diff --git a/src-tauri/src/proxy_manager.rs b/src-tauri/src/proxy_manager.rs
index 0462e00..05c24b5 100644
--- a/src-tauri/src/proxy_manager.rs
+++ b/src-tauri/src/proxy_manager.rs
@@ -928,19 +928,33 @@ impl ProxyManager {
     url
   }
 
-  // Check if a proxy is valid by making HTTP requests through it
+  // Check if a proxy is valid by routing through a temporary local donut-proxy.
+  // This tests the exact same code path the browser uses, ensuring that if the
+  // check passes, the browser connection will work too.
   pub async fn check_proxy_validity(
     &self,
     proxy_id: &str,
     proxy_settings: &ProxySettings,
   ) -> Result<ProxyCheckResult, String> {
-    let proxy_url = Self::build_proxy_url(proxy_settings);
+    let upstream_url = Self::build_proxy_url(proxy_settings);
 
-    // Fetch public IP through the proxy using shared IP utilities
-    let ip = match ip_utils::fetch_public_ip(Some(&proxy_url)).await {
+    // Start a temporary local proxy that tunnels through the upstream
+    let proxy_config = crate::proxy_runner::start_proxy_process(Some(upstream_url), None)
+      .await
+      .map_err(|e| format!("Failed to start test proxy: {e}"))?;
+
+    let local_url = format!("http://127.0.0.1:{}", proxy_config.local_port.unwrap_or(0));
+    let proxy_id_clone = proxy_config.id.clone();
+
+    // Fetch public IP through the local proxy (same path the browser uses)
+    let ip_result = ip_utils::fetch_public_ip(Some(&local_url)).await;
+
+    // Stop the temporary proxy regardless of result
+    let _ = crate::proxy_runner::stop_proxy_process(&proxy_id_clone).await;
+
+    let ip = match ip_result {
       Ok(ip) => ip,
       Err(e) => {
-        // Save failed check result
         let failed_result = ProxyCheckResult {
           ip: String::new(),
           city: None,
@@ -1054,9 +1068,10 @@ impl ProxyManager {
     let proxy_type = obj
       .get("type")
       .or_else(|| obj.get("proxy_type"))
+      .or_else(|| obj.get("protocol"))
       .and_then(|v| v.as_str())
       .unwrap_or("http")
-      .to_string();
+      .to_lowercase();
 
     let username = obj
       .get("username")
@@ -3437,6 +3452,22 @@ mod tests {
     let body2 = r#"{"ip": "1.2.3.4", "port": 1080, "proxy_type": "socks4"}"#;
     let result2 = ProxyManager::parse_dynamic_proxy_json(body2).unwrap();
     assert_eq!(result2.proxy_type, "socks4");
+
+    // "protocol" field alias
+    let body3 = r#"{"ip": "1.2.3.4", "port": 1080, "protocol": "socks5"}"#;
+    let result3 = ProxyManager::parse_dynamic_proxy_json(body3).unwrap();
+    assert_eq!(result3.proxy_type, "socks5");
+  }
+
+  #[test]
+  fn test_parse_dynamic_proxy_json_normalizes_case() {
+    let body = r#"{"ip": "1.2.3.4", "port": 1080, "type": "SOCKS5"}"#;
+    let result = ProxyManager::parse_dynamic_proxy_json(body).unwrap();
+    assert_eq!(result.proxy_type, "socks5");
+
+    let body2 = r#"{"ip": "1.2.3.4", "port": 8080, "protocol": "HTTP"}"#;
+    let result2 = ProxyManager::parse_dynamic_proxy_json(body2).unwrap();
+    assert_eq!(result2.proxy_type, "http");
   }
 
