diff --git a/packages/docusaurus-theme-classic/src/theme-classic.d.ts b/packages/docusaurus-theme-classic/src/theme-classic.d.ts
index a5653f8edc..e6b4359b7a 100644
--- a/packages/docusaurus-theme-classic/src/theme-classic.d.ts
+++ b/packages/docusaurus-theme-classic/src/theme-classic.d.ts
@@ -180,6 +180,42 @@ declare module '@theme/DocSidebar' {
   export default function DocSidebar(props: Props): JSX.Element;
 }
 
+declare module '@theme/DocSidebar/Mobile' {
+  import type {Props as DocSidebarProps} from '@theme/DocSidebar';
+
+  export interface Props extends DocSidebarProps {}
+
+  export default function DocSidebarMobile(props: Props): JSX.Element;
+}
+
+declare module '@theme/DocSidebar/Desktop' {
+  import type {Props as DocSidebarProps} from '@theme/DocSidebar';
+
+  export interface Props extends DocSidebarProps {}
+
+  export default function DocSidebarDesktop(props: Props): JSX.Element;
+}
+
+declare module '@theme/DocSidebar/Desktop/Content' {
+  import type {PropSidebarItem} from '@docusaurus/plugin-content-docs';
+
+  export interface Props {
+    readonly className?: string;
+    readonly path: string;
+    readonly sidebar: readonly PropSidebarItem[];
+  }
+
+  export default function CollapseButton(props: Props): JSX.Element;
+}
+
+declare module '@theme/DocSidebar/Desktop/CollapseButton' {
+  export interface Props {
+    onClick: React.MouseEventHandler;
+  }
+
+  export default function CollapseButton(props: Props): JSX.Element;
+}
+
 declare module '@theme/DocSidebarItem' {
   import type {PropSidebarItem} from '@docusaurus/plugin-content-docs';
 
diff --git a/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/CollapseButton/index.tsx b/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/CollapseButton/index.tsx
new file mode 100644
index 0000000000..c902ac90d6
--- /dev/null
+++ b/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/CollapseButton/index.tsx
@@ -0,0 +1,38 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import React from 'react';
+import clsx from 'clsx';
+import IconArrow from '@theme/IconArrow';
+import {translate} from '@docusaurus/Translate';
+import type {Props} from '@theme/DocSidebar/Desktop/CollapseButton';
+
+import styles from './styles.module.css';
+
+export default function CollapseButton({onClick}: Props): JSX.Element {
+  return (
+    <button
+      type="button"
+      title={translate({
+        id: 'theme.docs.sidebar.collapseButtonTitle',
+        message: 'Collapse sidebar',
+        description: 'The title attribute for collapse button of doc sidebar',
+      })}
+      aria-label={translate({
+        id: 'theme.docs.sidebar.collapseButtonAriaLabel',
+        message: 'Collapse sidebar',
+        description: 'The title attribute for collapse button of doc sidebar',
+      })}
+      className={clsx(
+        'button button--secondary button--outline',
+        styles.collapseSidebarButton,
+      )}
+      onClick={onClick}>
+      <IconArrow className={styles.collapseSidebarButtonIcon} />
+    </button>
+  );
+}
diff --git a/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/CollapseButton/styles.module.css b/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/CollapseButton/styles.module.css
new file mode 100644
index 0000000000..4e225b0bdd
--- /dev/null
+++ b/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/CollapseButton/styles.module.css
@@ -0,0 +1,44 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+:root {
+  --collapse-button-bg-color-dark: #2e333a;
+}
+
+@media (min-width: 997px) {
+  .collapseSidebarButton {
+    display: block !important;
+    background-color: var(--ifm-button-background-color);
+    height: 40px;
+    position: sticky;
+    bottom: 0;
+    border-radius: 0;
+    border: 1px solid var(--ifm-toc-border-color);
+  }
+
