<!DOCTYPE html>
<html>
<body>
<form>
<input id="testInput" type="text" required>
<input id="testSubmit" type="submit">
</form>
<script>
if (window.testRunner)
    testRunner.waitUntilDone();

document.getElementById("testSubmit").onclick = function() {
    setTimeout(function() {
        window.location = "resources/check-validation-bubble-not-visible.html";
    }, 0);
}

onload = function() {
    document.getElementById("testSubmit").click();
};
</script>
</body>
</html>