   #[test]
diff --git a/src-tauri/src/proxy_server.rs b/src-tauri/src/proxy_server.rs
index aa89cfe..0a05006 100644
--- a/src-tauri/src/proxy_server.rs
+++ b/src-tauri/src/proxy_server.rs
@@ -1062,131 +1062,143 @@ pub async fn run_proxy_server(config: ProxyConfig) -> Result<(), Box<dyn std::er
         let matcher = bypass_matcher.clone();
 
         tokio::task::spawn(async move {
-          // Read first bytes to detect CONNECT requests
-          // CONNECT requests need special handling for tunneling
-          // Use a larger buffer to ensure we can detect CONNECT even with partial reads
+          // Peek at first bytes to detect CONNECT requests.
+          // Use peek() first to wait for data without consuming it, avoiding race
+          // conditions where read() returns 0 on a fresh connection.
           let mut peek_buffer = [0u8; 16];
-          match stream.read(&mut peek_buffer).await {
-            Ok(0) => {
-              log::error!("DEBUG: Connection closed immediately (0 bytes read)");
+
+          let peek_n = match tokio::time::timeout(
+            tokio::time::Duration::from_secs(30),
+            stream.peek(&mut peek_buffer),
+          )
+          .await
+          {
+            Ok(Ok(n)) if n > 0 => n,
+            _ => {
+              log::error!("DEBUG: Connection closed or timed out before receiving data");
+              return;
             }
-            Ok(n) => {
-              // Check if this looks like a CONNECT request
-              // Be more lenient - check if the first bytes match "CONNECT" (case-insensitive)
-              let request_start_upper =
-                String::from_utf8_lossy(&peek_buffer[..n.min(7)]).to_uppercase();
-              let is_connect = request_start_upper.starts_with("CONNECT");
+          };
 
-              log::error!(
-                "DEBUG: Read {} bytes, starts with: {:?}, is_connect: {}",
-                n,
-                String::from_utf8_lossy(&peek_buffer[..n.min(20)]),
-                is_connect
-              );
+          // Now consume the peeked bytes
+          let n = match stream.read(&mut peek_buffer[..peek_n]).await {
+            Ok(n) if n > 0 => n,
+            _ => return,
+          };
 
-              if is_connect {
-                // Handle CONNECT request manually for tunneling
-                let mut full_request = Vec::with_capacity(4096);
-                full_request.extend_from_slice(&peek_buffer[..n]);
+          {
+            // Check if this looks like a CONNECT request
+            // Be more lenient - check if the first bytes match "CONNECT" (case-insensitive)
+            let request_start_upper =
+              String::from_utf8_lossy(&peek_buffer[..n.min(7)]).to_uppercase();
+            let is_connect = request_start_upper.starts_with("CONNECT");
 
-                // Read the rest of the CONNECT request until we have the full headers
-                // CONNECT requests end with \r\n\r\n (or \n\n)
-                let mut remaining = [0u8; 4096];
-                let mut total_read = n;
-                let max_reads = 100; // Prevent infinite loop
-                let mut reads = 0;
+            log::error!(
+              "DEBUG: Read {} bytes, starts with: {:?}, is_connect: {}",
+              n,
+              String::from_utf8_lossy(&peek_buffer[..n.min(20)]),
+              is_connect
+            );
 
-                loop {
-                  if reads >= max_reads {
-                    log::error!("DEBUG: Max reads reached, breaking");
-                    break;
-                  }
+            if is_connect {
+              // Handle CONNECT request manually for tunneling
+              let mut full_request = Vec::with_capacity(4096);
+              full_request.extend_from_slice(&peek_buffer[..n]);
 
-                  match stream.read(&mut remaining).await {
-                    Ok(0) => {
-                      // Connection closed, but we might have a complete request
-                      if full_request.ends_with(b"\r\n\r\n") || full_request.ends_with(b"\n\n") {
-                        break;
-                      }
-                      // If we have some data, try to process it anyway
-                      if total_read > 0 {
-                        break;
-                      }
-                      return; // No data at all
+              // Read the rest of the CONNECT request until we have the full headers
+              // CONNECT requests end with \r\n\r\n (or \n\n)
+              let mut remaining = [0u8; 4096];
+              let mut total_read = n;
+              let max_reads = 100; // Prevent infinite loop
+              let mut reads = 0;
+
+              loop {
+                if reads >= max_reads {
+                  log::error!("DEBUG: Max reads reached, breaking");
+                  break;
+                }
+
+                match stream.read(&mut remaining).await {
+                  Ok(0) => {
+                    // Connection closed, but we might have a complete request
+                    if full_request.ends_with(b"\r\n\r\n") || full_request.ends_with(b"\n\n") {
+                      break;
                     }
-                    Ok(m) => {
-                      reads += 1;
-                      total_read += m;
-                      full_request.extend_from_slice(&remaining[..m]);
+                    // If we have some data, try to process it anyway
+                    if total_read > 0 {
+                      break;
+                    }
+                    return; // No data at all
+                  }
+                  Ok(m) => {
+                    reads += 1;
+                    total_read += m;
+                    full_request.extend_from_slice(&remaining[..m]);
 