+  .collapseSidebarButtonIcon {
+    transform: rotate(180deg);
+    margin-top: 4px;
+  }
+
+  [dir='rtl'] .collapseSidebarButtonIcon {
+    transform: rotate(0);
+  }
+
+  [data-theme='dark'] .collapseSidebarButton {
+    background-color: var(--collapse-button-bg-color-dark);
+  }
+
+  [data-theme='dark'] .collapseSidebarButton:hover,
+  [data-theme='dark'] .collapseSidebarButton:focus {
+    background-color: var(--ifm-color-emphasis-200);
+  }
+}
+
+.collapseSidebarButton {
+  display: none;
+}
diff --git a/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/Content/index.tsx b/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/Content/index.tsx
new file mode 100644
index 0000000000..f72a9c27a3
--- /dev/null
+++ b/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/Content/index.tsx
@@ -0,0 +1,55 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import React, {useState} from 'react';
+import clsx from 'clsx';
+import {
+  ThemeClassNames,
+  useAnnouncementBar,
+  useScrollPosition,
+} from '@docusaurus/theme-common';
+import DocSidebarItems from '@theme/DocSidebarItems';
+import type {Props} from '@theme/DocSidebar/Desktop/Content';
+
+import styles from './styles.module.css';
+
+function useShowAnnouncementBar() {
+  const {isActive} = useAnnouncementBar();
+  const [showAnnouncementBar, setShowAnnouncementBar] = useState(isActive);
+
+  useScrollPosition(
+    ({scrollY}) => {
+      if (isActive) {
+        setShowAnnouncementBar(scrollY === 0);
+      }
+    },
+    [isActive],
+  );
+  return isActive && showAnnouncementBar;
+}
+
+export default function DocSidebarDesktopContent({
+  path,
+  sidebar,
+  className,
+}: Props): JSX.Element {
+  const showAnnouncementBar = useShowAnnouncementBar();
+
+  return (
+    <nav
+      className={clsx(
+        'menu thin-scrollbar',
+        styles.menu,
+        showAnnouncementBar && styles.menuWithAnnouncementBar,
+        className,
+      )}>
+      <ul className={clsx(ThemeClassNames.docs.docSidebarMenu, 'menu__list')}>
+        <DocSidebarItems items={sidebar} activePath={path} level={1} />
+      </ul>
+    </nav>
+  );
+}
diff --git a/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/Content/styles.module.css b/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/Content/styles.module.css
new file mode 100644
index 0000000000..1ee104b73a
--- /dev/null
+++ b/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/Content/styles.module.css
@@ -0,0 +1,17 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+@media (min-width: 997px) {
+  .menu {
+    flex-grow: 1;
+    padding: 0.5rem;
+  }
+
+  .menuWithAnnouncementBar {
+    margin-bottom: var(--docusaurus-announcement-bar-height);
+  }
+}
diff --git a/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/index.tsx b/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/index.tsx
new file mode 100644
index 0000000000..b2b9357d91
--- /dev/null
+++ b/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/index.tsx
@@ -0,0 +1,38 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import React from 'react';
+import clsx from 'clsx';
+import {useThemeConfig} from '@docusaurus/theme-common';
+import Logo from '@theme/Logo';
+import CollapseButton from '@theme/DocSidebar/Desktop/CollapseButton';
+import Content from '@theme/DocSidebar/Desktop/Content';
+import type {Props} from '@theme/DocSidebar/Desktop';
+
+import styles from './styles.module.css';
+
+function DocSidebarDesktop({path, sidebar, onCollapse, isHidden}: Props) {
+  const {
+    navbar: {hideOnScroll},
+    hideableSidebar,
+  } = useThemeConfig();
+
+  return (
+    <div
+      className={clsx(
+        styles.sidebar,
+        hideOnScroll && styles.sidebarWithHideableNavbar,
+        isHidden && styles.sidebarHidden,
+      )}>
+      {hideOnScroll && <Logo tabIndex={-1} className={styles.sidebarLogo} />}
