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diff --git a/dom/media/webrtc/tests/mochitests/test_peerConnection_basicAudioNoisyUDPBlock.html b/dom/media/webrtc/tests/mochitests/test_peerConnection_basicAudioNoisyUDPBlock.html
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index 0000000000..297121cd94
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+++ b/dom/media/webrtc/tests/mochitests/test_peerConnection_basicAudioNoisyUDPBlock.html
@@ -0,0 +1,41 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <script type="application/javascript" src="pc.js"></script>
+</head>
+<body>
+<pre id="test">
+<script type="application/javascript">
+createHTML({
+  bug: "1231975",
+  title: "Basic audio-only peer connection where UDP sockets return errors on send"
+});
+
+// This test uses the NAT simulator, which doesn't work in https, so we turn
+// on getUserMedia in http, which requires a reload.
+if (!("mediaDevices" in navigator)) {
+  SpecialPowers.pushPrefEnv({set: [['media.devices.insecure.enabled', true]]},
+                            () => location.reload());
+} else {
+  runNetworkTest(async (options = {}) => {
+    await pushPrefs(
+        ['media.peerconnection.ice.obfuscate_host_addresses', false],
+        ['media.peerconnection.nat_simulator.filtering_type', 'PORT_DEPENDENT'],
+        ['media.peerconnection.nat_simulator.mapping_type', 'PORT_DEPENDENT'],
+        ['media.peerconnection.nat_simulator.block_udp', true],
+        ['media.peerconnection.nat_simulator.error_code_for_drop', 3 /*R_INTERNAL*/],
+        ['media.peerconnection.nat_simulator.block_tls', true],
+        ['media.getusermedia.insecure.enabled', true]);
+    options.expectedLocalCandidateType = "relay-tcp";
+    options.expectedRemoteCandidateType = "relay-tcp";
+    // No reason to wait for gathering to complete like the other NAT tests,
+    // since relayed-tcp is the only thing that can work.
+    const test = new PeerConnectionTest(options);
+    test.setMediaConstraints([{audio: true}], [{audio: true}]);
+    await test.run();
+  }, { useIceServer: true });
+}
+</script>
+</pre>
+</body>
+</html>