diff --git a/config/knip.ts b/config/knip.ts
index 8971f7f..017f2db 100644
--- a/config/knip.ts
+++ b/config/knip.ts
@@ -32,7 +32,10 @@ const config: KnipConfig = {
     "unit-testing/*": { entry, project },
     "unit-testing/angular": { entry: ["components/*.ts", "setup.ts"], project },
     "unit-testing/react": { entry: ["components/*.tsx", "setup.ts"], project },
-    "unit-testing/vue": { entry: ["components/*.ts", "setup.ts"], project },
+    "unit-testing/vue": {
+      entry: ["components/*.ts", "jsdom-environment.ts", "setup.ts"],
+      project,
+    },
   },
 };
 
diff --git a/unit-testing/vue/jsdom-environment.ts b/unit-testing/vue/jsdom-environment.ts
index 3a7a9a5..5e94e7b 100644
--- a/unit-testing/vue/jsdom-environment.ts
+++ b/unit-testing/vue/jsdom-environment.ts
@@ -11,7 +11,7 @@ import type {
 
 import JSDOMEnvironment from "jest-environment-jsdom";
 
-export class MyJSDOMEnvironment extends JSDOMEnvironment.default {
+class MyJSDOMEnvironment extends JSDOMEnvironment.default {
   constructor(config: JestEnvironmentConfig, context: EnvironmentContext) {
     super(config, context);
 
diff --git a/unit-testing/vue/package.json b/unit-testing/vue/package.json
index 6cdd774..242fc82 100644
--- a/unit-testing/vue/package.json
+++ b/unit-testing/vue/package.json
@@ -31,6 +31,7 @@
     "vue-template-compiler": "^2.6.12"
   },
   "devDependencies": {
+    "@jest/environment": "^29.7.0",
     "@siteimprove/alfa-future": "^0.81.0",
     "@siteimprove/alfa-jest": "^0.65.2",
     "@siteimprove/alfa-rules": "^0.81.0",
diff --git a/yarn.lock b/yarn.lock
index 653feb9..3e4b54d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -769,6 +769,18 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@jest/environment@npm:^29.7.0":
+  version: 29.7.0
+  resolution: "@jest/environment@npm:29.7.0"
+  dependencies:
+    "@jest/fake-timers": ^29.7.0
+    "@jest/types": ^29.6.3
+    "@types/node": "*"
+    jest-mock: ^29.7.0
+  checksum: 6fb398143b2543d4b9b8d1c6dbce83fa5247f84f550330604be744e24c2bd2178bb893657d62d1b97cf2f24baf85c450223f8237cccb71192c36a38ea2272934
+  languageName: node
+  linkType: hard
+
 "@jest/expect-utils@npm:^29.5.0":
   version: 29.5.0
   resolution: "@jest/expect-utils@npm:29.5.0"
@@ -802,6 +814,20 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@jest/fake-timers@npm:^29.7.0":
+  version: 29.7.0
+  resolution: "@jest/fake-timers@npm:29.7.0"
+  dependencies:
+    "@jest/types": ^29.6.3
+    "@sinonjs/fake-timers": ^10.0.2
+    "@types/node": "*"
+    jest-message-util: ^29.7.0
+    jest-mock: ^29.7.0
+    jest-util: ^29.7.0
+  checksum: caf2bbd11f71c9241b458d1b5a66cbe95debc5a15d96442444b5d5c7ba774f523c76627c6931cca5e10e76f0d08761f6f1f01a608898f4751a0eee54fc3d8d00
+  languageName: node
+  linkType: hard
+
 "@jest/globals@npm:^29.5.0":
   version: 29.5.0
   resolution: "@jest/globals@npm:29.5.0"
@@ -860,6 +886,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@jest/schemas@npm:^29.6.3":
+  version: 29.6.3
+  resolution: "@jest/schemas@npm:29.6.3"
+  dependencies:
+    "@sinclair/typebox": ^0.27.8
+  checksum: 910040425f0fc93cd13e68c750b7885590b8839066dfa0cd78e7def07bbb708ad869381f725945d66f2284de5663bbecf63e8fdd856e2ae6e261ba30b1687e93
+  languageName: node
+  linkType: hard
+
 "@jest/source-map@npm:^29.4.3":
   version: 29.4.3
   resolution: "@jest/source-map@npm:29.4.3"
@@ -945,6 +980,20 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@jest/types@npm:^29.6.3":
+  version: 29.6.3
+  resolution: "@jest/types@npm:29.6.3"
+  dependencies:
+    "@jest/schemas": ^29.6.3
+    "@types/istanbul-lib-coverage": ^2.0.0
+    "@types/istanbul-reports": ^3.0.0
+    "@types/node": "*"
+    "@types/yargs": ^17.0.8
+    chalk: ^4.0.0
+  checksum: a0bcf15dbb0eca6bdd8ce61a3fb055349d40268622a7670a3b2eb3c3dbafe9eb26af59938366d520b86907b9505b0f9b29b85cec11579a9e580694b87cd90fcc
+  languageName: node
+  linkType: hard
+
 "@jridgewell/gen-mapping@npm:^0.3.0, @jridgewell/gen-mapping@npm:^0.3.2":
   version: 0.3.3
   resolution: "@jridgewell/gen-mapping@npm:0.3.3"
@@ -1061,6 +1110,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@sinclair/typebox@npm:^0.27.8":
+  version: 0.27.8
+  resolution: "@sinclair/typebox@npm:0.27.8"
+  checksum: 00bd7362a3439021aa1ea51b0e0d0a0e8ca1351a3d54c606b115fdcc49b51b16db6e5f43b4fe7a28c38688523e22a94d49dd31168868b655f0d4d50f032d07a1
+  languageName: node
+  linkType: hard
+
 "@sindresorhus/is@npm:^4.0.0":
   version: 4.0.0
   resolution: "@sindresorhus/is@npm:4.0.0"
@@ -7530,6 +7586,23 @@ __metadata:
   languageName: node
   linkType: hard
 