+      <Content path={path} sidebar={sidebar} />
+      {hideableSidebar && <CollapseButton onClick={onCollapse} />}
+    </div>
+  );
+}
+
+export default React.memo(DocSidebarDesktop);
diff --git a/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/styles.module.css b/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/styles.module.css
new file mode 100644
index 0000000000..8d7734af15
--- /dev/null
+++ b/packages/docusaurus-theme-classic/src/theme/DocSidebar/Desktop/styles.module.css
@@ -0,0 +1,50 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+@media (min-width: 997px) {
+  .sidebar {
+    display: flex;
+    flex-direction: column;
+    max-height: 100vh;
+    height: 100%;
+    position: sticky;
+    top: 0;
+    padding-top: var(--ifm-navbar-height);
+    width: var(--doc-sidebar-width);
+    transition: opacity 50ms ease;
+  }
+
+  .sidebarWithHideableNavbar {
+    padding-top: 0;
+  }
+
+  .sidebarHidden {
+    opacity: 0;
+    height: 0;
+    overflow: hidden;
+    visibility: hidden;
+  }
+
+  .sidebarLogo {
+    display: flex !important;
+    align-items: center;
+    margin: 0 var(--ifm-navbar-padding-horizontal);
+    min-height: var(--ifm-navbar-height);
+    max-height: var(--ifm-navbar-height);
+    color: inherit !important;
+    text-decoration: none !important;
+  }
+
+  .sidebarLogo img {
+    margin-right: 0.5rem;
+    height: 2rem;
+  }
+}
+
+.sidebarLogo {
+  display: none;
+}
diff --git a/packages/docusaurus-theme-classic/src/theme/DocSidebar/Mobile/index.tsx b/packages/docusaurus-theme-classic/src/theme/DocSidebar/Mobile/index.tsx
new file mode 100644
index 0000000000..30f23afbf8
--- /dev/null
+++ b/packages/docusaurus-theme-classic/src/theme/DocSidebar/Mobile/index.tsx
@@ -0,0 +1,51 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import React from 'react';
+import clsx from 'clsx';
+import {
+  MobileSecondaryMenuFiller,
+  type MobileSecondaryMenuComponent,
+  ThemeClassNames,
+} from '@docusaurus/theme-common';
+import DocSidebarItems from '@theme/DocSidebarItems';
+import type {Props} from '@theme/DocSidebar/Mobile';
+
+// eslint-disable-next-line react/function-component-definition
+const DocSidebarMobileSecondaryMenu: MobileSecondaryMenuComponent<Props> = ({
+  toggleSidebar,
+  sidebar,
+  path,
+}) => (
+  <ul className={clsx(ThemeClassNames.docs.docSidebarMenu, 'menu__list')}>
+    <DocSidebarItems
+      items={sidebar}
+      activePath={path}
+      onItemClick={(item) => {
+        // Mobile sidebar should only be closed if the category has a link
+        if (item.type === 'category' && item.href) {
+          toggleSidebar();
+        }
+        if (item.type === 'link') {
+          toggleSidebar();
+        }
+      }}
+      level={1}
+    />
+  </ul>
+);
+
+function DocSidebarMobile(props: Props) {
+  return (
+    <MobileSecondaryMenuFiller
+      component={DocSidebarMobileSecondaryMenu}
+      props={props}
+    />
+  );
+}
+
+export default React.memo(DocSidebarMobile);
diff --git a/packages/docusaurus-theme-classic/src/theme/DocSidebar/index.tsx b/packages/docusaurus-theme-classic/src/theme/DocSidebar/index.tsx
index 5e727e2c46..5bbd9e2eb7 100644
--- a/packages/docusaurus-theme-classic/src/theme/DocSidebar/index.tsx
+++ b/packages/docusaurus-theme-classic/src/theme/DocSidebar/index.tsx
@@ -5,126 +5,11 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-import React, {useState} from 'react';
-import clsx from 'clsx';
-import {
-  useThemeConfig,
-  useAnnouncementBar,
-  MobileSecondaryMenuFiller,
-  type MobileSecondaryMenuComponent,
-  ThemeClassNames,
-  useScrollPosition,
-  useWindowSize,
-} from '@docusaurus/theme-common';
-import Logo from '@theme/Logo';
-import IconArrow from '@theme/IconArrow';
-import {translate} from '@docusaurus/Translate';
