diff --git a/test/component.test.ts b/test/component.test.ts
index 2782d0d..70da79c 100644
--- a/test/component.test.ts
+++ b/test/component.test.ts
@@ -120,6 +120,17 @@ Component({
   },
 })
 
+expectError(
+  Component({
+    custom: 1,
+    methods: {
+      f() {
+        this.custom
+      },
+    },
+  }),
+)
+
 interface Config {
   a: number
 }
diff --git a/test/issue.test.ts b/test/issue.test.ts
index 08d6bf8..7dfda3f 100644
--- a/test/issue.test.ts
+++ b/test/issue.test.ts
@@ -470,7 +470,6 @@ import WX = WechatMiniprogram
   }
 
   Component({
-    _timer: '',
     properties: {
       bar: {
         type: Object,
@@ -490,7 +489,6 @@ import WX = WechatMiniprogram
         expectType<Foo>(this.data.bar)
         expectType<Foo>(this.properties.bar)
         expectType<Foo[]>(this.getData())
-        expectType<string>(this._timer)
       },
     }
   })
diff --git a/types/wx/lib.wx.component.d.ts b/types/wx/lib.wx.component.d.ts
index 10f7fb1..28638d4 100644
--- a/types/wx/lib.wx.component.d.ts
+++ b/types/wx/lib.wx.component.d.ts
@@ -64,8 +64,6 @@ declare namespace WechatMiniprogram.Component {
         Partial<Behavior<TBehavior>> &
         Partial<OtherOption> &
         Partial<Lifetimes> &
-        // 有很大几率会在 this.xxx 上使用一些暂存的变量，应该像Page一样支持传入自定义属性
-        Partial<TCustomInstanceProperty> &
         ThisType<
             Instance<
                 TData,