-                      // Check if we have complete headers
-                      if full_request.ends_with(b"\r\n\r\n") || full_request.ends_with(b"\n\n") {
-                        break;
-                      }
+                    // Check if we have complete headers
+                    if full_request.ends_with(b"\r\n\r\n") || full_request.ends_with(b"\n\n") {
+                      break;
+                    }
 
-                      // Also check if we have enough to parse (at least "CONNECT host:port HTTP/1.x")
-                      if total_read >= 20 {
-                        // Check if we have a newline that might indicate end of request line
-                        if let Some(pos) = full_request.iter().position(|&b| b == b'\n') {
-                          if pos < full_request.len() - 1 {
-                            // We have at least the request line, check if we have headers
-                            let request_str = String::from_utf8_lossy(&full_request);
-                            if request_str.contains("\r\n\r\n") || request_str.contains("\n\n") {
-                              break;
-                            }
+                    // Also check if we have enough to parse (at least "CONNECT host:port HTTP/1.x")
+                    if total_read >= 20 {
+                      // Check if we have a newline that might indicate end of request line
+                      if let Some(pos) = full_request.iter().position(|&b| b == b'\n') {
+                        if pos < full_request.len() - 1 {
+                          // We have at least the request line, check if we have headers
+                          let request_str = String::from_utf8_lossy(&full_request);
+                          if request_str.contains("\r\n\r\n") || request_str.contains("\n\n") {
+                            break;
                           }
                         }
                       }
                     }
-                    Err(e) => {
-                      log::error!("DEBUG: Error reading CONNECT request: {:?}", e);
-                      // If we have some data, try to process it
-                      if total_read > 0 {
-                        break;
-                      }
-                      return;
+                  }
+                  Err(e) => {
+                    log::error!("DEBUG: Error reading CONNECT request: {:?}", e);
+                    // If we have some data, try to process it
+                    if total_read > 0 {
+                      break;
                     }
+                    return;
                   }
                 }
-
-                // Handle CONNECT manually
-                log::error!(
-                  "DEBUG: Handling CONNECT manually for: {}",
-                  String::from_utf8_lossy(&full_request[..full_request.len().min(200)])
-                );
-                if let Err(e) =
-                  handle_connect_from_buffer(stream, full_request, upstream, matcher).await
-                {
-                  log::error!("Error handling CONNECT request: {:?}", e);
-                } else {
-                  log::error!("DEBUG: CONNECT handled successfully");
-                }
-                return;
               }
 
