diff --git a/test/e2e/specs/site-editor/navigation.spec.js b/test/e2e/specs/site-editor/navigation.spec.js
index 18eb6c9904b44..2a886c2048f88 100644
--- a/test/e2e/specs/site-editor/navigation.spec.js
+++ b/test/e2e/specs/site-editor/navigation.spec.js
@@ -106,6 +106,23 @@ test.describe( 'Site editor navigation', () => {
 		// We should have our editor canvas button back
 		await expect( editorCanvasButton ).toBeVisible();
 	} );
+
+	test( 'Should show 404 page when navigating to non-existent template', async ( {
+		admin,
+		page,
+	} ) => {
+		// Navigate to a non-existent template.
+		await admin.visitAdminPage( 'site-editor.php', 'p=/template-foo-bar' );
+
+		// Verify the 404 error notice is displayed with the correct message.
+		await expect(
+			page.locator(
+				'.edit-site-layout__area .components-notice__content'
+			)
+		).toHaveText(
+			'The requested page could not be found. Please check the URL.'
+		);
+	} );
 } );
 
 class EditorNavigationUtils {