px 20px 30px;
      }
    </style>
  </head>
  <body>
    <script>
      'use strict';

      // Distinct length of track list.
      test_no_interpolation({
        property: 'grid-template-columns',
        from: "1fr 1fr 1fr",
        to: "2fr 2fr"
      });

      test_no_interpolation({
        property: 'grid-template-columns',
        from: "10px 20px 30px",
        to: "20px 30px"
      });

      test_no_interpolation({
        property: 'grid-template-columns',
        from: "1fr 1fr 1fr",
       