-              // Not CONNECT (or partial read) - reconstruct stream with consumed bytes prepended
-              // This is critical: we MUST prepend any bytes we consumed, even if < 7 bytes
+              // Handle CONNECT manually
               log::error!(
-                "DEBUG: Non-CONNECT request, first {} bytes: {:?}",
-                n,
-                String::from_utf8_lossy(&peek_buffer[..n.min(50)])
+                "DEBUG: Handling CONNECT manually for: {}",
+                String::from_utf8_lossy(&full_request[..full_request.len().min(200)])
               );
-              let prepended_bytes = peek_buffer[..n].to_vec();
-              let prepended_reader = PrependReader {
-                prepended: prepended_bytes,
-                prepended_pos: 0,
-                inner: stream,
-              };
-              let io = TokioIo::new(prepended_reader);
-              let service =
-                service_fn(move |req| handle_request(req, upstream.clone(), matcher.clone()));
-
-              if let Err(err) = http1::Builder::new().serve_connection(io, service).await {
-                log::error!("Error serving connection: {:?}", err);
+              if let Err(e) =
+                handle_connect_from_buffer(stream, full_request, upstream, matcher).await
+              {
+                log::error!("Error handling CONNECT request: {:?}", e);
+              } else {
+                log::error!("DEBUG: CONNECT handled successfully");
               }
+              return;
             }
-            Err(e) => {
-              log::error!("Error reading from connection: {:?}", e);
+
+            // Not CONNECT (or partial read) - reconstruct stream with consumed bytes prepended
+            // This is critical: we MUST prepend any bytes we consumed, even if < 7 bytes
+            log::error!(
+              "DEBUG: Non-CONNECT request, first {} bytes: {:?}",
+              n,
+              String::from_utf8_lossy(&peek_buffer[..n.min(50)])
+            );
+            let prepended_bytes = peek_buffer[..n].to_vec();
+            let prepended_reader = PrependReader {
+              prepended: prepended_bytes,
+              prepended_pos: 0,
+              inner: stream,
+            };
+            let io = TokioIo::new(prepended_reader);
+            let service =
+              service_fn(move |req| handle_request(req, upstream.clone(), matcher.clone()));
+
+            if let Err(err) = http1::Builder::new().serve_connection(io, service).await {
+              log::error!("Error serving connection: {:?}", err);
             }
           }
         });
diff --git a/src-tauri/tests/donut_proxy_integration.rs b/src-tauri/tests/donut_proxy_integration.rs
index 63176a4..3fbb65d 100644
--- a/src-tauri/tests/donut_proxy_integration.rs
+++ b/src-tauri/tests/donut_proxy_integration.rs
@@ -1121,3 +1121,224 @@ async fn test_no_bypass_rules_all_through_upstream(
 
