diff --git a/test/scripts/helpers/open_graph.js b/test/scripts/helpers/open_graph.js
index 725d5c099d..99db154d5c 100644
--- a/test/scripts/helpers/open_graph.js
+++ b/test/scripts/helpers/open_graph.js
@@ -35,6 +35,7 @@ describe('open_graph', () => {
         meta({property: 'og:title', content: hexo.config.title}),
         meta({property: 'og:url'}),
         meta({property: 'og:site_name', content: hexo.config.title}),
+        meta({property: 'og:locale', content: 'en'}),
         meta({property: 'og:updated_time', content: post.updated.toISOString()}),
         meta({name: 'twitter:card', content: 'summary'}),
         meta({name: 'twitter:title', content: hexo.config.title})