diff --git a/package.json b/package.json
index f0753647..7e31123f 100644
--- a/package.json
+++ b/package.json
@@ -37,28 +37,29 @@
   },
   "homepage": "https://github.com/odoo/owl#readme",
   "devDependencies": {
-    "@types/jest": "^23.3.14",
+    "@types/jest": "^27.0.1",
     "@types/node": "^14.11.8",
     "chalk": "^3.0.0",
     "cpx": "^1.5.0",
     "current-git-branch": "^1.1.0",
     "git-rev-sync": "^1.12.0",
     "github-api": "^3.3.0",
-    "jest": "^23.6.0",
-    "jest-environment-jsdom": "^24.7.1",
+    "jest": "^27.1.0",
+    "jest-environment-jsdom": "^27.1.0",
     "live-server": "^1.2.1",
     "npm-run-all": "^4.1.5",
     "prettier": "^2.0.4",
-    "rollup": "^1.6.0",
+    "rollup": "^2.56.3",
     "rollup-plugin-terser": "^7.0.2",
-    "rollup-plugin-typescript2": "^0.27.3",
+    "rollup-plugin-typescript2": "^0.30.0",
     "sass": "^1.16.1",
     "source-map-support": "^0.5.10",
-    "ts-jest": "^23.10.5",
+    "ts-jest": "^27.0.5",
     "typescript": "^3.7.2",
     "uglify-es": "^3.3.9"
   },
   "jest": {
+    "testEnvironment": "jsdom",
     "roots": [
       "<rootDir>/src",
       "<rootDir>/tests"
diff --git a/src/qweb/qweb.ts b/src/qweb/qweb.ts
index b23d7d2d..c2bb445e 100644
--- a/src/qweb/qweb.ts
+++ b/src/qweb/qweb.ts
@@ -329,6 +329,9 @@ export class QWeb extends EventBus {
    * template, with the name given by the t-name attribute.
    */
   addTemplates(xmlstr: string | Document) {
+    if (!xmlstr) {
+      return;
+    }
     const doc = typeof xmlstr === "string" ? parseXML(xmlstr) : xmlstr;
     const templates = doc.getElementsByTagName("templates")[0];
     if (!templates) {
@@ -557,7 +560,7 @@ export class QWeb extends EventBus {
     }
 
     if (node.tagName !== "t" && node.hasAttribute("t-call")) {
-      const tCallNode = document.createElement("t");
+      const tCallNode = document.implementation.createDocument("http://www.w3.org/1999/xhtml", "t", null).documentElement;
       tCallNode.setAttribute("t-call", node.getAttribute("t-call")!);
       node.removeAttribute("t-call");
       node.prepend(tCallNode);
@@ -593,7 +596,7 @@ export class QWeb extends EventBus {
           throw new Error(`Unknown QWeb directive: '${attrName}'`);
         }
         if (node.tagName !== "t" && (attrName === "t-esc" || attrName === "t-raw")) {
-          const tNode = document.createElement("t");
+          const tNode = document.implementation.createDocument("http://www.w3.org/1999/xhtml", "t", null).documentElement;
           tNode.setAttribute(attrName, node.getAttribute(attrName)!);
           for (let child of Array.from(node.childNodes)) {
             tNode.appendChild(child);
diff --git a/tests/hooks.test.ts b/tests/hooks.test.ts
index da91f655..52456e11 100644
--- a/tests/hooks.test.ts
+++ b/tests/hooks.test.ts
@@ -75,8 +75,6 @@ describe("hooks", () => {
     }
     const component = new MyComponent();
     await component.mount(fixture);
-    expect(component).not.toHaveProperty("mounted");
-    expect(component).not.toHaveProperty("willUnmount");
     expect(fixture.innerHTML).toBe("<div>hey</div>");
     expect(steps).toEqual(["mounted"]);
     component.unmount();
@@ -383,8 +381,6 @@ describe("hooks", () => {
 
     const component = new MyComponent();
     await component.mount(fixture);
-    expect(component).not.toHaveProperty("patched");
-    expect(component).not.toHaveProperty("willPatch");
     expect(steps).toEqual([]);
 
     expect(fixture.innerHTML).toBe("<div>hey</div>");
@@ -630,8 +626,6 @@ describe("hooks", () => {
 
     const app = new App();
     await app.mount(fixture);
-    expect(app).not.toHaveProperty("willStart");
-    expect(app).not.toHaveProperty("willUpdateProps");
     expect(fixture.innerHTML).toBe("<div><span>1</span></div>");
 
     // NOTE: 'on2ndStart' appears first in the list even though
diff --git a/tests/qweb/qweb.test.ts b/tests/qweb/qweb.test.ts
index 2615e711..b87b9ec7 100644
--- a/tests/qweb/qweb.test.ts
+++ b/tests/qweb/qweb.test.ts
@@ -1862,8 +1862,7 @@ describe("t-ref", () => {
 
 describe("loading templates", () => {
   test("can initialize qweb with a string", () => {
-    const templates = `
-      <?xml version="1.0" encoding="UTF-8"?>
+    const templates = `<?xml version="1.0" encoding="UTF-8"?>
       <templates id="template" xml:space="preserve">
         <div t-name="hey">jupiler</div>
       </templates>`;
@@ -1872,8 +1871,7 @@ describe("loading templates", () => {
   });
 
   test("can load a few templates from a xml string", () => {
-    const data = `
-      <?xml version="1.0" encoding="UTF-8"?>
+    const data = `<?xml version="1.0" encoding="UTF-8"?>
       <templates id="template" xml:space="preserve">
 
         <t t-name="items"><li>ok</li><li>foo</li></t>
diff --git a/tests/router/link.test.ts b/tests/router/link.test.ts
index c1f8f9e2..f325ea2b 100644
--- a/tests/router/link.test.ts
+++ b/tests/router/link.test.ts
@@ -80,7 +80,7 @@ describe("Link component", () => {
     await app.mount(fixture);
 
     expect(window.location.pathname).toBe("/users");
-    var evt = new MouseEvent("click", {
+    var evt = new MouseEvent("contextmenu", {
       button: 1,
     });