diff --git a/ai/translator/translator_translate.tentative.window.js b/ai/translator/translator_translate.tentative.window.js
new file mode 100644
index 00000000000000..cfa6654e8ce597
--- /dev/null
+++ b/ai/translator/translator_translate.tentative.window.js
@@ -0,0 +1,15 @@
+// META: title=Translate from English to Japanese
+// META: timeout=long
+//
+// Setting `timeout=long` as this test may require downloading the translation
+// library and the language models.
+
+'use strict';
+
+promise_test(async t => {
+  const translator = await translation.createTranslator({
+    sourceLanguage: 'en',
+    targetLanguage: 'ja',
+  });
+  assert_equals(await translator.translate('hello'), 'こんにちは');
+});