diff --git a/uitest/core/widget_operator.cpp b/uitest/core/widget_operator.cpp
index eec0f14..8190a93 100644
--- a/uitest/core/widget_operator.cpp
+++ b/uitest/core/widget_operator.cpp
@@ -41,9 +41,9 @@ namespace OHOS::uitest {
 
         void Visit(const Widget &widget) override
         {
-            string type = widget.GetAttr(ATTR_NAMES[UiAttr::TYPE], "") + "/";
-            string value =  widget.GetAttr(ATTR_NAMES[UiAttr::TEXT], "") + "/";
-            string hashcode =  widget.GetAttr(ATTR_NAMES[UiAttr::HASHCODE], "") + ";";
+            auto type = widget.GetAttr(ATTR_NAMES[UiAttr::TYPE], "") + "/";
+            auto value =  widget.GetAttr(ATTR_NAMES[UiAttr::TEXT], "") + "/";
+            auto hashcode =  widget.GetAttr(ATTR_NAMES[UiAttr::HASHCODE], "") + ";";
             receiver_ = receiver_ + type + value + hashcode;
             if (value != "/") {
                 leafNodes_.push_back(type + value + hashcode);
@@ -80,7 +80,7 @@ namespace OHOS::uitest {
 
     void WidgetOperator::ScrollToEnd(bool toTop, ApiCallErr &error) const
     {
-        string prevSnapshot = "", preKeySnapshot = "";
+        string prevSnapshot = "", targetSnapshot = "";
         while (true) {
             auto scrollWidget = driver_.RetrieveWidget(widget_, error);
             if (scrollWidget == nullptr || error.code_ != NO_ERROR) {
@@ -89,11 +89,11 @@ namespace OHOS::uitest {
             string snapshot;
             vector<string> leafNodes;
             TakeScopeUiSnapshot(driver_, *scrollWidget, snapshot, leafNodes);
-            if ((prevSnapshot == snapshot) || (snapshot.find(preKeySnapshot) != string::npos && preKeySnapshot != "")) {
+            if ((prevSnapshot == snapshot) || (snapshot.find(targetSnapshot) != string::npos && targetSnapshot != "")) {
                 return;
             }
             prevSnapshot = snapshot;
-            preKeySnapshot = (toTop ? leafNodes.front() : leafNodes.back());
+            targetSnapshot = (toTop ? leafNodes.front() : leafNodes.back());
             auto bounds = scrollWidget->GetBounds();
             if (options_.scrollWidgetDeadZone_ > 0) {
                 // scroll widget from its deadZone maybe unresponsive
@@ -217,7 +217,7 @@ namespace OHOS::uitest {
     {
         PointerMatrix scrollEvents;
         bool scrollingUp = true;
-        string prevSnapshot = "", preKeySnapshot = "";
+        string prevSnapshot = "", targetSnapshot = "";
         vector<reference_wrapper<const Widget>> receiver;
         while (true) {
             auto scrollWidget = driver_.RetrieveWidget(widget_, error);
@@ -235,7 +235,7 @@ namespace OHOS::uitest {
             string snapshot;
             vector<string> leafNodes;
             TakeScopeUiSnapshot(driver_, *scrollWidget, snapshot, leafNodes);
-            if ((snapshot == prevSnapshot) || (snapshot.find(preKeySnapshot) != string::npos && preKeySnapshot != "")) {
+            if ((snapshot == prevSnapshot) || (snapshot.find(targetSnapshot) != string::npos && targetSnapshot != "")) {
                 // scrolling down to bottom, search completed with failure
                 if (!scrollingUp) {
                     auto msg = string("Scroll search widget failed: ") + selector.Describe();
@@ -247,7 +247,7 @@ namespace OHOS::uitest {
                 }
             }
             prevSnapshot = snapshot;
-            preKeySnapshot = (scrollingUp ? leafNodes.front() : leafNodes.back());
+            targetSnapshot = (scrollingUp ? leafNodes.front() : leafNodes.back());
             // execute scrolling on the scroll_widget without update UI
             auto bounds = scrollWidget->GetBounds();
             if (options_.scrollWidgetDeadZone_ > 0) {