diff --git a/dom/security/test/csp/file_main.js b/dom/security/test/csp/file_main.js
index e584c2645c3..0bc15b6827a 100644
--- a/dom/security/test/csp/file_main.js
+++ b/dom/security/test/csp/file_main.js
@@ -11,7 +11,10 @@ doXHR("http://example.com/tests/dom/security/test/csp/file_CSP.sjs?testid=xhr_ba
 fetch("http://mochi.test:8888/tests/dom/security/test/csp/file_CSP.sjs?testid=fetch_good");
 fetch("http://example.com/tests/dom/security/test/csp/file_CSP.sjs?testid=fetch_bad");
 navigator.sendBeacon("http://mochi.test:8888/tests/dom/security/test/csp/file_CSP.sjs?testid=beacon_good");
-navigator.sendBeacon("http://example.com/tests/dom/security/test/csp/file_CSP.sjs?testid=beacon_bad");
+try {
+  navigator.sendBeacon("http://example.com/tests/dom/security/test/csp/file_CSP.sjs?testid=beacon_bad");
+} catch(ex) {}
+
 
 new Worker("file_main_worker.js").postMessage({inherited : false});
 
diff --git a/dom/security/test/csp/file_sendbeacon.html b/dom/security/test/csp/file_sendbeacon.html
deleted file mode 100644
index 13202c65ffa..00000000000
--- a/dom/security/test/csp/file_sendbeacon.html
+++ /dev/null
@@ -1,21 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <meta charset="utf-8">
-  <meta http-equiv="Content-Security-Policy" content= "connect-src 'none'">
-  <title>Bug 1234813 - sendBeacon should not throw if blocked by Content Policy</title>
-</head>
-<body>
-
-<script type="application/javascript">
-try {
-  navigator.sendBeacon("http://example.com/sendbeaconintonirvana");
-  window.parent.postMessage({result: "blocked-beacon-does-not-throw"}, "*");
-  }
-  catch (e) {
-    window.parent.postMessage({result: "blocked-beacon-throws"}, "*");
-  }
-</script>
-
-</body>
-</html>
diff --git a/dom/security/test/csp/mochitest.ini b/dom/security/test/csp/mochitest.ini
index d9ae9d0a1b6..f86bd6a9499 100644
--- a/dom/security/test/csp/mochitest.ini
+++ b/dom/security/test/csp/mochitest.ini
@@ -153,7 +153,6 @@ support-files =
   file_docwrite_meta.css
   file_docwrite_meta.js
   file_multipart_testserver.sjs
-  file_sendbeacon.html
 
 [test_base-uri.html]
 [test_blob_data_schemes.html]
@@ -230,4 +229,3 @@ skip-if = buildapp == 'b2g' #investigate in bug 1222904
 [test_meta_header_dual.html]
 [test_docwrite_meta.html]
 [test_multipartchannel.html]
-[test_sendbeacon.html]
diff --git a/dom/security/test/csp/test_sendbeacon.html b/dom/security/test/csp/test_sendbeacon.html
deleted file mode 100644
index 1b4cfbc867a..00000000000
--- a/dom/security/test/csp/test_sendbeacon.html
+++ /dev/null
@@ -1,34 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <meta charset="utf-8">
-  <title>Bug 1234813 - sendBeacon should not throw if blocked by Content Policy</title>
-  <!-- Including SimpleTest.js so we can use waitForExplicitFinish !-->
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
-</head>
-<body>
-<p id="display"></p>
-<iframe style="width:100%;" id="testframe" src="file_sendbeacon.html"></iframe>
-
-<script class="testbody" type="text/javascript">
-
-/* Description of the test:
- * Let's try to fire a sendBeacon which gets blocked by CSP. Let's make sure
- * sendBeacon does not throw an exception.
- */
-SimpleTest.waitForExplicitFinish();
-
-// a postMessage handler used to bubble up the
-// result from within the iframe.
-window.addEventListener("message", receiveMessage, false);
-function receiveMessage(event) {
-  var result = event.data.result;
-  is(result, "blocked-beacon-does-not-throw", "sendBeacon should not throw");
-  window.removeEventListener("message", receiveMessage, false);
-  SimpleTest.finish();
-}
-
-</script>
-</body>
-</html>