-import DocSidebarItems from '@theme/DocSidebarItems';
+import React from 'react';
+import {useWindowSize} from '@docusaurus/theme-common';
 import type {Props} from '@theme/DocSidebar';
-
-import styles from './styles.module.css';
-
-function useShowAnnouncementBar() {
-  const {isActive} = useAnnouncementBar();
-  const [showAnnouncementBar, setShowAnnouncementBar] = useState(isActive);
-
-  useScrollPosition(
-    ({scrollY}) => {
-      if (isActive) {
-        setShowAnnouncementBar(scrollY === 0);
-      }
-    },
-    [isActive],
-  );
-  return isActive && showAnnouncementBar;
-}
-
-function HideableSidebarButton({onClick}: {onClick: React.MouseEventHandler}) {
-  return (
-    <button
-      type="button"
-      title={translate({
-        id: 'theme.docs.sidebar.collapseButtonTitle',
-        message: 'Collapse sidebar',
-        description: 'The title attribute for collapse button of doc sidebar',
-      })}
-      aria-label={translate({
-        id: 'theme.docs.sidebar.collapseButtonAriaLabel',
-        message: 'Collapse sidebar',
-        description: 'The title attribute for collapse button of doc sidebar',
-      })}
-      className={clsx(
-        'button button--secondary button--outline',
-        styles.collapseSidebarButton,
-      )}
-      onClick={onClick}>
-      <IconArrow className={styles.collapseSidebarButtonIcon} />
-    </button>
-  );
-}
-
-function DocSidebarDesktop({path, sidebar, onCollapse, isHidden}: Props) {
-  const showAnnouncementBar = useShowAnnouncementBar();
-  const {
-    navbar: {hideOnScroll},
-    hideableSidebar,
-  } = useThemeConfig();
-
-  return (
-    <div
-      className={clsx(styles.sidebar, {
-        [styles.sidebarWithHideableNavbar!]: hideOnScroll,
-        [styles.sidebarHidden!]: isHidden,
-      })}>
-      {hideOnScroll && <Logo tabIndex={-1} className={styles.sidebarLogo} />}
-      <nav
-        className={clsx('menu thin-scrollbar', styles.menu, {
-          [styles.menuWithAnnouncementBar!]: showAnnouncementBar,
-        })}>
-        <ul className={clsx(ThemeClassNames.docs.docSidebarMenu, 'menu__list')}>
-          <DocSidebarItems items={sidebar} activePath={path} level={1} />
-        </ul>
-      </nav>
-      {hideableSidebar && <HideableSidebarButton onClick={onCollapse} />}
-    </div>
-  );
-}
-
-// eslint-disable-next-line react/function-component-definition
-const DocSidebarMobileSecondaryMenu: MobileSecondaryMenuComponent<Props> = ({
-  toggleSidebar,
-  sidebar,
-  path,
-}) => (
-  <ul className={clsx(ThemeClassNames.docs.docSidebarMenu, 'menu__list')}>
-    <DocSidebarItems
-      items={sidebar}
-      activePath={path}
-      onItemClick={(item) => {
-        // Mobile sidebar should only be closed if the category has a link
-        if (item.type === 'category' && item.href) {
-          toggleSidebar();
-        }
-        if (item.type === 'link') {
-          toggleSidebar();
-        }
-      }}
-      level={1}
-    />
-  </ul>
-);
-
-function DocSidebarMobile(props: Props) {
-  return (
-    <MobileSecondaryMenuFiller
-      component={DocSidebarMobileSecondaryMenu}
-      props={props}
-    />
-  );
-}
-
-const DocSidebarDesktopMemo = React.memo(DocSidebarDesktop);
-const DocSidebarMobileMemo = React.memo(DocSidebarMobile);
+import DocSidebarDesktop from '@theme/DocSidebar/Desktop';
+import DocSidebarMobile from '@theme/DocSidebar/Mobile';
 
 export default function DocSidebar(props: Props): JSX.Element {
   const windowSize = useWindowSize();
@@ -138,8 +23,8 @@ export default function DocSidebar(props: Props): JSX.Element {
 
   return (
     <>
-      {shouldRenderSidebarDesktop && <DocSidebarDesktopMemo {...props} />}
-      {shouldRenderSidebarMobile && <DocSidebarMobileMemo {...props} />}
+      {shouldRenderSidebarDesktop && <DocSidebarDesktop {...props} />}
