diff --git a/src/Slider.tsx b/src/Slider.tsx
index 965acc176..44b169f82 100644
--- a/src/Slider.tsx
+++ b/src/Slider.tsx
@@ -444,7 +444,7 @@ const Slider = React.forwardRef<SliderRef, SliderProps<number | number[]>>((prop
     },
     blur: () => {
       const { activeElement } = document;
-      if (containerRef.current.contains(activeElement)) {
+      if (containerRef.current?.contains(activeElement)) {
         (activeElement as HTMLElement)?.blur();
       }
     },
@@ -513,10 +513,7 @@ const Slider = React.forwardRef<SliderRef, SliderProps<number | number[]>>((prop
       >
         <div
           className={cls(`${prefixCls}-rail`, classNames?.rail)}
-          style={{
-            ...railStyle,
-            ...styles?.rail,
-          }}
+          style={{ ...railStyle, ...styles?.rail }}
         />
 
         <Tracks
@@ -524,7 +521,7 @@ const Slider = React.forwardRef<SliderRef, SliderProps<number | number[]>>((prop
           style={trackStyle}
           values={sortedCacheValues}
           startPoint={startPoint}
-          onStartMove={mergedDraggableTrack ? onStartMove : null}
+          onStartMove={mergedDraggableTrack ? onStartMove : undefined}
         />
 
         <Steps
diff --git a/tests/Slider.test.js b/tests/Slider.test.js
index accb956f5..b80f3fd8c 100644
--- a/tests/Slider.test.js
+++ b/tests/Slider.test.js
@@ -1,9 +1,9 @@
-import React from 'react';
-import classNames from 'classnames';
-import { render, fireEvent, createEvent } from '@testing-library/react';
 import '@testing-library/jest-dom';
+import { createEvent, fireEvent, render } from '@testing-library/react';
+import classNames from 'classnames';
 import keyCode from 'rc-util/lib/KeyCode';
 import { spyElementPrototypes } from 'rc-util/lib/test/domHook';
+import React from 'react';
 import Slider from '../src/Slider';
 
 describe('Slider', () => {
@@ -189,7 +189,9 @@ describe('Slider', () => {
   it('decreases the value when key "left" is pressed', () => {
     const onChange = jest.fn();
     const onChangeComplete = jest.fn();
-    const { container } = render(<Slider defaultValue={50} onChange={onChange} onChangeComplete={onChangeComplete} />);
+    const { container } = render(
+      <Slider defaultValue={50} onChange={onChange} onChangeComplete={onChangeComplete} />,
+    );
 
     fireEvent.keyDown(container.getElementsByClassName('rc-slider-handle')[0], {
       keyCode: keyCode.LEFT,
@@ -647,4 +649,9 @@ describe('Slider', () => {
     fireEvent(document, mouseMove);
     expect(onChange).toHaveBeenLastCalledWith(100);
   });
+
+  it('should render Slider with included=false', () => {
+    const { asFragment } = render(<Slider included={false} />);
+    expect(asFragment().firstChild).toMatchSnapshot();
+  });
 });
diff --git a/tests/__snapshots__/Slider.test.js.snap b/tests/__snapshots__/Slider.test.js.snap
index e7163d46d..40af08187 100644
--- a/tests/__snapshots__/Slider.test.js.snap
+++ b/tests/__snapshots__/Slider.test.js.snap
@@ -28,6 +28,30 @@ exports[`Slider should render Slider with correct DOM structure 1`] = `
 </div>
 `;
 
+exports[`Slider should render Slider with included=false 1`] = `
+<div
+  class="rc-slider rc-slider-horizontal"
+>
+  <div
+    class="rc-slider-rail"
+  />
+  <div
+    class="rc-slider-step"
+  />
+  <div
+    aria-disabled="false"
+    aria-orientation="horizontal"
+    aria-valuemax="100"
+    aria-valuemin="0"
+    aria-valuenow="0"
+    class="rc-slider-handle"
+    role="slider"
+    style="left: 0%; transform: translateX(-50%);"
+    tabindex="0"
+  />
+</div>
+`;
+
 exports[`Slider should render Slider without handle if value is null 1`] = `
 <div
   class="rc-slider rc-slider-horizontal"
diff --git a/tests/common.test.js b/tests/common.test.js
index e38398399..23d417af4 100644
--- a/tests/common.test.js
+++ b/tests/common.test.js
@@ -1,10 +1,10 @@
 /* eslint-disable max-len, no-undef */
-import React from 'react';
-import { render, fireEvent, createEvent } from '@testing-library/react';
 import '@testing-library/jest-dom';
-import { spyElementPrototypes } from 'rc-util/lib/test/domHook';
+import { createEvent, fireEvent, render } from '@testing-library/react';
 import KeyCode from 'rc-util/lib/KeyCode';
-import Slider, { Range, createSliderWithTooltip } from '../src';
+import { spyElementPrototypes } from 'rc-util/lib/test/domHook';
+import React from 'react';
+import Slider from '../src';
 
 // const setWidth = (object, width) => {
 //   // https://github.com/tmpvar/jsdom/commit/0cdb2efcc69b6672dc2928644fc0172df5521176
@@ -366,7 +366,7 @@ describe('Common', () => {
       'Warning: [rc-slider] `onAfterChange` is deprecated. Please use `onChangeComplete` instead.',
     );
     errSpy.mockRestore();
-  })
+  });
 
   // Move to antd instead
   // it('the tooltip should be attach to the container with the id tooltip', () => {
diff --git a/tests/marks.test.js b/tests/marks.test.js
index 0d8c53c57..deefbdb32 100644
--- a/tests/marks.test.js
+++ b/tests/marks.test.js
@@ -1,8 +1,8 @@
 /* eslint-disable max-len, no-undef */
-import React from 'react';
-import { spyElementPrototypes } from 'rc-util/lib/test/domHook';
-import { render, fireEvent } from '@testing-library/react';
 import '@testing-library/jest-dom';
+import { fireEvent, render } from '@testing-library/react';
+import { spyElementPrototypes } from 'rc-util/lib/test/domHook';
+import React from 'react';
 import Slider from '../src';
 
 describe('marks', () => {