+"jest-message-util@npm:^29.7.0":
+  version: 29.7.0
+  resolution: "jest-message-util@npm:29.7.0"
+  dependencies:
+    "@babel/code-frame": ^7.12.13
+    "@jest/types": ^29.6.3
+    "@types/stack-utils": ^2.0.0
+    chalk: ^4.0.0
+    graceful-fs: ^4.2.9
+    micromatch: ^4.0.4
+    pretty-format: ^29.7.0
+    slash: ^3.0.0
+    stack-utils: ^2.0.3
+  checksum: a9d025b1c6726a2ff17d54cc694de088b0489456c69106be6b615db7a51b7beb66788bea7a59991a019d924fbf20f67d085a445aedb9a4d6760363f4d7d09930
+  languageName: node
+  linkType: hard
+
 "jest-mock@npm:^29.5.0":
   version: 29.5.0
   resolution: "jest-mock@npm:29.5.0"
@@ -7541,6 +7614,17 @@ __metadata:
   languageName: node
   linkType: hard
 
+"jest-mock@npm:^29.7.0":
+  version: 29.7.0
+  resolution: "jest-mock@npm:29.7.0"
+  dependencies:
+    "@jest/types": ^29.6.3
+    "@types/node": "*"
+    jest-util: ^29.7.0
+  checksum: 81ba9b68689a60be1482212878973700347cb72833c5e5af09895882b9eb5c4e02843a1bbdf23f94c52d42708bab53a30c45a3482952c9eec173d1eaac5b86c5
+  languageName: node
+  linkType: hard
+
 "jest-pnp-resolver@npm:^1.2.2":
   version: 1.2.2
   resolution: "jest-pnp-resolver@npm:1.2.2"
@@ -7723,6 +7807,20 @@ __metadata:
   languageName: node
   linkType: hard
 
+"jest-util@npm:^29.7.0":
+  version: 29.7.0
+  resolution: "jest-util@npm:29.7.0"
+  dependencies:
+    "@jest/types": ^29.6.3
+    "@types/node": "*"
+    chalk: ^4.0.0
+    ci-info: ^3.2.0
+    graceful-fs: ^4.2.9
+    picomatch: ^2.2.3
+  checksum: 042ab4980f4ccd4d50226e01e5c7376a8556b472442ca6091a8f102488c0f22e6e8b89ea874111d2328a2080083bf3225c86f3788c52af0bd0345a00eb57a3ca
+  languageName: node
+  linkType: hard
+
 "jest-validate@npm:^29.5.0":
   version: 29.5.0
   resolution: "jest-validate@npm:29.5.0"
@@ -9415,6 +9513,17 @@ __metadata:
   languageName: node
   linkType: hard
 
+"pretty-format@npm:^29.7.0":
+  version: 29.7.0
+  resolution: "pretty-format@npm:29.7.0"
+  dependencies:
+    "@jest/schemas": ^29.6.3
+    ansi-styles: ^5.0.0
+    react-is: ^18.0.0
+  checksum: 032c1602383e71e9c0c02a01bbd25d6759d60e9c7cf21937dde8357aa753da348fcec5def5d1002c9678a8524d5fe099ad98861286550ef44de8808cc61e43b6
+  languageName: node
+  linkType: hard
+
 "pretty-ms@npm:^7.0.0":
   version: 7.0.1
   resolution: "pretty-ms@npm:7.0.1"
@@ -11139,6 +11248,7 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "unit-testing-vue@workspace:unit-testing/vue"
   dependencies:
+    "@jest/environment": ^29.7.0
     "@siteimprove/alfa-future": ^0.81.0
     "@siteimprove/alfa-jest": ^0.65.2
     "@siteimprove/alfa-rules": ^0.81.0