diff --git a/addons/web/static/src/legacy/js/owl_compatibility.js b/addons/web/static/src/legacy/js/owl_compatibility.js
index e1c82cd3468..9afa2b49685 100644
--- a/addons/web/static/src/legacy/js/owl_compatibility.js
+++ b/addons/web/static/src/legacy/js/owl_compatibility.js
@@ -343,6 +343,7 @@ odoo.define('web.OwlCompatibility', function () {
          */
         destroy() {
             for (const component of children.get(this) || []) {
+                component.env.qweb.off("update", component);
                 component.__destroy();
             }
             children.delete(this);
diff --git a/addons/web/static/tests/legacy/helpers/test_env.js b/addons/web/static/tests/legacy/helpers/test_env.js
index ff6c0bf6b29..e335d59616a 100644
--- a/addons/web/static/tests/legacy/helpers/test_env.js
+++ b/addons/web/static/tests/legacy/helpers/test_env.js
@@ -4,6 +4,7 @@ odoo.define('web.test_env', async function (require) {
     const Bus = require('web.Bus');
     const { buildQuery } = require('web.rpc');
     const session = require('web.session');
+    const { registerCleanup } = require("@web/../tests/helpers/cleanup");
 
     let qweb;
 
@@ -22,6 +23,9 @@ odoo.define('web.test_env', async function (require) {
             // time and they never change
             qweb = new owl.QWeb({ templates: session.owlTemplates });
         }
+        registerCleanup(() => {
+            qweb.subscriptions = {};
+        });
 
         const defaultTranslationParamters = {
             code: "en_US",