diff --git a/components/radio/Group.tsx b/components/radio/Group.tsx
index 59c901dce6..7b29700d82 100644
--- a/components/radio/Group.tsx
+++ b/components/radio/Group.tsx
@@ -23,7 +23,7 @@ export type RadioGroupChildOption = {
 export const radioGroupProps = () => ({
   prefixCls: String,
   value: PropTypes.any,
-  size: PropTypes.oneOf(RadioGroupSizeTypes).def('default'),
+  size: PropTypes.oneOf(RadioGroupSizeTypes),
   options: {
     type: Array as PropType<Array<string | RadioGroupChildOption | number>>,
   },
diff --git a/components/radio/__tests__/__snapshots__/group.test.js.snap b/components/radio/__tests__/__snapshots__/group.test.js.snap
index 1cfc6747b5..28a8170c52 100644
--- a/components/radio/__tests__/__snapshots__/group.test.js.snap
+++ b/components/radio/__tests__/__snapshots__/group.test.js.snap
@@ -1,9 +1,9 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`Radio all children should have a name property 1`] = `<div class="ant-radio-group ant-radio-group-outline ant-radio-group-default"><label class="ant-radio-wrapper"><span class="ant-radio"><input name="radiogroup" type="radio" class="ant-radio-input" value="A"><span class="ant-radio-inner"></span></span><span>A</span></label><label class="ant-radio-wrapper"><span class="ant-radio"><input name="radiogroup" type="radio" class="ant-radio-input" value="B"><span class="ant-radio-inner"></span></span><span>B</span></label><label class="ant-radio-wrapper"><span class="ant-radio"><input name="radiogroup" type="radio" class="ant-radio-input" value="C"><span class="ant-radio-inner"></span></span><span>C</span></label></div>`;
+exports[`Radio all children should have a name property 1`] = `<div class="ant-radio-group ant-radio-group-outline"><label class="ant-radio-wrapper"><span class="ant-radio"><input name="radiogroup" type="radio" class="ant-radio-input" value="A"><span class="ant-radio-inner"></span></span><span>A</span></label><label class="ant-radio-wrapper"><span class="ant-radio"><input name="radiogroup" type="radio" class="ant-radio-input" value="B"><span class="ant-radio-inner"></span></span><span>B</span></label><label class="ant-radio-wrapper"><span class="ant-radio"><input name="radiogroup" type="radio" class="ant-radio-input" value="C"><span class="ant-radio-inner"></span></span><span>C</span></label></div>`;
 
-exports[`Radio fire change events when value changes 1`] = `<div class="ant-radio-group ant-radio-group-outline ant-radio-group-default"><label class="ant-radio-wrapper"><span class="ant-radio"><input type="radio" class="ant-radio-input" value="A"><span class="ant-radio-inner"></span></span><span>A</span></label><label class="ant-radio-wrapper"><span class="ant-radio"><input type="radio" class="ant-radio-input" value="B"><span class="ant-radio-inner"></span></span><span>B</span></label><label class="ant-radio-wrapper"><span class="ant-radio"><input type="radio" class="ant-radio-input" value="C"><span class="ant-radio-inner"></span></span><span>C</span></label></div>`;
+exports[`Radio fire change events when value changes 1`] = `<div class="ant-radio-group ant-radio-group-outline"><label class="ant-radio-wrapper"><span class="ant-radio"><input type="radio" class="ant-radio-input" value="A"><span class="ant-radio-inner"></span></span><span>A</span></label><label class="ant-radio-wrapper"><span class="ant-radio"><input type="radio" class="ant-radio-input" value="B"><span class="ant-radio-inner"></span></span><span>B</span></label><label class="ant-radio-wrapper"><span class="ant-radio"><input type="radio" class="ant-radio-input" value="C"><span class="ant-radio-inner"></span></span><span>C</span></label></div>`;
 
-exports[`Radio fire change events when value changes 2`] = `<div class="ant-radio-group ant-radio-group-outline ant-radio-group-default"><label class="ant-radio-wrapper ant-radio-wrapper-checked"><span class="ant-radio ant-radio-checked"><input type="radio" class="ant-radio-input" value="A"><span class="ant-radio-inner"></span></span><span>A</span></label><label class="ant-radio-wrapper"><span class="ant-radio"><input type="radio" class="ant-radio-input" value="B"><span class="ant-radio-inner"></span></span><span>B</span></label><label class="ant-radio-wrapper"><span class="ant-radio"><input type="radio" class="ant-radio-input" value="C"><span class="ant-radio-inner"></span></span><span>C</span></label></div>`;
+exports[`Radio fire change events when value changes 2`] = `<div class="ant-radio-group ant-radio-group-outline"><label class="ant-radio-wrapper ant-radio-wrapper-checked"><span class="ant-radio ant-radio-checked"><input type="radio" class="ant-radio-input" value="A"><span class="ant-radio-inner"></span></span><span>A</span></label><label class="ant-radio-wrapper"><span class="ant-radio"><input type="radio" class="ant-radio-input" value="B"><span class="ant-radio-inner"></span></span><span>B</span></label><label class="ant-radio-wrapper"><span class="ant-radio"><input type="radio" class="ant-radio-input" value="C"><span class="ant-radio-inner"></span></span><span>C</span></label></div>`;
 
-exports[`Radio passes prefixCls down to radio 1`] = `<div class="my-radio-group my-radio-group-outline my-radio-group-default"><label class="my-radio-wrapper"><span class="my-radio"><input type="radio" class="my-radio-input" value="Apple"><span class="my-radio-inner"></span></span><span>Apple</span></label><label class="my-radio-wrapper"><span class="my-radio"><input type="radio" class="my-radio-input" value="Orange"><span class="my-radio-inner"></span></span><span>Orange</span></label></div>`;
+exports[`Radio passes prefixCls down to radio 1`] = `<div class="my-radio-group my-radio-group-outline"><label class="my-radio-wrapper"><span class="my-radio"><input type="radio" class="my-radio-input" value="Apple"><span class="my-radio-inner"></span></span><span>Apple</span></label><label class="my-radio-wrapper"><span class="my-radio"><input type="radio" class="my-radio-input" value="Orange"><span class="my-radio-inner"></span></span><span>Orange</span></label></div>`;