diff --git a/core/src/main/java/hudson/model/UpdateSite.java b/core/src/main/java/hudson/model/UpdateSite.java
index 0e3cc894148a..22764fd403d0 100644
--- a/core/src/main/java/hudson/model/UpdateSite.java
+++ b/core/src/main/java/hudson/model/UpdateSite.java
@@ -217,7 +217,7 @@ public long getDataTimestamp() {
         return updateData(DownloadService.loadJSON(new URL(getUrl() + "?id=" + URLEncoder.encode(getId(), StandardCharsets.UTF_8) + "&version=" + URLEncoder.encode(Jenkins.VERSION, StandardCharsets.UTF_8))), signatureCheck);
     }
 
-    private FormValidation updateData(String json, boolean signatureCheck)
+    protected FormValidation updateData(String json, boolean signatureCheck)
             throws IOException {
 
         dataTimestamp = System.currentTimeMillis();