this.shadowRoot.append(myTemplate.content.cloneNode(true));
      }

      get slot() {
        return this.shadowRoot.querySelector('slot');
      }
    });

    const blue = 'rgb(0, 0, 255)';
    const green = 'rgb(0, 255, 0)';
    test(function (t) {
      const test = document.getElementById('test');
      const target = test.shadowRoot.getElementById('target');
      t.add_cleanup(() => { test.innerHTML = 'Test' });
      let styles = getComputedStyle(target);
      assert_equals(styles.getPropertyValu