--- a/dom/cache/test/mochitest/serviceworker_driver.js
+++ b/dom/cache/test/mochitest/serviceworker_driver.js
@@ -1,19 +1,12 @@
 // Any copyright is dedicated to the Public Domain.
 // http://creativecommons.org/publicdomain/zero/1.0/
 
 function serviceWorkerTestExec(testFile) {
-  var isB2G = !navigator.userAgent.includes("Android") &&
-              /Mobile|Tablet/.test(navigator.userAgent);
-  if (isB2G) {
-    // TODO B2G doesn't support running service workers for now due to bug 1137683.
-    dump("Skipping running the test in SW until bug 1137683 gets fixed.\n");
-    return Promise.resolve();
-  }
   return new Promise(function(resolve, reject) {
     function setupSW(registration) {
       var worker = registration.waiting ||
                    registration.active;
 
       window.addEventListener("message",function onMessage(event) {
         if (event.data.context != "ServiceWorker") {
           return;