<!DOCTYPE html>
<script>
    if (window.testRunner) {
        testRunner.dumpAsText();
        testRunner.dumpChildFrames();
    }
    if (window.internals)
        internals.settings.setLogDnsPrefetchAndPreconnect(true);
</script>
<link rel="preconnect" href="//prefetch1.wut.com.test">
This test verifies that a preconnect is sent for schemeless host names.