 assertComputed(styled.$.child.$.mixin6, '16px');
    assertComputed(styled.$.child.$.mixin7, '17px');
  });

  test('mixins with new `@apply --foo` syntax', function() {
    assertComputed(styled.$.child.$.mixin8, '17px');
  });

  test('mixins can be realiased with var()', function() {
    assertComputed(styled.$.child.$.mixin9, '17px');
  });

  test('mixins apply to @keyframe rules', function(done) {
    if (navigator.userAgent.match('Edge/16') && (!window.ShadyCSS || window.ShadyCSS.nativeCss)) {
     