diff --git a/lib/shared/messages/reaction-message-spec.js b/lib/shared/messages/reaction-message-spec.js
--- a/lib/shared/messages/reaction-message-spec.js
+++ b/lib/shared/messages/reaction-message-spec.js
@@ -239,4 +239,19 @@
     }
     return originalMessage.creatorID === params.viewerID;
   },
+
+  getLastUpdatedTime: async (
+    messageInfo: ReactionMessageInfo | RawReactionMessageInfo,
+    params: ShowInMessagePreviewParams,
+  ) => {
+    const originalMessage = await params.fetchMessage(
+      messageInfo.targetMessageID,
+    );
+    if (!originalMessage) {
+      return null;
+    }
+    return originalMessage.creatorID === params.viewerID
+      ? messageInfo.time
+      : null;
+  },
 });