diff --git a/packages/backend/src/locales/ja-JP.json b/packages/backend/src/locales/ja-JP.json
index 87ea913..06082a8 100644
--- a/packages/backend/src/locales/ja-JP.json
+++ b/packages/backend/src/locales/ja-JP.json
@@ -23,7 +23,6 @@
       "CONNECTION_CREATED": "接続を作成しました",
       "CONNECTION_UPDATED": "接続を更新しました",
       "CONNECTION_DELETED": "接続を削除しました",
-      "CONNECTION_TESTED": "接続をテストしました",
       "PROXY_CREATED": "プロキシを作成しました",
       "PROXY_UPDATED": "プロキシを更新しました",
       "PROXY_DELETED": "プロキシを削除しました",
diff --git a/packages/backend/src/locales/zh-CN.json b/packages/backend/src/locales/zh-CN.json
index 208018f..a3eca21 100644
--- a/packages/backend/src/locales/zh-CN.json
+++ b/packages/backend/src/locales/zh-CN.json
@@ -9,7 +9,6 @@
     "CONNECTION_CREATED": "连接已创建",
     "CONNECTION_UPDATED": "连接已更新",
     "CONNECTION_DELETED": "连接已删除",
-    "CONNECTION_TESTED": "连接已测试",
     "PROXY_CREATED": "代理已创建",
     "PROXY_UPDATED": "代理已更新",
     "PROXY_DELETED": "代理已删除",
diff --git a/packages/backend/src/services/event.service.ts b/packages/backend/src/services/event.service.ts
index 454468d..4053842 100644
--- a/packages/backend/src/services/event.service.ts
+++ b/packages/backend/src/services/event.service.ts
@@ -13,7 +13,6 @@ export enum AppEventType {
   ConnectionCreated = 'CONNECTION_CREATED',
   ConnectionUpdated = 'CONNECTION_UPDATED',
   ConnectionDeleted = 'CONNECTION_DELETED',
-  ConnectionTested = 'CONNECTION_TESTED',
   ProxyCreated = 'PROXY_CREATED',
   ProxyUpdated = 'PROXY_UPDATED',
   ProxyDeleted = 'PROXY_DELETED',
diff --git a/packages/backend/src/types/audit.types.ts b/packages/backend/src/types/audit.types.ts
index fcec5d4..ac925a1 100644
--- a/packages/backend/src/types/audit.types.ts
+++ b/packages/backend/src/types/audit.types.ts
@@ -13,7 +13,6 @@ export type AuditLogActionType =
   | 'CONNECTION_CREATED'
   | 'CONNECTION_UPDATED'
   | 'CONNECTION_DELETED'
-  | 'CONNECTION_TESTED'
 
   // Proxies
   | 'PROXY_CREATED'
diff --git a/packages/backend/src/types/notification.types.ts b/packages/backend/src/types/notification.types.ts
index 72183ae..e6f5eb3 100644
--- a/packages/backend/src/types/notification.types.ts
+++ b/packages/backend/src/types/notification.types.ts
@@ -4,7 +4,7 @@ export type NotificationChannelType = 'webhook' | 'email' | 'telegram';
 export type NotificationEvent =
   | 'LOGIN_SUCCESS' | 'LOGIN_FAILURE' | 'LOGOUT' | 'PASSWORD_CHANGED'
   | '2FA_ENABLED' | '2FA_DISABLED' // Removed Passkey events
-  | 'CONNECTION_CREATED' | 'CONNECTION_UPDATED' | 'CONNECTION_DELETED' | 'CONNECTION_TESTED'
+  | 'CONNECTION_CREATED' | 'CONNECTION_UPDATED' | 'CONNECTION_DELETED'
   | 'PROXY_CREATED' | 'PROXY_UPDATED' | 'PROXY_DELETED'
   | 'TAG_CREATED' | 'TAG_UPDATED' | 'TAG_DELETED'
   | 'SETTINGS_UPDATED' | 'IP_WHITELIST_UPDATED' | 'IP_BLOCKED' 
diff --git a/packages/frontend/src/components/NotificationSettingForm.vue b/packages/frontend/src/components/NotificationSettingForm.vue
index 08d3618..9d8840e 100644
--- a/packages/frontend/src/components/NotificationSettingForm.vue
+++ b/packages/frontend/src/components/NotificationSettingForm.vue
@@ -270,7 +270,7 @@ const canTestUnsaved = computed(() => {
 const allNotificationEvents: NotificationEvent[] = [
     'LOGIN_SUCCESS', 'LOGIN_FAILURE', 'LOGOUT', 'PASSWORD_CHANGED', // Added LOGOUT, PASSWORD_CHANGED
     '2FA_ENABLED', '2FA_DISABLED', // Added 2FA,
-    'CONNECTION_CREATED', 'CONNECTION_UPDATED', 'CONNECTION_DELETED', 'CONNECTION_TESTED', // Changed _ADDED, added _TESTED
+    'CONNECTION_CREATED', 'CONNECTION_UPDATED', 'CONNECTION_DELETED',
     'PROXY_CREATED', 'PROXY_UPDATED', 'PROXY_DELETED', // Changed _ADDED
     'TAG_CREATED', 'TAG_UPDATED', 'TAG_DELETED', // Changed _ADDED
     'SETTINGS_UPDATED', 'IP_WHITELIST_UPDATED', // Added IP_WHITELIST_UPDATED
