diff --git a/front_end/Tests.js b/front_end/Tests.js
index 8eae23c8c7..c46c64e8fe 100644
--- a/front_end/Tests.js
+++ b/front_end/Tests.js
@@ -43,6 +43,8 @@
   let Common;
   /** @type {import('./core/host/host.js')} */
   let HostModule;
+  /** @type {import('./core/root/root.js')} */
+  let Root;
   /** @type {import('./core/sdk/sdk.js')} */
   let SDK;
   /** @type {import('./panels/sources/sources.js')} */
@@ -163,6 +165,7 @@
       ([
         Common,
         HostModule,
+        Root,
         SDK,
         Sources,
         Timeline,
@@ -172,6 +175,7 @@
            await Promise.all([
              self.runtime.loadLegacyModule('core/common/common.js'),
              self.runtime.loadLegacyModule('core/host/host.js'),
+             self.runtime.loadLegacyModule('core/root/root.js'),
              self.runtime.loadLegacyModule('core/sdk/sdk.js'),
              self.runtime.loadLegacyModule('panels/sources/sources.js'),
              self.runtime.loadLegacyModule('panels/timeline/timeline.js'),
diff --git a/front_end/legacy_test_runner/test_runner/test_runner.js b/front_end/legacy_test_runner/test_runner/test_runner.js
index bc8e26d028..4c550bd068 100644
--- a/front_end/legacy_test_runner/test_runner/test_runner.js
+++ b/front_end/legacy_test_runner/test_runner/test_runner.js
@@ -4,6 +4,8 @@
 
 // @ts-nocheck This file is not checked by TypeScript as it has a lot of legacy code.
 import * as Platform from '../../core/platform/platform.js';
+import * as Root from '../../core/root/root.js';
+
 import * as TestRunner from './TestRunner.js';
 
 self.Platform = self.Platform || {};
@@ -47,7 +49,7 @@ function _setupTestHelpers(target) {
 }
 
 export async function _executeTestScript() {
-  const testScriptURL = /** @type {string} */ (Root.Runtime.queryParam('test'));
+  const testScriptURL = /** @type {string} */ (Root.Runtime.Runtime.queryParam('test'));
   if (TestRunner.isDebugTest()) {
     /* eslint-disable no-console */
     TestRunner.setInnerResult(console.log);