1 files changed, 23 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/syntax/serializing-html-fragments/template.html b/testing/web-platform/tests/html/syntax/serializing-html-fragments/template.html
new file mode 100644
index 0000000000..ea050384f2
--- /dev/null
+++ b/testing/web-platform/tests/html/syntax/serializing-html-fragments/template.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<body>
+<script>
+test(() => {
+  document.body.insertAdjacentHTML('afterbegin', '<div><template><table><td></table></template></div>');
+  let t = document.querySelector('template');
+  assert_equals(t.innerHTML, '<table><tbody><tr><td></td></tr></tbody></table>');
+  assert_equals(t.parentNode.innerHTML, '<template><table><tbody><tr><td></td></tr></tbody></table></template>');
+}, 'Template element content is correctly serialized');
+
+test(() => {
+  let t = document.createElement('template');
+  let c = t.content.appendChild(document.createElementNS("xx", "div"));
+  c.setAttributeNS('http://www.w3.org/XML/1998/namespace', 'xml:lang', 'en-us');
+  c.setAttributeNS('uri2', 'p:attr', 'v');
+  let doc = new Document();
+  doc.adoptNode(t.content);
+  assert_equals(t.innerHTML, '<div xml:lang="en-us" p:attr="v"></div>');
+}, 'HTML fragment serialization algorithm should be applied to the template content');
+</script>
+</body>