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+++ b/testing/web-platform/tests/css/css-paint-api/paint-function-this-value.https.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+<meta charset="utf-8">
+<title>Paint callback is invoked with `this` value of `paintInstance`</title>
+<link rel="help" href="https://drafts.css-houdini.org/css-paint-api-1/#invoke-a-paint-callback">
+<link rel="match" href="parse-input-arguments-ref.html">
+<style>
+.container {
+  width: 100px;
+  height: 100px;
+}
+
+#canvas-geometry {
+  background-image: paint(geometry);
+}
+</style>
+<script src="/common/reftest-wait.js"></script>
+<script src="/common/worklet-reftest.js"></script>
+<body>
+<div id="canvas-geometry" class="container"></div>
+
+<script id="code" type="text/worklet">
+let paintInstance;
+
+registerPaint('geometry', class {
+    constructor() {
+        paintInstance = this;
+    }
+    paint(ctx, geom) {
+        if (this === paintInstance)
+            ctx.fillStyle = 'green';
+        else
+            ctx.fillStyle = 'red';
+        ctx.fillRect(0, 0, geom.width, geom.height);
+    }
+});
+</script>
+
+<script>
+    importWorkletAndTerminateTestAfterAsyncPaint(CSS.paintWorklet, document.getElementById('code').textContent);
+</script>
+</body>
+</html>