diff --git a/app/assets/javascripts/discourse/app/lib/admin-plugin-header-actions.js b/app/assets/javascripts/discourse/app/lib/admin-plugin-header-actions.js
index af3a5c91f8a..27cb2a227c7 100644
--- a/app/assets/javascripts/discourse/app/lib/admin-plugin-header-actions.js
+++ b/app/assets/javascripts/discourse/app/lib/admin-plugin-header-actions.js
@@ -1,13 +1,13 @@
-let pluginHeaderActionComponents = [];
+let pluginHeaderActionComponents = new Map();
 
-export function registerPluginHeaderActionComponent(pluginId, componentKlass) {
-  pluginHeaderActionComponents[pluginId] = componentKlass;
+export function registerPluginHeaderActionComponent(pluginId, componentClass) {
+  pluginHeaderActionComponents.set(pluginId, componentClass);
 }
 
 export function clearPluginHeaderActionComponents() {
-  pluginHeaderActionComponents = {};
+  pluginHeaderActionComponents = new Map();
 }
 
 export function headerActionComponentForPlugin(pluginId) {
-  return pluginHeaderActionComponents[pluginId];
+  return pluginHeaderActionComponents.get(pluginId);
 }
diff --git a/app/assets/javascripts/discourse/app/lib/plugin-api.gjs b/app/assets/javascripts/discourse/app/lib/plugin-api.gjs
index bb86293789a..fb68689f98a 100644
--- a/app/assets/javascripts/discourse/app/lib/plugin-api.gjs
+++ b/app/assets/javascripts/discourse/app/lib/plugin-api.gjs
@@ -3265,10 +3265,10 @@ class PluginApi {
    * for that plugin -- one example is "Create export" for chat.
    *
    * @param {string} pluginId - The `dasherizedName` of the plugin using this component.
-   * @param {Class} componentKlass - The JS class of the component to render.
+   * @param {Class} componentClass - The JS class of the component to render.
    */
-  registerPluginHeaderActionComponent(pluginId, componentKlass) {
-    registerPluginHeaderActionComponent(pluginId, componentKlass);
+  registerPluginHeaderActionComponent(pluginId, componentClass) {
+    registerPluginHeaderActionComponent(pluginId, componentClass);
   }
 
   // eslint-disable-next-line no-unused-vars
diff --git a/app/assets/javascripts/discourse/tests/integration/components/admin-page-header-test.gjs b/app/assets/javascripts/discourse/tests/integration/components/admin-page-header-test.gjs
index c3847ffb020..5cc3b6c59ad 100644
--- a/app/assets/javascripts/discourse/tests/integration/components/admin-page-header-test.gjs
+++ b/app/assets/javascripts/discourse/tests/integration/components/admin-page-header-test.gjs
@@ -202,7 +202,7 @@ module("Integration | Component | AdminPageHeader", function (hooks) {
 });
 
 module("Integration | Component | AdminPageHeader | Mobile", function (hooks) {
-  hooks.beforeEach(() => {
+  hooks.beforeEach(function () {
     forceMobile();
   });
 
diff --git a/app/assets/javascripts/discourse/tests/integration/components/admin-page-subheader-test.gjs b/app/assets/javascripts/discourse/tests/integration/components/admin-page-subheader-test.gjs
index 74a3b30f308..217ef7ca2cc 100644
--- a/app/assets/javascripts/discourse/tests/integration/components/admin-page-subheader-test.gjs
+++ b/app/assets/javascripts/discourse/tests/integration/components/admin-page-subheader-test.gjs
@@ -132,7 +132,7 @@ module("Integration | Component | AdminPageSubheader", function (hooks) {
 module(
   "Integration | Component | AdminPageSubheader | Mobile",
   function (hooks) {
-    hooks.beforeEach(() => {
+    hooks.beforeEach(function () {
       forceMobile();
     });