--- a/toolkit/devtools/server/tests/mochitest/test_inspector-release.html
+++ b/toolkit/devtools/server/tests/mochitest/test_inspector-release.html
@@ -26,17 +26,16 @@ var gClient = null;
 
 function assertOwnership() {
   return assertOwnershipTrees(gWalker);
 }
 
 addTest(function setup() {
   let url = document.getElementById("inspectorContent").href;
   attachURL(url, function(err, client, tab, doc) {
-    gInspectee = doc;
     let {InspectorFront} = devtools.require("devtools/server/actors/inspector");
     let inspector = InspectorFront(client, tab);
     promiseDone(inspector.getWalker().then(walker => {
       ok(walker, "getWalker() should return an actor.");
       gClient = client;
       gWalker = walker;
     }).then(runNextTest));
   });

--- a/toolkit/devtools/server/tests/mochitest/test_styles-applied.html
+++ b/toolkit/devtools/server/tests/mochitest/test_styles-applied.html
@@ -23,17 +23,16 @@ window.onload = function() {
 
 var gWalker = null;
 var gStyles = null;
 var gClient = null;
 
 addTest(function setup() {
   let url = document.getElementById("inspectorContent").href;
   attachURL(url, function(err, client, tab, doc) {
-    gInspectee = doc;
     let {InspectorFront} = devtools.require("devtools/server/actors/inspector");
     let inspector = InspectorFront(client, tab);
     promiseDone(inspector.getWalker().then(walker => {
       ok(walker, "getWalker() should return an actor.");
       gClient = client;
       gWalker = walker;
       return inspector.getPageStyle();
     }).then(styles => {

--- a/toolkit/devtools/server/tests/mochitest/test_styles-svg.html
+++ b/toolkit/devtools/server/tests/mochitest/test_styles-svg.html
@@ -24,17 +24,16 @@ window.onload = function() {
 
 var gWalker = null;
 var gStyles = null;
 var gClient = null;
 
 addTest(function setup() {
   let url = document.getElementById("inspectorContent").href;
   attachURL(url, function(err, client, tab, doc) {
-    gInspectee = doc;
     let {InspectorFront} = devtools.require("devtools/server/actors/inspector");
     let inspector = InspectorFront(client, tab);
     promiseDone(inspector.getWalker().then(walker => {
       ok(walker, "getWalker() should return an actor.");
       gClient = client;
       gWalker = walker;
       return inspector.getPageStyle();
     }).then(styles => {