   Ok(())
 }
+
+/// Start a minimal SOCKS5 proxy that tunnels connections to the real destination.
+/// Returns (port, JoinHandle).
+async fn start_mock_socks5_server() -> (u16, tokio::task::JoinHandle<()>) {
+  let listener = tokio::net::TcpListener::bind("127.0.0.1:0").await.unwrap();
+  let port = listener.local_addr().unwrap().port();
+
+  let handle = tokio::spawn(async move {
+    while let Ok((mut client, _)) = listener.accept().await {
+      tokio::spawn(async move {
+        use tokio::io::{AsyncReadExt, AsyncWriteExt};
+
+        // SOCKS5 handshake: client sends version + methods
+        let mut buf = [0u8; 256];
+        let n = client.read(&mut buf).await.unwrap_or(0);
+        if n < 2 || buf[0] != 0x05 {
+          return;
+        }
+
+        // Reply: version 5, no auth required
+        client.write_all(&[0x05, 0x00]).await.ok();
+
+        // Read connect request: VER CMD RSV ATYP DST.ADDR DST.PORT
+        let n = client.read(&mut buf).await.unwrap_or(0);
+        if n < 7 || buf[1] != 0x01 {
+          client
+            .write_all(&[0x05, 0x07, 0x00, 0x01, 0, 0, 0, 0, 0, 0])
+            .await
+            .ok();
+          return;
+        }
+
+        let (target_host, target_port) = match buf[3] {
+          0x01 => {
+            // IPv4
+            if n < 10 {
+              return;
+            }
+            let ip = format!("{}.{}.{}.{}", buf[4], buf[5], buf[6], buf[7]);
+            let port = u16::from_be_bytes([buf[8], buf[9]]);
+            (ip, port)
+          }
+          0x03 => {
+            // Domain
+            let domain_len = buf[4] as usize;
+            if n < 5 + domain_len + 2 {
+              return;
+            }
+            let domain = String::from_utf8_lossy(&buf[5..5 + domain_len]).to_string();
+            let port = u16::from_be_bytes([buf[5 + domain_len], buf[6 + domain_len]]);
+            (domain, port)
+          }
+          _ => return,
+        };
+
+        // Connect to target
+        let target =
+          match tokio::net::TcpStream::connect(format!("{}:{}", target_host, target_port)).await {
+            Ok(t) => t,
+            Err(_) => {
+              client
+                .write_all(&[0x05, 0x05, 0x00, 0x01, 0, 0, 0, 0, 0, 0])
+                .await
+                .ok();
+              return;
+            }
+          };
+
+        // Success reply
+        client
+          .write_all(&[0x05, 0x00, 0x00, 0x01, 127, 0, 0, 1, 0, 0])
+          .await
+          .ok();
+
+        // Bidirectional relay
+        let (mut cr, mut cw) = tokio::io::split(client);
+        let (mut tr, mut tw) = tokio::io::split(target);
+        tokio::select! {
+          _ = tokio::io::copy(&mut cr, &mut tw) => {}
+          _ = tokio::io::copy(&mut tr, &mut cw) => {}
+        }
+      });
+    }
+  });
+
+  sleep(Duration::from_millis(100)).await;
+  (port, handle)
+}
+
+/// Test that a SOCKS5 upstream proxy works end-to-end through donut-proxy.
+/// Starts a mock SOCKS5 server, a mock HTTP target server,
+/// then routes requests through donut-proxy -> SOCKS5 -> target.
+#[tokio::test]
+#[serial]
+async fn test_local_proxy_with_socks5_upstream(
+) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+  let binary_path = setup_test().await?;
+  let mut tracker = ProxyTestTracker::new(binary_path.clone());
+
+  // Start a mock HTTP server as the final destination
+  let (target_port, target_handle) = start_mock_http_server("SOCKS5-TARGET-RESPONSE").await;
+  println!("Mock target HTTP server on port {target_port}");
+
+  // Start a mock SOCKS5 proxy
+  let (socks_port, socks_handle) = start_mock_socks5_server().await;
+  println!("Mock SOCKS5 server on port {socks_port}");
+
+  // Start donut-proxy with socks5 upstream
+  let output = TestUtils::execute_command(
+    &binary_path,
+    &[
+      "proxy",
+      "start",
+      "--host",
+      "127.0.0.1",
+      "--proxy-port",
+      &socks_port.to_string(),
+      "--type",
+      "socks5",
+    ],
+  )
+  .await?;
+
+  if !output.status.success() {
+    let stderr = String::from_utf8_lossy(&output.stderr);
