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--- a/testing/web-platform/tests/css/css-pseudo/highlight-cascade-002.html
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@@ -1,120 +0,0 @@
-<!doctype html>
-<meta charset="utf-8">
-<title>CSS Pseudo-Elements Test: highlight cascade: custom properties are inherited regardless of inherits flag or inheritedness of referencing property</title>
-<link rel="author" title="Delan Azabani" href="mailto:dazabani@igalia.com">
-<link rel="help" href="https://drafts.csswg.org/css-pseudo-4/#highlight-cascade">
-<link rel="match" href="highlight-cascade-002-ref.html">
-<meta name="assert" value="This test verifies that, given ::selection styles referencing custom properties, their substitution values are inherited from the parent ::selection styles, even if the property is registered with inherits set to false (--inherits-false) or the referencing property is not an inherited property (background-color). All custom properties are treated as inherited when used in highlight styles in any way.">
-<script src="support/selections.js"></script>
-<link rel="stylesheet" href="support/highlights.css">
-<style>
-    /*
-        Register the custom properties, other than --unregistered,
-        which would be an inherited property [css-variables-1].
-    */
-    @property --control {
-        syntax: "<color>";
-        initial-value: green;
-        inherits: false;
-    }
-    @property --inherits-false {
-        syntax: "<color>";
-        initial-value: red;
-        inherits: false;
-    }
-    @property --inherits-true {
-        syntax: "<color>";
-        initial-value: red;
-        inherits: true;
-    }
-
-    main {
-        font-size: 7em;
-        margin: 0.5em;
-    }
-    main::selection {
-        /*
-            Don’t visibly highlight the spaces between words.
-        */
-        color: black;
-        background-color: transparent;
-    }
-
-    /*
-        Non-highlight control: if this text is white on red (inherit)
-        rather than white on green (initial), then @property is not
-        supported well enough to make this test meaningful.
-    */
-    main > .control {
-        --control: red;
-    }
-    main > .control > span {
-        color: white;
-        background-color: var(--control);
-    }
-
-    main > *::selection {
-        --inherits-false: green;
-        --inherits-true: green;
-        --unregistered: green;
-    }
-
-    /*
-        Foreground tests: if the foreground of this text is red or
-        black (initial) rather than green (inherit), then custom
-        properties are not being inherited in highlight styles.
-
-        color is an inherited property, but that shouldn’t matter.
-    */
-    main > .fg > span::selection {
-        background-color: white;
-    }
-    main > .fg.inherits-false > span::selection {
-        color: var(--inherits-false);
-    }
-    main > .fg.inherits-true > span::selection {
-        color: var(--inherits-true);
-    }
-    main > .fg.unregistered > span::selection {
-        color: var(--unregistered);
-    }
-
-    /*
-        Background tests: if the background of this text is red or
-        black (initial) rather than green (inherit), then custom
-        properties are not being inherited in highlight styles.
-
-        background-color is not an inherited property, but that
-        shouldn’t matter.
-    */
-    main > .bg > span::selection {
-        color: white;
-    }
-    main > .bg.inherits-false > span::selection {
-        background-color: var(--inherits-false);
-    }
-    main > .bg.inherits-true > span::selection {
-        background-color: var(--inherits-true);
-    }
-    main > .bg.unregistered > span::selection {
-        background-color: var(--unregistered);
-    }
-</style>
-<p>Test passes if the words below are (respectively): white on green, green on white, white on green.
-<main class="highlight_reftest"
-    ><span class="control"><span>foo</span></span
-    > <span class="fg inherits-false"><span>b</span></span
-    ><span class="fg inherits-true"><span>a</span></span
-    ><span class="fg unregistered"><span>r</span></span
-    > <span class="bg inherits-false"><span>b</span></span
-    ><span class="bg inherits-true"><span>a</span></span
-    ><span class="bg unregistered"><span>z</span></span
-    ></main>
-<script>
-    const main = document.querySelector("main");
-    selectRangeWith(range => {
-        range.selectNodeContents(main);
-        range.setStart(main, 2);
-        range.setEnd(main, 9);
-    });
-</script>