diff --git a/packages/edit-site/src/components/layout/router.js b/packages/edit-site/src/components/layout/router.js
index 20d5b463852ff3..8d9e14db92a9fa 100644
--- a/packages/edit-site/src/components/layout/router.js
+++ b/packages/edit-site/src/components/layout/router.js
@@ -3,7 +3,7 @@
  */
 import { privateApis as routerPrivateApis } from '@wordpress/router';
 import { __ } from '@wordpress/i18n';
-
+import { useEffect } from '@wordpress/element';
 /**
  * Internal dependencies
  */
@@ -33,6 +33,14 @@ export default function useLayoutAreas() {
 	const { params } = useLocation();
 	const { postType, postId, path, layout, isCustom, canvas } = params;
 
+	useEffect( () => {
+		// `/wp_template_part/all` path is no longer used and redirects to
+		// Patterns page for backward compatibility.
+		if ( path === '/wp_template_part/all' ) {
+			history.replace( { path: '/patterns' } );
+		}
+	}, [ history, path ] );
+
 	// Note: Since "sidebar" is not yet supported here,
 	// returning undefined from "mobile" means show the sidebar.
 
@@ -140,10 +148,9 @@ export default function useLayoutAreas() {
 		};
 	}
 
-	/* Patterns and Template Parts
-	 * `/wp_template_part/all` path is no longer used, but uses Patterns page screens for
-	 * backwards compatibility.
-	 */
+	// Patterns
+	// `/wp_template_part/all` path is no longer used and redirects to
+	// Patterns page for backward compatibility.
 	if ( path === '/patterns' || path === '/wp_template_part/all' ) {
 		return {
 			key: 'patterns',
diff --git a/packages/edit-site/src/components/sidebar-navigation-screen-patterns/index.js b/packages/edit-site/src/components/sidebar-navigation-screen-patterns/index.js
index ee01a427e6dc91..9c8681b86dbf37 100644
--- a/packages/edit-site/src/components/sidebar-navigation-screen-patterns/index.js
+++ b/packages/edit-site/src/components/sidebar-navigation-screen-patterns/index.js
@@ -125,18 +125,6 @@ export default function SidebarNavigationScreenPatterns( { backPath } ) {
 		[]
 	);
 
-	/**
-	 * This sidebar needs to temporarily accomodate two different "URLs":
-	 *
-	 * 1. path = /patterns
-	 *    Block based themes. Also classic themes can access this URL, though it's not linked anywhere.
-	 *
-	 * 2. path = /wp_template_part/all
-	 *    Classic themes with support for block-template-parts. We need to list only Template Parts in this case.
-	 *    The URL is accessible from the Appearance > Template Parts menu.
-	 *
-	 * This is temporary. We aim to consolidate to /patterns.
-	 */
 	return (
 		<SidebarNavigationScreen
 			isRoot={ ! isBlockBasedTheme }
diff --git a/packages/edit-site/src/utils/get-is-list-page.js b/packages/edit-site/src/utils/get-is-list-page.js
index 0fa818c28cb510..f7312ec3c1c292 100644
--- a/packages/edit-site/src/utils/get-is-list-page.js
+++ b/packages/edit-site/src/utils/get-is-list-page.js
@@ -14,9 +14,7 @@ export default function getIsListPage(
 	isMobileViewport
 ) {
 	return (
-		[ '/wp_template', '/wp_template_part/all', '/pages' ].includes(
-			path
-		) ||
+		[ '/wp_template', '/pages' ].includes( path ) ||
 		( path === '/patterns' &&
 			// Don't treat "/patterns" without categoryType and categoryId as a
 			// list page in mobile because the sidebar covers the whole page.
diff --git a/test/e2e/specs/site-editor/hybrid-theme.spec.js b/test/e2e/specs/site-editor/hybrid-theme.spec.js
index ea22349f5b7eb8..1f73b6de6f486a 100644
--- a/test/e2e/specs/site-editor/hybrid-theme.spec.js
+++ b/test/e2e/specs/site-editor/hybrid-theme.spec.js
@@ -23,7 +23,7 @@ test.describe( 'Hybrid theme', () => {
 		).toBeVisible();
 	} );
 
-	test( 'should show Patterns page when accessing template parts list page', async ( {
+	test( 'should redirect to Patterns page when accessing template parts list page', async ( {
 		admin,
 		page,
 	} ) => {
@@ -32,6 +32,10 @@ test.describe( 'Hybrid theme', () => {
 			'path=/wp_template_part/all'
 		);
 
+		await expect( page ).toHaveURL(
+			'/wp-admin/site-editor.php?path=%2Fpatterns'
+		);
+
 		await expect(
 			page.getByRole( 'heading', { level: 1, text: 'Patterns' } )
 		).toBeVisible();