ert.equal(origCss, window.ShadyCSS.nativeCss);
          assert.equal(origShady, window.ShadyCSS.nativeShadow);
          assert.equal(origCssBuild, window.ShadyCSS.cssBuild);
          let script = document.createElement('script');
          script.src =
            '../node_modules/@webcomponents/shadycss/scoping-shim.min.js';
          script.onerrer = (err) => done(err);
          script.onload = () => {
            assert.equal(origCss, window.ShadyCSS.nativeCss);
            assert.equal(origShady, wi