v::after {
          content: 'test';
          background-color: var(--bg);
        }
      </style>
      <div></div>
    </template>
    <script>
      suite('Workarounds', function () {
        test('Edge 15', function () {
          makeElement('x-bug');
          let el = document.createElement('x-bug');
          document.body.appendChild(el);
          let div = el.shadowRoot.querySelector('div');
          assert.notEqual(
            getComputedStyle(div).getPropertyValue('background-color').trim(