message: Add wait for unpack with a zip upload.
diff: @@ -49,6 +49,8 @@ const TesterGetZipUploadUrlMutation = `
  }
  `;
  +const UNPACK_WAIT = 2500;
  +
  // Get all paths in rootDir, starting at dirname.
  // We don't want the paths to include rootDir -- so if rootDir = storybook-static,
  // paths will be like iframe.html rather than storybook-static/iframe.html
  @@ -200,6 +202,8 @@ async function uploadAsZipFile(ctx, task) {
  ctx.uploadedBytes = total;
  ctx.isolatorUrl = new URL('/iframe.html', domain).toString();
  +
  + return new Promise((resolve, _) => setTimeout(resolve, UNPACK_WAIT));
  }
  export const uploadStorybook = async (ctx, task) => {
  