diff --git a/.github/workflows/build-release.yml b/.github/workflows/build-release.yml
index f20e7fff278e..fd6f38f59bf8 100644
--- a/.github/workflows/build-release.yml
+++ b/.github/workflows/build-release.yml
@@ -104,12 +104,6 @@ jobs:
           default: true
           override: true
 
-      # https://github.com/actions/virtual-environments/issues/2557#issuecomment-769611326
-      - if: ${{ matrix.target }} == 'aarch64-apple-darwin'
-        run: |
-          sudo xcode-select -s /Applications/Xcode_12.4.app &&
-          sudo rm -Rf /Library/Developer/CommandLineTools/SDKs/*
-
       - name: Build release
         shell: bash
         run: |
diff --git a/tests/socks4.rs b/tests/socks4.rs
index dcd60f9559af..cdce51f5dca5 100644
--- a/tests/socks4.rs
+++ b/tests/socks4.rs
@@ -90,9 +90,9 @@ async fn socks4_relay_connect() {
     let svr = Socks4TestServer::new(SERVER_ADDR, LOCAL_ADDR, PASSWORD, METHOD);
     svr.run().await;
 
-    static HTTP_REQUEST: &[u8] = b"GET / HTTP/1.0\r\nHost: www.example.com\r\nAccept: */*\r\n\r\n";
+    static HTTP_REQUEST: &[u8] = b"GET /success.txt HTTP/1.0\r\nHost: detectportal.firefox.com\r\nAccept: */*\r\n\r\n";
 
-    let mut c = Socks4TcpClient::connect(("www.example.com", 80), LOCAL_ADDR, Vec::new())
+    let mut c = Socks4TcpClient::connect(("detectportal.firefox.com", 80), LOCAL_ADDR, Vec::new())
         .await
         .unwrap();
 
diff --git a/tests/socks5.rs b/tests/socks5.rs
index 61abc17f9766..74e6034ef3ff 100644
--- a/tests/socks5.rs
+++ b/tests/socks5.rs
@@ -130,13 +130,13 @@ async fn socks5_relay_aead() {
     svr.run().await;
 
     let mut c = Socks5TcpClient::connect(
-        Address::DomainNameAddress("www.example.com".to_owned(), 80),
+        Address::DomainNameAddress("detectportal.firefox.com".to_owned(), 80),
         svr.client_addr(),
     )
     .await
     .unwrap();
 
-    let req = b"GET / HTTP/1.0\r\nHost: www.example.com\r\nAccept: */*\r\n\r\n";
+    let req = b"GET /success.txt HTTP/1.0\r\nHost: detectportal.firefox.com\r\nAccept: */*\r\n\r\n";
     c.write_all(req).await.unwrap();
     c.flush().await.unwrap();
 
diff --git a/tests/tunnel.rs b/tests/tunnel.rs
index 8f0fe157e1e9..2ad6c045a47a 100644
--- a/tests/tunnel.rs
+++ b/tests/tunnel.rs
@@ -11,8 +11,7 @@ use tokio::{
 
 use shadowsocks_service::{
     config::{Config, ConfigType},
-    run_local,
-    run_server,
+    run_local, run_server,
 };
 
 #[tokio::test]
@@ -26,7 +25,7 @@ async fn tcp_tunnel() {
                     "local_port": 9110,
                     "local_address": "127.0.0.1",
                     "protocol": "tunnel",
-                    "forward_address": "www.example.com",
+                    "forward_address": "detectportal.firefox.com",
                     "forward_port": 80
                 }
             ],
@@ -55,10 +54,10 @@ async fn tcp_tunnel() {
 
     time::sleep(Duration::from_secs(1)).await;
 
-    // Connect it directly, because it is now established a TCP tunnel with www.example.com
+    // Connect it directly, because it is now established a TCP tunnel with detectportal.firefox.com
     let mut stream = TcpStream::connect("127.0.0.1:9110").await.unwrap();
 
-    let req = b"GET / HTTP/1.0\r\nHost: www.example.com\r\nAccept: */*\r\n\r\n";
+    let req = b"GET /success.txt HTTP/1.0\r\nHost: detectportal.firefox.com\r\nAccept: */*\r\n\r\n";
     stream.write_all(req).await.unwrap();
     stream.flush().await.unwrap();