diff --git a/cdn-testlist.txt b/cdn-testlist.txt
index 79ff8e2228..8ac4108b49 100644
--- a/cdn-testlist.txt
+++ b/cdn-testlist.txt
@@ -8,6 +8,7 @@ edge.yunjiasu.com
 googleadservices.com
 ns1.8844dns.com
 ns1.chinanetsun-dns.com
+pagead2.googlesyndication.com
 r1.res.office365.com
 r1.res.outlook.com
 s0.2mdn.net