--- a/browser/extensions/webcompat-reporter/test/browser/browser_disabled_cleanup.js
+++ b/browser/extensions/webcompat-reporter/test/browser/browser_disabled_cleanup.js
@@ -1,9 +1,8 @@
 // Test the addon is cleaning up after itself when disabled.
 add_task(async function test_disabled() {
   await SpecialPowers.pushPrefEnv({set: [[PREF_WC_REPORTER_ENABLED, false]]});
 
   await BrowserTestUtils.withNewTab({gBrowser, url: "about:blank"}, function() {
-    is(typeof window._webCompatReporterTabListener, "undefined", "TabListener expando does not exist.");
     is(document.getElementById("webcompat-reporter-button"), null, "Report Site Issue button does not exist.");
   });
 });