diff --git a/addons/web/static/tests/helpers/test_env.js b/addons/web/static/tests/helpers/test_env.js
index c0020ff8308..344fb48dda9 100644
--- a/addons/web/static/tests/helpers/test_env.js
+++ b/addons/web/static/tests/helpers/test_env.js
@@ -5,6 +5,8 @@ odoo.define('web.test_env', async function (require) {
     const { buildQuery } = require('web.rpc');
     const session = require('web.session');
 
+    let qweb;
+
     /**
      * Creates a test environment with the given environment object.
      * Any access to a key that has not been explicitly defined in the given environment object
@@ -15,6 +17,11 @@ odoo.define('web.test_env', async function (require) {
      * @returns {Proxy}
      */
     function makeTestEnvironment(env = {}, providedRPC = null) {
+        if (!qweb) {
+            // avoid parsing templates at every test because it takes a lot of
+            // time and they never change
+            qweb = new owl.QWeb({ templates: session.owlTemplates });
+        }
         const database = {
             parameters: {
                 code: "en_US",
@@ -40,7 +47,7 @@ odoo.define('web.test_env', async function (require) {
             bus: env.bus || new Bus(),
             device: Object.assign({ isMobile: false }, env.device),
             isDebug: env.isDebug || (() => false),
-            qweb: new owl.QWeb({ templates: session.owlTemplates }),
+            qweb,
             services: Object.assign({
                 ajax: {
                     rpc() {