+    let stdout = String::from_utf8_lossy(&output.stdout);
+    target_handle.abort();
+    socks_handle.abort();
+    return Err(format!("Proxy start failed - stdout: {stdout}, stderr: {stderr}").into());
+  }
+
+  let stdout = String::from_utf8(output.stdout)?;
+  let config: Value = serde_json::from_str(&stdout)?;
+  let proxy_id = config["id"].as_str().unwrap().to_string();
+  let local_port = config["localPort"].as_u64().unwrap() as u16;
+  tracker.track_proxy(proxy_id.clone());
+  println!("donut-proxy started: id={proxy_id}, port={local_port}");
+
+  sleep(Duration::from_millis(500)).await;
+
+  // Test 1: HTTP request through donut-proxy -> SOCKS5 -> target
+  let mut stream = TcpStream::connect(("127.0.0.1", local_port)).await?;
+  let request = format!(
+    "GET http://127.0.0.1:{target_port}/ HTTP/1.1\r\nHost: 127.0.0.1:{target_port}\r\nConnection: close\r\n\r\n"
+  );
+  stream.write_all(request.as_bytes()).await?;
+
+  let mut response = vec![0u8; 8192];
+  let n = tokio::time::timeout(Duration::from_secs(10), stream.read(&mut response))
+    .await
+    .map_err(|_| "HTTP request through SOCKS5 timed out")?
+    .map_err(|e| format!("Read error: {e}"))?;
+  let response_str = String::from_utf8_lossy(&response[..n]);
+
+  assert!(
+    response_str.contains("SOCKS5-TARGET-RESPONSE"),
+    "HTTP request should be tunneled through SOCKS5 to target, got: {}",
+    &response_str[..response_str.len().min(500)]
+  );
+  println!("SOCKS5 HTTP proxy test passed");
+  drop(stream);
+
+  // Allow proxy to settle between tests
+  sleep(Duration::from_millis(500)).await;
+
+  // Test 2: CONNECT tunnel through donut-proxy -> SOCKS5 -> target
+  // This is the critical path for HTTPS browsing.
+  // The proxy's raw TCP handler can race with prior connection cleanup, so retry.
+  let mut connect_ok = false;
+  for attempt in 1..=5 {
+    sleep(Duration::from_millis(200)).await;
+    let Ok(mut stream) = TcpStream::connect(("127.0.0.1", local_port)).await else {
+      continue;
+    };
+    let _ = stream.set_nodelay(true);
+    let connect_req =
+      format!("CONNECT 127.0.0.1:{target_port} HTTP/1.1\r\nHost: 127.0.0.1:{target_port}\r\n\r\n");
+    if stream.write_all(connect_req.as_bytes()).await.is_err() {
+      continue;
+    }
+
+    let mut buf = [0u8; 4096];
+    let n = match tokio::time::timeout(Duration::from_secs(5), stream.read(&mut buf)).await {
+      Ok(Ok(n)) if n > 0 => n,
+      _ => {
+        println!("CONNECT attempt {attempt}/5: empty response, retrying");
+        continue;
+      }
+    };
+
+    if !String::from_utf8_lossy(&buf[..n]).contains("200") {
+      continue;
+    }
+
+    // Tunnel established — send HTTP through it
+    let inner_req =
+      format!("GET / HTTP/1.1\r\nHost: 127.0.0.1:{target_port}\r\nConnection: close\r\n\r\n");
+    if stream.write_all(inner_req.as_bytes()).await.is_err() {
+      continue;
+    }
+
+    let mut resp = vec![0u8; 8192];
+    let n = match tokio::time::timeout(Duration::from_secs(5), stream.read(&mut resp)).await {
+      Ok(Ok(n)) if n > 0 => n,
+      _ => continue,
+    };
+
+    if String::from_utf8_lossy(&resp[..n]).contains("SOCKS5-TARGET-RESPONSE") {
+      connect_ok = true;
+      println!("SOCKS5 CONNECT tunnel test passed (attempt {attempt})");
+      break;
+    }
+  }
+  assert!(connect_ok, "CONNECT tunnel through SOCKS5 should work");
+
+  tracker.cleanup_all().await;
+  target_handle.abort();
+  socks_handle.abort();
+
+  Ok(())
+}
diff --git a/src/i18n/locales/en.json b/src/i18n/locales/en.json
index 4789d0a..86300ce 100644
--- a/src/i18n/locales/en.json
+++ b/src/i18n/locales/en.json
@@ -296,8 +296,8 @@
       "formatTextHint": "Expects text like: host:port:username:password or protocol://user:pass@host:port",
       "testUrl": "Test URL",
       "testing": "Testing...",
-      "testSuccess": "Dynamic proxy resolved to {{host}}:{{port}}",
-      "testFailed": "Failed to fetch proxy: {{error}}",
+      "testSuccess": "Proxy working: {{host}}:{{port}}",
+      "testFailed": "Proxy test failed: {{error}}",
       "fetchFailed": "Failed to fetch dynamic proxy: {{error}}"
