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diff --git a/tests/wpt/web-platform-tests/clipboard-apis/text-write-read/async-write-readText-manual.https.html b/tests/wpt/web-platform-tests/clipboard-apis/text-write-read/async-write-readText-manual.https.html
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+++ b/tests/wpt/web-platform-tests/clipboard-apis/text-write-read/async-write-readText-manual.https.html
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+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>
+  Async Clipboard write ([text/plain ClipboardItem]) -> readText tests
+</title>
+<link rel="help" href="https://w3c.github.io/clipboard-apis/#async-clipboard-api">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+async function readWriteTest(textInput) {
+  promise_test(async t => {
+    const blobInput = new Blob([textInput], {type: 'text/plain'});
+    const clipboardItem = new ClipboardItem({'text/plain': blobInput});
+
+    await navigator.clipboard.write([clipboardItem]);
+    const textOutput = await navigator.clipboard.readText();
+
+    assert_equals(textOutput, textInput);
+  }, 'Verify write and read clipboard given text: ' + textInput);
+}
+
+readWriteTest('Clipboard write ([text/plain ClipboardItem) -> read text test');
+readWriteTest('non-Latin1 text encoding test データ');
+</script>
+<p>
+  Note: This is a manual test because it writes/reads to the shared system
+  clipboard and thus cannot be run async with other tests that might interact
+  with the clipboard.
+</p>