diff --git a/app/src/test/java/run/halo/feed/RSS2Test.java b/app/src/test/java/run/halo/feed/RSS2Test.java
index 7804de4..a8773b1 100644
--- a/app/src/test/java/run/halo/feed/RSS2Test.java
+++ b/app/src/test/java/run/halo/feed/RSS2Test.java
@@ -92,6 +92,7 @@ void extractRssTagsTest() {
         var lastBuildDate = RssXmlBuilder.instantToString(instant);
         var rssXml = new RssXmlBuilder()
             .withRss2(rss)
+            .withLastBuildDate(instant)
             .withGenerator("Halo")
             .withExtractRssTags("""
                 <user>