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diff --git a/testing/web-platform/tests/animation-worklet/worklet-animation-with-non-ascii-name.https.html b/testing/web-platform/tests/animation-worklet/worklet-animation-with-non-ascii-name.https.html
new file mode 100644
index 0000000000..d3a3f4ad35
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+++ b/testing/web-platform/tests/animation-worklet/worklet-animation-with-non-ascii-name.https.html
@@ -0,0 +1,59 @@
+<html class="reftest-wait">
+<title>WorkletAnimation name should accept non-ASCII characters</title>
+<link rel="help" href="https://drafts.css-houdini.org/css-animationworklet/">
+<meta name="assert" content="Worklet Animation name should accept non-ASCII characters">
+<link rel="match" href="worklet-animation-with-non-ascii-name-ref.html">
+
+<script src="/web-animations/testcommon.js"></script>
+<script src="/common/reftest-wait.js"></script>
+<script src="common.js"></script>
+
+<style>
+  .box {
+    width: 100px;
+    height: 100px;
+    background-color: green;
+  }
+</style>
+
+<div id="t0" class="box"></div>
+<div id="t1" class="box"></div>
+<script id="visual_update"  type="text/worklet">
+  registerAnimator('bob', class {
+    animate(currentTime, effect) {
+      effect.localTime = 250;
+    }
+  });
+  registerAnimator('東京', class {
+    animate(currentTime, effect) {
+      effect.localTime = 750;
+    }
+  });
+</script>
+<script>
+  runInAnimationWorklet(
+    document.getElementById('visual_update').textContent
+  ).then(() => {
+    const keyframes = [
+      {transform: 'translateX(0)' },
+      {transform: 'translateX(200px)' }
+    ];
+    const options = {
+      duration: 1000
+    };
+    const $t0 = document.getElementById('t0');
+    const $t0_effect = new KeyframeEffect($t0, keyframes, options);
+    const $t0_animation = new WorkletAnimation('bob', $t0_effect);
+
+    const $t1 = document.getElementById('t1');
+    const $t1_effect = new KeyframeEffect($t1, keyframes, options);
+    const $t1_animation = new WorkletAnimation('東京', $t1_effect);
+
+    $t0_animation.play();
+    $t1_animation.play();
+
+    waitForAsyncAnimationFrames(1).then(_ => {
+      takeScreenshot();
+    });
+  });
+</script>