xt = rules[12].cssText;
    let rule = rules[12];
    assert_equals(text.indexOf("override-colors"), -1);
    assert_equals(rule.overrideColors, "");
});

test(function() {
    let text = rules[13].cssText;
    let rule = rules[13];
    // I see nothing in the spec that indicates an empty string is a parse error.
    assert_not_equals(text.indexOf("font-family"), -1);
});

test(function() {
    let text = rules[14].cssText;
    let rule = rules[14];
    assert_equals(text.indexOf("base-palette"), -1);
    a