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+<!doctype html>
+<title>CSS Selectors nested invalidation on changed parent</title>
+<link rel="author" title="Steinar H. Gunderson" href="mailto:sesse@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-nesting-1/">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<style>
+ .b {
+ color: red;
+ }
+ .a {
+ & .b {
+ color: green;
+ }
+ }
+</style>
+
+<div id="container">
+ <div id="child" class="b">
+ Test passes if color is green.
+ </div>
+</div>
+
+<script>
+ test(() => {
+ let container = document.getElementById('container');
+ let child = document.getElementById('child');
+ assert_equals(getComputedStyle(child).color, 'rgb(255, 0, 0)');
+ container.classList.add('a');
+ assert_equals(getComputedStyle(child).color, 'rgb(0, 128, 0)');
+ });
+</script>