diff --git a/ghost/admin/app/components/editor/modals/preview/email.hbs b/ghost/admin/app/components/editor/modals/preview/email.hbs
index 20a22946af..bc3b2222de 100644
--- a/ghost/admin/app/components/editor/modals/preview/email.hbs
+++ b/ghost/admin/app/components/editor/modals/preview/email.hbs
@@ -64,7 +64,7 @@
             @buttonText="Send test email"
             @successText="Sent"
             @runningText="Sending..."
-            @class="gh-btn gh-btn-green gh-btn-icon gh-post-preview-email-trigger"
+            @class="gh-btn gh-btn-icon gh-post-preview-email-trigger"
         />
     </div>
 </div>
diff --git a/ghost/admin/app/styles/layouts/post-preview.css b/ghost/admin/app/styles/layouts/post-preview.css
index 0a89b54547..b74c5f5969 100644
--- a/ghost/admin/app/styles/layouts/post-preview.css
+++ b/ghost/admin/app/styles/layouts/post-preview.css
@@ -256,6 +256,11 @@
 .gh-post-preview-email-input {
     border-top-right-radius: 0;
     border-bottom-right-radius: 0;
+    border-right-width: 0;
+}
+
+.gh-post-preview-email-input:focus {
+    border-right-width: 1px;
 }
 
 .gh-post-preview-email-trigger,