--- a/devtools/client/webconsole/test/browser_webconsole_hpkp_invalid-headers.js
+++ b/devtools/client/webconsole/test/browser_webconsole_hpkp_invalid-headers.js
@@ -95,17 +95,17 @@ add_task(function* () {
           "by a certificate in the default root certificate store. To " +
           "prevent accidental breakage, the specified header was ignored."
   }, hud);
 });
 
 function* checkForMessage(curTest, hud) {
   hud.jsterm.clearOutput();
 
-  content.location = curTest.url;
+  BrowserTestUtils.loadURI(gBrowser.selectedBrowser, curTest.url);
 
   let results = yield waitForMessages({
     webconsole: hud,
     messages: [
       {
         name: curTest.name,
         text: curTest.text,
         category: CATEGORY_SECURITY,