diff --git a/src/checkbox/Checker.tsx b/src/checkbox/Checker.tsx
index 59c77b5e3..b8551fb03 100644
--- a/src/checkbox/Checker.tsx
+++ b/src/checkbox/Checker.tsx
@@ -5,6 +5,15 @@ import Icon from '../icon';
 export type CheckerShape = 'square' | 'round';
 export type CheckerLabelPosition = 'left' | 'right';
 
+type CheckerParent = {
+  props: {
+    disabled?: boolean;
+    iconSize?: number | string;
+    direction?: 'horizontal' | 'vertical';
+    checkedColor?: string;
+  };
+};
+
 export const checkerProps = {
   name: null as any,
   disabled: Boolean,
@@ -23,7 +32,7 @@ export default defineComponent({
   props: {
     ...checkerProps,
     role: String,
-    parent: Object as PropType<Record<string, any> | null>,
+    parent: Object as PropType<CheckerParent | null>,
     checked: Boolean,
     bindGroup: {
       type: Boolean,
@@ -40,13 +49,13 @@ export default defineComponent({
   setup(props, { emit, slots }) {
     const iconRef = ref<HTMLElement>();
 
-    const getParentProp = (name: string) => {
+    const getParentProp = <T extends keyof CheckerParent['props']>(name: T) => {
       if (props.parent && props.bindGroup) {
         return props.parent.props[name];
       }
     };
 
-    const disabled = computed<boolean>(
+    const disabled = computed(
       () => getParentProp('disabled') || props.disabled
     );
 
diff --git a/src/collapse/test/index.spec.js b/src/collapse/test/index.spec.js
index cf1c55ef2..9a45ad852 100644
--- a/src/collapse/test/index.spec.js
+++ b/src/collapse/test/index.spec.js
@@ -176,7 +176,7 @@ test('should toggle collapse after calling the toggle method in accordion mode',
     setup() {
       const itemA = ref();
       const itemB = ref();
-      const active = ref([]);
+      const active = ref('');
       return {
         itemA,
         itemB,
@@ -194,6 +194,7 @@ test('should toggle collapse after calling the toggle method in accordion mode',
   });
 
   wrapper.vm.itemA.toggle();
+  await later();
   expect(wrapper.vm.active).toEqual('a');
 
   wrapper.vm.itemB.toggle();
diff --git a/src/coupon/index.tsx b/src/coupon/index.tsx
index 796253d84..e69a50bb5 100644
--- a/src/coupon/index.tsx
+++ b/src/coupon/index.tsx
@@ -100,7 +100,6 @@ export default createComponent({
               <p class={bem('valid')}>{validPeriod.value}</p>
               {!disabled && (
                 <Checkbox
-                  size={18}
                   class={bem('corner')}
                   modelValue={chosen}
                   checkedColor={RED}