Try using close sidebar button

This is instead of the toggle sidebar button

tests/e2e/blocks/audio-video.spec.js

@@ -19,9 +19,9 @@ const MP3_TEST = 'https://www.greenpeace.org/static/planet4-assets/tests/wochens
 const addVideoOrAudioBlock = async ({page}, mediaType, mediaLink) => {
   await searchAndInsertBlock({page}, mediaType, mediaType);
   // We should close the sidebar before editing the block.
-  const toggleSidebar = await page.getByRole('button', {name: 'Toggle block inserter'});
-  if (await toggleSidebar.getAttribute('aria-expanded') === 'true') {
-    await toggleSidebar.click();
+  const closeSidebar = await page.getByRole('button', {name: 'Close block inserter'});
+  if (await closeSidebar.isVisible()) {
+    await closeSidebar.click();
   }
   await page.getByRole('button', {name: 'Insert from URL'}).click();
   await page.getByPlaceholder('Paste or type URL').fill(mediaLink);