--- a/browser/base/content/test/general/browser_bug749738.js
+++ b/browser/base/content/test/general/browser_bug749738.js
@@ -7,29 +7,23 @@
 const DUMMY_PAGE = "http://example.org/browser/browser/base/content/test/general/dummy_page.html";
 
 function test() {
   waitForExplicitFinish();
 
   let tab = gBrowser.addTab();
   gBrowser.selectedTab = tab;
 
-  load(tab, DUMMY_PAGE, function() {
+  BrowserTestUtils.loadURI(tab.linkedBrowser, DUMMY_PAGE);
+  BrowserTestUtils.browserLoaded(tab.linkedBrowser).then(() => {
     gFindBar.onFindCommand();
     EventUtils.sendString("Dummy");
     gBrowser.removeTab(tab);
 
     try {
       gFindBar.close();
       ok(true, "findbar.close should not throw an exception");
     } catch (e) {
       ok(false, "findbar.close threw exception: " + e);
     }
     finish();
   });
 }
-
-function load(aTab, aUrl, aCallback) {
-  aTab.linkedBrowser.addEventListener("load", function(aEvent) {
-    waitForFocus(aCallback, content);
-  }, {capture: true, once: true});
-  aTab.linkedBrowser.loadURI(aUrl);
-}