diff --git a/packages/reactivity/src/baseHandlers.ts b/packages/reactivity/src/baseHandlers.ts
index a1b3003a5e7..7cee7aa9bd5 100644
--- a/packages/reactivity/src/baseHandlers.ts
+++ b/packages/reactivity/src/baseHandlers.ts
@@ -89,26 +89,26 @@ function hasOwnProperty(this: object, key: string) {
 class BaseReactiveHandler implements ProxyHandler<Target> {
   constructor(
     protected readonly _isReadonly = false,
-    protected readonly _shallow = false,
+    protected readonly _isShallow = false,
   ) {}
 
   get(target: Target, key: string | symbol, receiver: object) {
     const isReadonly = this._isReadonly,
-      shallow = this._shallow
+      isShallow = this._isShallow
     if (key === ReactiveFlags.IS_REACTIVE) {
       return !isReadonly
     } else if (key === ReactiveFlags.IS_READONLY) {
       return isReadonly
     } else if (key === ReactiveFlags.IS_SHALLOW) {
-      return shallow
+      return isShallow
     } else if (key === ReactiveFlags.RAW) {
       if (
         receiver ===
           (isReadonly
-            ? shallow
+            ? isShallow
               ? shallowReadonlyMap
               : readonlyMap
-            : shallow
+            : isShallow
               ? shallowReactiveMap
               : reactiveMap
           ).get(target) ||
@@ -143,7 +143,7 @@ class BaseReactiveHandler implements ProxyHandler<Target> {
       track(target, TrackOpTypes.GET, key)
     }
 
-    if (shallow) {
+    if (isShallow) {
       return res
     }
 
@@ -164,8 +164,8 @@ class BaseReactiveHandler implements ProxyHandler<Target> {
 }
 
 class MutableReactiveHandler extends BaseReactiveHandler {
-  constructor(shallow = false) {
-    super(false, shallow)
+  constructor(isShallow = false) {
+    super(false, isShallow)
   }
 
   set(
@@ -175,7 +175,7 @@ class MutableReactiveHandler extends BaseReactiveHandler {
     receiver: object,
   ): boolean {
     let oldValue = (target as any)[key]
-    if (!this._shallow) {
+    if (!this._isShallow) {
       const isOldValueReadonly = isReadonly(oldValue)
       if (!isShallow(value) && !isReadonly(value)) {
         oldValue = toRaw(oldValue)
@@ -237,8 +237,8 @@ class MutableReactiveHandler extends BaseReactiveHandler {
 }
 
 class ReadonlyReactiveHandler extends BaseReactiveHandler {
-  constructor(shallow = false) {
-    super(true, shallow)
+  constructor(isShallow = false) {
+    super(true, isShallow)
   }
 
   set(target: object, key: string | symbol) {