diff --git a/src/activitypub/mocks.js b/src/activitypub/mocks.js
index 3e8d6424c4..6304c26daa 100644
--- a/src/activitypub/mocks.js
+++ b/src/activitypub/mocks.js
@@ -123,8 +123,12 @@ Mocks.post = async (objects) => {
 		let edited = new Date(updated);
 		edited = Number.isNaN(edited.valueOf()) ? undefined : edited;
 
-		content = sanitize(content, sanitizeConfig);
-		content = await activitypub.helpers.remoteAnchorToLocalProfile(content);
+		if (content && content.length) {
+			content = sanitize(content, sanitizeConfig);
+			content = await activitypub.helpers.remoteAnchorToLocalProfile(content);
+		} else {
+			content = '<em>This post did not contain any content.</em>';
+		}
 
 		const payload = {
 			uid,