        {{/is}}
-        {{#if @blog.navigation}}
-            {{navigation}}
-        {{/if}}
-    </div>
-    <div class="site-nav-right">
-        <div class="social-links">
-            {{#if @blog.facebook}}
-                <a class="social-link social-link-fb" href="{{facebook_url @blog.facebook}}" target="_blank" rel="noopener">{{> "icons/facebook"}}</a>
-            {{/if}}
-            {{#if @blog.twitter}}
-                <a class="social-link social-link-tw" href="{{twitter_url @blog.twitter}}" target="_blank" rel="noopener">{{> "icons/twitter"}}</a>
-            {{/if}}
-        </div>
-        {{#if @labs.subscribers}}
-            <a class="subscribe-button" href="#subscribe">Subscribe</a>
-        {{else}}
-            <a class="rss-button" href="https://feedly.com/i/subscription/feed/{{@blog.url}}/rss/" target="_blank" rel="noopener">{{> "icons/rss"}}</a>
-        {{/if}}
-    </div>
-</nav>