+      {shouldRenderSidebarMobile && <DocSidebarMobile {...props} />}
     </>
   );
 }
diff --git a/packages/docusaurus-theme-classic/src/theme/DocSidebar/styles.module.css b/packages/docusaurus-theme-classic/src/theme/DocSidebar/styles.module.css
deleted file mode 100644
index 101dcd45d5..0000000000
--- a/packages/docusaurus-theme-classic/src/theme/DocSidebar/styles.module.css
+++ /dev/null
@@ -1,107 +0,0 @@
-/**
- * Copyright (c) Facebook, Inc. and its affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-:root {
-  --collapse-button-bg-color-dark: #2e333a;
-}
-
-@media (min-width: 997px) {
-  .sidebar {
-    display: flex;
-    flex-direction: column;
-    max-height: 100vh;
-    height: 100%;
-    position: sticky;
-    top: 0;
-    padding-top: var(--ifm-navbar-height);
-    width: var(--doc-sidebar-width);
-    transition: opacity 50ms ease;
-  }
-
-  .sidebarWithHideableNavbar {
-    padding-top: 0;
-  }
-
-  .sidebarHidden {
-    opacity: 0;
-    height: 0;
-    overflow: hidden;
-    visibility: hidden;
-  }
-
-  .sidebarLogo {
-    display: flex !important;
-    align-items: center;
-    margin: 0 var(--ifm-navbar-padding-horizontal);
-    min-height: var(--ifm-navbar-height);
-    max-height: var(--ifm-navbar-height);
-    color: inherit !important;
-    text-decoration: none !important;
-  }
-
-  .sidebarLogo img {
-    margin-right: 0.5rem;
-    height: 2rem;
-  }
-
-  .menu {
-    flex-grow: 1;
-    padding: 0.5rem;
-  }
-
-  .menuWithAnnouncementBar {
-    margin-bottom: var(--docusaurus-announcement-bar-height);
-  }
-
-  .collapseSidebarButton {
-    display: block !important;
-    background-color: var(--ifm-button-background-color);
-    height: 40px;
-    position: sticky;
-    bottom: 0;
-    border-radius: 0;
-    border: 1px solid var(--ifm-toc-border-color);
-  }
-
-  .collapseSidebarButtonIcon {
-    transform: rotate(180deg);
-    margin-top: 4px;
-  }
-
-  [dir='rtl'] .collapseSidebarButtonIcon {
-    transform: rotate(0);
-  }
-
-  [data-theme='dark'] .collapseSidebarButton {
-    background-color: var(--collapse-button-bg-color-dark);
-  }
-
-  [data-theme='dark'] .collapseSidebarButton:hover,
-  [data-theme='dark'] .collapseSidebarButton:focus {
-    background-color: var(--ifm-color-emphasis-200);
-  }
-}
-
-.sidebarLogo,
-.collapseSidebarButton {
-  display: none;
-}
-
-.sidebarMenuIcon {
-  vertical-align: middle;
-}
-
-.sidebarMenuCloseIcon {
-  display: inline-flex;
-  justify-content: center;
-  align-items: center;
-  height: 24px;
-  font-size: 1.5rem;
-  font-weight: var(--ifm-font-weight-bold);
-  line-height: 0.9;
-  width: 24px;
-}
diff --git a/project-words.txt b/project-words.txt
index 7b4d8c4c10..f3b7bb87e3 100644
--- a/project-words.txt
+++ b/project-words.txt
@@ -38,6 +38,7 @@ chedeau
 cheng
 clément
 clsx
+codeql
 codespaces
 codesandbox
 contravariance
diff --git a/website/src/theme/DocSidebar/Desktop/Content/index.js b/website/src/theme/DocSidebar/Desktop/Content/index.js
new file mode 100644
index 0000000000..1096f37716
--- /dev/null
+++ b/website/src/theme/DocSidebar/Desktop/Content/index.js
@@ -0,0 +1,30 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import React from 'react';
+import Content from '@theme-original/DocSidebar/Desktop/Content';
+import {useLocation} from '@docusaurus/router';
+
+function SidebarAd() {
+  return (
+    <div style={{border: 'solid thin red', padding: 10, textAlign: 'center'}}>
+      Sidebar Ad
+    </div>
+  );
+}
+
+export default function ContentWrapper(props) {
+  const {pathname} = useLocation();
+  const shouldShowSidebarAd = pathname.includes('/tests/');
+  return (
+    <>
+      {shouldShowSidebarAd && <SidebarAd />}
+      <Content {...props} />
+      {shouldShowSidebarAd && <SidebarAd />}
+    </>
+  );
+}