--- a/testing/talos/talos/tests/devtools/addon/content/damp.js
+++ b/testing/talos/talos/tests/devtools/addon/content/damp.js
@@ -2,20 +2,30 @@ const { Services } = ChromeUtils.import(
 const { XPCOMUtils } = ChromeUtils.import("resource://gre/modules/XPCOMUtils.jsm", {});
 const env = Cc["@mozilla.org/process/environment;1"].getService(Ci.nsIEnvironment);
 
 XPCOMUtils.defineLazyGetter(this, "require", function() {
   let { require } =
     ChromeUtils.import("resource://devtools/shared/Loader.jsm", {});
   return require;
 });
+
+XPCOMUtils.defineLazyGetter(this, "testRequire", function() {
+  let { DevToolsLoader } =
+    ChromeUtils.import("resource://devtools/shared/Loader.jsm", {});
+  let testLoader = new DevToolsLoader();
+  testLoader.invisibleToDebugger = true;
+  return testLoader.require;
+});
+
 XPCOMUtils.defineLazyGetter(this, "gDevTools", function() {
   let { gDevTools } = require("devtools/client/framework/devtools");
   return gDevTools;
 });
+
 XPCOMUtils.defineLazyGetter(this, "TargetFactory", function() {
   let { TargetFactory } = require("devtools/client/framework/target");
   return TargetFactory;
 });
 
 // Record allocation count in new subtests if DEBUG_DEVTOOLS_ALLOCATIONS is set to
 // "normal". Print allocation sites to stdout if DEBUG_DEVTOOLS_ALLOCATIONS is set to
 // "verbose".
@@ -76,16 +86,19 @@ function awaitBrowserLoaded(browser, inc
 
 /* globals res:true */
 
 function Damp() {
   Services.prefs.setBoolPref("devtools.webconsole.new-frontend-enabled", true);
 }
 
 Damp.prototype = {
+  getDefaultRequire() {
+    return require;
+  },
   async garbageCollect() {
     dump("Garbage collect\n");
 
     // Minimize memory usage
     // mimic miminizeMemoryUsage, by only flushing JS objects via GC.
     // We don't want to flush all the cache like minimizeMemoryUsage,
     // as it slow down next executions almost like a cold start.
 
@@ -206,17 +219,17 @@ Damp.prototype = {
     if (this._nextTestIndex >= this._tests.length) {
       this._onSequenceComplete();
       return;
     }
 
     let test = this._tests[this._nextTestIndex++];
 
     dump("Loading test : " + test + "\n");
-    let testMethod = require("chrome://damp/content/tests/" + test);
+    let testMethod = testRequire("chrome://damp/content/tests/" + test);
 
     dump("Executing test : " + test + "\n");
     testMethod();
   },
   // Each command at the array a function which must call nextCommand once it's done
   _doSequence(tests, onComplete) {
     this._tests = tests;
     this._onSequenceComplete = onComplete;
@@ -279,17 +292,17 @@ Damp.prototype = {
 
   startAllocationTracker() {
     const { allocationTracker } = require("devtools/shared/test-helpers/allocation-tracker");
     return allocationTracker();
   },
 
   startTest(doneCallback, config) {
     dump("Initialize the head file with a reference to this DAMP instance\n");
-    let head = require("chrome://damp/content/tests/head.js");
+    let head = testRequire("chrome://damp/content/tests/head.js");
     head.initialize(this);
 
     this._onTestComplete = function(results) {
       TalosParentProfiler.pause("DAMP - end");
       doneCallback(results);
     };
     this._config = config;
 

--- a/testing/talos/talos/tests/devtools/addon/content/tests/head.js
+++ b/testing/talos/talos/tests/devtools/addon/content/tests/head.js
@@ -6,33 +6,34 @@
 
 /**
  * This helper contains the public API that can be used by DAMP tests.
  */
 
 // eslint-disable-next-line mozilla/no-define-cc-etc
 const { Ci } = require("chrome");
 const Services = require("Services");
-const { gDevTools } = require("devtools/client/framework/devtools");
-const { TargetFactory } = require("devtools/client/framework/target");
+let gDevTools, TargetFactory;
 
 const webserver = Services.prefs.getCharPref("addon.test.damp.webserver");
 
 const PAGES_BASE_URL = webserver + "/tests/devtools/addon/content/pages/";
 
 exports.PAGES_BASE_URL = PAGES_BASE_URL;
 exports.SIMPLE_URL = PAGES_BASE_URL + "simple.html";
 exports.COMPLICATED_URL = webserver + "/tests/tp5n/bild.de/www.bild.de/index.html";
 
 let damp = null;
 /*
  * This method should be called by js before starting the tests.
  */
 exports.initialize = function(_damp) {
   damp = _damp;
+  ({ gDevTools } = damp.getDefaultRequire()("devtools/client/framework/devtools"));
+  ({ TargetFactory } = damp.getDefaultRequire()("devtools/client/framework/target"));
 };
 
 function garbageCollect() {
   return damp.garbageCollect();
 }
 exports.garbageCollect = garbageCollect;
 
 function runTest(label) {