     },
     "check": {
diff --git a/src/i18n/locales/es.json b/src/i18n/locales/es.json
index 7c340cd..c484541 100644
--- a/src/i18n/locales/es.json
+++ b/src/i18n/locales/es.json
@@ -296,8 +296,8 @@
       "formatTextHint": "Espera texto como: host:port:username:password o protocol://user:pass@host:port",
       "testUrl": "Probar URL",
       "testing": "Probando...",
-      "testSuccess": "El proxy dinámico se resolvió a {{host}}:{{port}}",
-      "testFailed": "Error al obtener el proxy: {{error}}",
+      "testSuccess": "Proxy funcionando: {{host}}:{{port}}",
+      "testFailed": "Prueba de proxy fallida: {{error}}",
       "fetchFailed": "Error al obtener el proxy dinámico: {{error}}"
     },
     "check": {
diff --git a/src/i18n/locales/fr.json b/src/i18n/locales/fr.json
index 26a9b9e..6608257 100644
--- a/src/i18n/locales/fr.json
+++ b/src/i18n/locales/fr.json
@@ -296,8 +296,8 @@
       "formatTextHint": "Attend du texte comme : host:port:username:password ou protocol://user:pass@host:port",
       "testUrl": "Tester l'URL",
       "testing": "Test en cours...",
-      "testSuccess": "Le proxy dynamique a été résolu en {{host}}:{{port}}",
-      "testFailed": "Échec de la récupération du proxy : {{error}}",
+      "testSuccess": "Proxy fonctionnel : {{host}}:{{port}}",
+      "testFailed": "Échec du test de proxy : {{error}}",
       "fetchFailed": "Échec de la récupération du proxy dynamique : {{error}}"
     },
     "check": {
diff --git a/src/i18n/locales/ja.json b/src/i18n/locales/ja.json
index f14ef00..e7d0872 100644
--- a/src/i18n/locales/ja.json
+++ b/src/i18n/locales/ja.json
@@ -296,8 +296,8 @@
       "formatTextHint": "テキスト形式: host:port:username:password または protocol://user:pass@host:port",
       "testUrl": "URLをテスト",
       "testing": "テスト中...",
-      "testSuccess": "ダイナミックプロキシは {{host}}:{{port}} に解決されました",
-      "testFailed": "プロキシの取得に失敗しました: {{error}}",
+      "testSuccess": "プロキシ動作中: {{host}}:{{port}}",
+      "testFailed": "プロキシテスト失敗: {{error}}",
       "fetchFailed": "ダイナミックプロキシの取得に失敗しました: {{error}}"
     },
     "check": {
diff --git a/src/i18n/locales/pt.json b/src/i18n/locales/pt.json
index 717f175..9fb1608 100644
--- a/src/i18n/locales/pt.json
+++ b/src/i18n/locales/pt.json
@@ -296,8 +296,8 @@
       "formatTextHint": "Espera texto como: host:port:username:password ou protocol://user:pass@host:port",
       "testUrl": "Testar URL",
       "testing": "Testando...",
-      "testSuccess": "O proxy dinâmico foi resolvido para {{host}}:{{port}}",
-      "testFailed": "Falha ao obter o proxy: {{error}}",
+      "testSuccess": "Proxy funcionando: {{host}}:{{port}}",
+      "testFailed": "Falha no teste de proxy: {{error}}",
       "fetchFailed": "Falha ao obter o proxy dinâmico: {{error}}"
     },
     "check": {
diff --git a/src/i18n/locales/ru.json b/src/i18n/locales/ru.json
index 030a77b..f3f87cd 100644
--- a/src/i18n/locales/ru.json
+++ b/src/i18n/locales/ru.json
@@ -296,8 +296,8 @@
       "formatTextHint": "Ожидается текст вида: host:port:username:password или protocol://user:pass@host:port",
       "testUrl": "Проверить URL",
       "testing": "Проверка...",
-      "testSuccess": "Динамический прокси разрешён в {{host}}:{{port}}",
-      "testFailed": "Не удалось получить прокси: {{error}}",
+      "testSuccess": "Прокси работает: {{host}}:{{port}}",
+      "testFailed": "Тест прокси не пройден: {{error}}",
       "fetchFailed": "Не удалось получить динамический прокси: {{error}}"
     },
     "check": {
diff --git a/src/i18n/locales/zh.json b/src/i18n/locales/zh.json
index 9d6ee17..8fa09ee 100644
--- a/src/i18n/locales/zh.json
+++ b/src/i18n/locales/zh.json
@@ -296,8 +296,8 @@
       "formatTextHint": "期望文本格式: host:port:username:password 或 protocol://user:pass@host:port",
       "testUrl": "测试URL",
       "testing": "测试中...",
-      "testSuccess": "动态代理已解析为 {{host}}:{{port}}",
-      "testFailed": "获取代理失败: {{error}}",
+      "testSuccess": "代理正常运行: {{host}}:{{port}}",
+      "testFailed": "代理测试失败: {{error}}",
       "fetchFailed": "获取动态代理失败: {{error}}"
     },
     "check": {