--- a/devtools/client/webconsole/test/browser_webconsole_console_trace_duplicates.js
+++ b/devtools/client/webconsole/test/browser_webconsole_console_trace_duplicates.js
@@ -10,17 +10,17 @@ function test() {
                    "test/test-bug_939783_console_trace_duplicates.html";
 
   Task.spawn(runner).then(finishTest);
 
   function* runner() {
     const {tab} = yield loadTab("data:text/html;charset=utf8,<p>hello");
     const hud = yield openConsole(tab);
 
-    content.location = TEST_URI;
+    BrowserTestUtils.loadURI(gBrowser.selectedBrowser, TEST_URI);
 
     // NB: Now that stack frames include a column number multiple invocations
     //     on the same line are considered unique. ie:
     //       |foo(); foo();|
     //     will generate two distinct trace entries.
     yield waitForMessages({
       webconsole: hud,
       messages: [{