diff --git a/common/urltest/urltest.go b/common/urltest/urltest.go
index cfe1e532..2eb0b1f9 100644
--- a/common/urltest/urltest.go
+++ b/common/urltest/urltest.go
@@ -75,7 +75,7 @@ func (s *HistoryStorage) Close() error {
 
 func URLTest(ctx context.Context, link string, detour N.Dialer) (t uint16, err error) {
 	if link == "" {
-		link = "https://www.gstatic.com/generate_204"
+		link = "http://cp.cloudflare.com/generate_204"
 	}
 	linkURL, err := url.Parse(link)
 	if err != nil {
diff --git a/docs/configuration/outbound/urltest.md b/docs/configuration/outbound/urltest.md
index f4b3b0aa..07ddd8ae 100644
--- a/docs/configuration/outbound/urltest.md
+++ b/docs/configuration/outbound/urltest.md
@@ -28,7 +28,7 @@ List of outbound tags to test.
 
 #### url
 
-The URL to test. `https://www.gstatic.com/generate_204` will be used if empty.
+The URL to test. `http://cp.cloudflare.com/generate_204` will be used if empty.
 
 #### interval
 
diff --git a/docs/configuration/outbound/urltest.zh.md b/docs/configuration/outbound/urltest.zh.md
index 4372298a..52929eef 100644
--- a/docs/configuration/outbound/urltest.zh.md
+++ b/docs/configuration/outbound/urltest.zh.md
@@ -28,7 +28,7 @@
 
 #### url
 
-用于测试的链接。默认使用 `https://www.gstatic.com/generate_204`。
+用于测试的链接。默认使用 `http://cp.cloudflare.com/generate_204`。
 
 #### interval