diff --git a/api/@ohos.UiTest.d.ts b/api/@ohos.UiTest.d.ts
index 5d8b1069b0130a9ee1028b6cd14722b481ddd1cb..6c9d35fd9cd8ab09edfaec1a3d85323bed4e6160 100755
--- a/api/@ohos.UiTest.d.ts
+++ b/api/@ohos.UiTest.d.ts
@@ -1540,9 +1540,8 @@ declare interface UIEventObserver {
    * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified; 2. Incorrect parameter types; 3. Parameter verification failed.
    * @syscap SystemCapability.Test.UiTest
    * @atomicservice
-   * @since arkts {'1.1':'11','1.2':'20'}
+   * @since 11
    * @test
-   * @arkts 1.1&1.2
    */
   once(type: 'toastShow', callback: Callback<UIElementInfo>): void;
 
@@ -1564,11 +1563,40 @@ declare interface UIEventObserver {
    * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified; 2. Incorrect parameter types; 3. Parameter verification failed.
    * @syscap SystemCapability.Test.UiTest
    * @atomicservice
-   * @since arkts {'1.1':'11','1.2':'20'}
+   * @since 11
    * @test
-   * @arkts 1.1&1.2
    */
   once(type: 'dialogShow', callback: Callback<UIElementInfo>): void;
+
+  /**
+   * @arkts 1.2
+   */
+  overload once { onceToastShow, onceDialogShow };
+  /**
+   * Listen for toast show once
+   * 
+   * @param { 'toastShow' } type -'toastShow'.
+   * @param { Callback<UIElementInfo> } callback - function, returns the monitored UIElementInfo.
+   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified; 2. Incorrect parameter types; 3. Parameter verification failed.
+   * @syscap SystemCapability.Test.UiTest
+   * @since 20
+   * @test
+   * @arkts 1.2
+   */
+  onceToastShow(type: 'toastShow', callback: Callback<UIElementInfo>): void;
+  
+  /**
+   * Listen for dialog show once
+   * 
+   * @param { 'dialogShow' } type - 'dialogShow'.
+   * @param { Callback<UIElementInfo> } callback - function, returns the monitored UIElementInfo.
+   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified; 2. Incorrect parameter types; 3. Parameter verification failed.
+   * @syscap SystemCapability.Test.UiTest
+   * @since 20
+   * @test
+   * @arkts 1.2
+   */
+  onceDialogShow(type: 'dialogShow', callback: Callback<UIElementInfo>): void;
 }
 
 /**