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+++ b/testing/web-platform/tests/css/css-cascade/revert-layer-007.html
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+<!DOCTYPE html>
+<title>CSS Cascade Layers: 'revert-layer' chain</title>
+<link rel="help" href="https://drafts.csswg.org/css-cascade-5/#revert-layer">
+<link rel="author" href="mailto:xiaochengh@chromium.org">
+<link rel="match" href="reference/ref-filled-green-100px-square.xht">
+
+<style>
+#target {
+  width: 100px;
+  height: 100px;
+}
+
+@layer {
+  #target { background-color: green; }
+}
+
+@layer {
+  #target {
+    background-color: red;
+    background-color: revert-layer;
+  }
+}
+
+@layer {
+  #target {
+    background-color: red;
+    background-color: revert-layer;
+  }
+}
+
+@layer {
+  #target {
+    background-color: red;
+    background-color: revert-layer;
+  }
+}
+</style>
+
+<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
+<div id="target"></div>