diff --git a/lib/unfurl-shortcode.js b/lib/unfurl-shortcode.js
index ff8ba93..e9f6dea 100644
--- a/lib/unfurl-shortcode.js
+++ b/lib/unfurl-shortcode.js
@@ -76,7 +76,7 @@ export function escapeHtml(str) {
 
 export function renderFallbackLink(url) {
   const domain = escapeHtml(extractDomain(url));
-  return `<a href="${escapeHtml(url)}" rel="noopener" target="_blank">${domain}</a>`;
+  return `<a href="${escapeHtml(url)}" rel="noopener" target="_blank" class="unfurl-fallback">${domain}</a>`;
 }
 
 export function renderCard(url, metadata) {