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+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>textarea, ValidityState.tooShort and user editing</title>
+    <link rel="author" title="Chris Rebert" href="http://chrisrebert.com">
+    <link rel="help" href="https://html.spec.whatwg.org/multipage/#setting-minimum-input-length-requirements:-the-minlength-attribute">
+    <meta name="flags" content="interact">
+    <meta name="assert" content="Per the 'Constraint validation' definition in the referenced section, a textarea whose value was edited by the user but still falls below the textarea's minlength should suffer from being too short.">
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+  </head>
+  <body>
+    <p>Type one additional character into the following text area:</p>
+    <textarea minlength="15" autocomplete="off" id="testinput">123456789</textarea>
+
+    <div id="log"></div>
+    <script>
+var input = document.getElementById('testinput');
+setup({explicit_timeout: true, explicit_done: true});
+on_event(input, "input", function () {
+  test(function() {
+    assert_class_string(input.validity, 'ValidityState', 'HTMLTextAreaElement.validity must be a ValidityState instance');
+    assert_true(input.validity.tooShort, "tooShort must be true since the user just changed the input's value and the value falls below the minlength");
+  });
+  done();
+});
+    </script>
+  </body>
+</html>