diff --git a/packages/frontend/src/locales/ja-JP.json b/packages/frontend/src/locales/ja-JP.json
index 74f9170..c72f201 100644
--- a/packages/frontend/src/locales/ja-JP.json
+++ b/packages/frontend/src/locales/ja-JP.json
@@ -501,7 +501,6 @@
           "CONNECTION_CREATED": "接続作成",
           "CONNECTION_UPDATED": "接続更新",
           "CONNECTION_DELETED": "接続削除",
-          "CONNECTION_TESTED": "接続テスト",
           "PROXY_CREATED": "プロキシ作成",
           "PROXY_UPDATED": "プロキシ更新",
           "PROXY_DELETED": "プロキシ削除",
@@ -722,7 +721,6 @@
         "CONNECTION_CREATED": "接続作成",
         "CONNECTION_UPDATED": "接続更新",
         "CONNECTION_DELETED": "接続削除",
-        "CONNECTION_TESTED": "接続テスト",
         "PROXY_CREATED": "プロキシ作成",
         "PROXY_UPDATED": "プロキシ更新",
         "PROXY_DELETED": "プロキシ削除",
diff --git a/packages/frontend/src/locales/zh-CN.json b/packages/frontend/src/locales/zh-CN.json
index 76b7ecc..5c2e52e 100644
--- a/packages/frontend/src/locales/zh-CN.json
+++ b/packages/frontend/src/locales/zh-CN.json
@@ -722,7 +722,6 @@
         "CONNECTION_CREATED": "连接已创建",
         "CONNECTION_UPDATED": "连接已更新",
         "CONNECTION_DELETED": "连接已删除",
-        "CONNECTION_TESTED": "连接已测试",
         "PROXY_CREATED": "代理已创建",
         "PROXY_UPDATED": "代理已更新",
         "PROXY_DELETED": "代理已删除",
diff --git a/packages/frontend/src/types/audit.types.ts b/packages/frontend/src/types/audit.types.ts
index 4692fe4..a958307 100644
--- a/packages/frontend/src/types/audit.types.ts
+++ b/packages/frontend/src/types/audit.types.ts
@@ -13,7 +13,6 @@ export type AuditLogActionType =
   | 'CONNECTION_CREATED'
   | 'CONNECTION_UPDATED'
   | 'CONNECTION_DELETED'
-  | 'CONNECTION_TESTED'
   // Proxies
   | 'PROXY_CREATED'
   | 'PROXY_UPDATED'
diff --git a/packages/frontend/src/types/server.types.ts b/packages/frontend/src/types/server.types.ts
index e3ad1ab..d664712 100644
--- a/packages/frontend/src/types/server.types.ts
+++ b/packages/frontend/src/types/server.types.ts
@@ -22,7 +22,7 @@ export type NotificationChannelType = 'webhook' | 'email' | 'telegram';
 export type NotificationEvent =
   | 'LOGIN_SUCCESS' | 'LOGIN_FAILURE' | 'LOGOUT' | 'PASSWORD_CHANGED'
   | '2FA_ENABLED' | '2FA_DISABLED'
-  | 'CONNECTION_CREATED' | 'CONNECTION_UPDATED' | 'CONNECTION_DELETED' | 'CONNECTION_TESTED'
+  | 'CONNECTION_CREATED' | 'CONNECTION_UPDATED' | 'CONNECTION_DELETED'
   | 'PROXY_CREATED' | 'PROXY_UPDATED' | 'PROXY_DELETED'
   | 'TAG_CREATED' | 'TAG_UPDATED' | 'TAG_DELETED'
   | 'SETTINGS_UPDATED' | 'IP_WHITELIST_UPDATED'
@@ -75,7 +75,7 @@ export type NotificationSettingData = Omit<NotificationSetting, 'id' | 'created_
 export type AuditLogActionType =
   | 'LOGIN_SUCCESS' | 'LOGIN_FAILURE' | 'LOGOUT' | 'PASSWORD_CHANGED'
   | '2FA_ENABLED' | '2FA_DISABLED'
-  | 'CONNECTION_CREATED' | 'CONNECTION_UPDATED' | 'CONNECTION_DELETED' | 'CONNECTION_TESTED'
+  | 'CONNECTION_CREATED' | 'CONNECTION_UPDATED' | 'CONNECTION_DELETED'
   | 'PROXY_CREATED' | 'PROXY_UPDATED' | 'PROXY_DELETED'
   | 'TAG_CREATED' | 'TAG_UPDATED' | 'TAG_DELETED'
   | 'SETTINGS_UPDATED' | 'IP_WHITELIST_UPDATED'
diff --git a/packages/frontend/src/views/AuditLogView.vue b/packages/frontend/src/views/AuditLogView.vue
index ec18d76..56f8ffa 100644
--- a/packages/frontend/src/views/AuditLogView.vue
+++ b/packages/frontend/src/views/AuditLogView.vue
@@ -119,7 +119,7 @@ const selectedActionType = ref<AuditLogActionType | ''>(''); // Allow empty stri
 const allActionTypes: AuditLogActionType[] = [
     'LOGIN_SUCCESS', 'LOGIN_FAILURE', 'LOGOUT', 'PASSWORD_CHANGED',
     '2FA_ENABLED', '2FA_DISABLED',
-    'CONNECTION_CREATED', 'CONNECTION_UPDATED', 'CONNECTION_DELETED', 'CONNECTION_TESTED',
+    'CONNECTION_CREATED', 'CONNECTION_UPDATED', 'CONNECTION_DELETED',
     'PROXY_CREATED', 'PROXY_UPDATED', 'PROXY_DELETED',
     'TAG_CREATED', 'TAG_UPDATED', 'TAG_DELETED',
     'SETTINGS_UPDATED', 'IP_WHITELIST_UPDATED',