diff --git a/package.json b/package.json
index d8c6dc32..9910fa5c 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
     "minimist": "^1.2.6",
     "prettier": "^3.7.4",
     "typescript": "^5.9.3",
-    "vitest": "^4.0.15"
+    "vitest": "^4.0.16"
   },
   "packageManager": "yarn@4.12.0"
 }
diff --git a/packages/alfa-vitest/package.json b/packages/alfa-vitest/package.json
index b224c04d..6a02e2bd 100644
--- a/packages/alfa-vitest/package.json
+++ b/packages/alfa-vitest/package.json
@@ -30,7 +30,7 @@
     "@siteimprove/alfa-future": "^0.108.2",
     "@siteimprove/alfa-hash": "^0.108.2",
     "@siteimprove/alfa-mapper": "^0.108.2",
-    "vitest": "^4.0.15"
+    "vitest": "^4.0.16"
   },
   "peerDependencies": {
     "@siteimprove/alfa-act": "^0.108.2",
diff --git a/yarn.lock b/yarn.lock
index ada5ccd1..2f617aaf 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2879,7 +2879,7 @@ __metadata:
     minimist: "npm:^1.2.6"
     prettier: "npm:^3.7.4"
     typescript: "npm:^5.9.3"
-    vitest: "npm:^4.0.15"
+    vitest: "npm:^4.0.16"
   languageName: unknown
   linkType: soft
 
@@ -3874,7 +3874,7 @@ __metadata:
     "@siteimprove/alfa-mapper": "npm:^0.108.2"
     "@siteimprove/alfa-rules": "npm:^0.108.2"
     "@siteimprove/alfa-web": "npm:^0.108.2"
-    vitest: "npm:^4.0.15"
+    vitest: "npm:^4.0.16"
   peerDependencies:
     "@siteimprove/alfa-act": ^0.108.2
     "@siteimprove/alfa-future": ^0.108.2
@@ -4525,25 +4525,25 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@vitest/expect@npm:4.0.15":
-  version: 4.0.15
-  resolution: "@vitest/expect@npm:4.0.15"
+"@vitest/expect@npm:4.0.16":
+  version: 4.0.16
+  resolution: "@vitest/expect@npm:4.0.16"
   dependencies:
     "@standard-schema/spec": "npm:^1.0.0"
     "@types/chai": "npm:^5.2.2"
-    "@vitest/spy": "npm:4.0.15"
-    "@vitest/utils": "npm:4.0.15"
+    "@vitest/spy": "npm:4.0.16"
+    "@vitest/utils": "npm:4.0.16"
     chai: "npm:^6.2.1"
     tinyrainbow: "npm:^3.0.3"
-  checksum: 10/cfb1822012a7ba66d46224c94d2951a780668729199a81eed918103d74110333bd1296e8f598cf2345bac0998f01a71803146da97c8bb69d2775abf3918f02c9
+  checksum: 10/1da98c86d394a4955bef381ac2c63a52d2eec0086f55e18858083da928cfdf51e7a30bfd88b1814e861906dae44d089aeab0fcc67b2597a4a8073c70cd14bdf7
   languageName: node
   linkType: hard
 
-"@vitest/mocker@npm:4.0.15":
-  version: 4.0.15
-  resolution: "@vitest/mocker@npm:4.0.15"
+"@vitest/mocker@npm:4.0.16":
+  version: 4.0.16
+  resolution: "@vitest/mocker@npm:4.0.16"
   dependencies:
-    "@vitest/spy": "npm:4.0.15"
+    "@vitest/spy": "npm:4.0.16"
     estree-walker: "npm:^3.0.3"
     magic-string: "npm:^0.30.21"
   peerDependencies:
@@ -4554,54 +4554,54 @@ __metadata:
       optional: true
     vite:
       optional: true
-  checksum: 10/9f2aed963bd1bbe13f8acb5d05a95e3cf09d50e57708fb9e88cb4f18b0c0c9c854290bdffd8900914b64796ebdec4c068634487ec2fe55e7984941fff404601a
+  checksum: 10/3a34c6571ef278b80d33feabb8389d6cf7cfd248fe592b8b2a373650ab460b95805fde65e6bd76aebc75729fc0c94b4d8b9bba25fa55e21c2745ae03c10316bf
   languageName: node
   linkType: hard
 
-"@vitest/pretty-format@npm:4.0.15":
-  version: 4.0.15
-  resolution: "@vitest/pretty-format@npm:4.0.15"
+"@vitest/pretty-format@npm:4.0.16":
+  version: 4.0.16
+  resolution: "@vitest/pretty-format@npm:4.0.16"
   dependencies:
     tinyrainbow: "npm:^3.0.3"
-  checksum: 10/c8ef240027ac340ae420a9b3eb77683a6399edd066832e27793eae19c189e567c5a225c1f26848aa2a2b7545dcc0c9019d6ff0a643cbf0eae004a05117fc2b05
+  checksum: 10/914d5d35fb3b0aa67f8e6065ac3d1f1798b7774e1ad9d1e873e7c6efdc7925c98e0f8188bb13c4f3feb4d80b756c337f7a55cd4f78c50fe786330d0aaede7cfd
   languageName: node
   linkType: hard
 
-"@vitest/runner@npm:4.0.15":
-  version: 4.0.15
-  resolution: "@vitest/runner@npm:4.0.15"
+"@vitest/runner@npm:4.0.16":
+  version: 4.0.16
+  resolution: "@vitest/runner@npm:4.0.16"
   dependencies:
-    "@vitest/utils": "npm:4.0.15"
+    "@vitest/utils": "npm:4.0.16"
     pathe: "npm:^2.0.3"
-  checksum: 10/682c070d00d0505bc4568e807a746238fe726290bcaea2695a009016ce2c396f8a3c090e5ed12795c1b65bcab4188d2fd8c513ce8324abf978272f319e445d19
+  checksum: 10/2aed39bb46ba747bd4fd5acf081e9e500192fec19c1887399f6a1701bbfdab05f3d3b45c00e4af5b90a0832853c959a0f64e676b05c67f5457b7c6984f844aa2
   languageName: node
   linkType: hard
 
-"@vitest/snapshot@npm:4.0.15":
-  version: 4.0.15
-  resolution: "@vitest/snapshot@npm:4.0.15"
+"@vitest/snapshot@npm:4.0.16":
+  version: 4.0.16
+  resolution: "@vitest/snapshot@npm:4.0.16"
   dependencies:
-    "@vitest/pretty-format": "npm:4.0.15"
+    "@vitest/pretty-format": "npm:4.0.16"
     magic-string: "npm:^0.30.21"
     pathe: "npm:^2.0.3"
-  checksum: 10/f881257fc1c520541131296f9762d627ad61eb167a3d7129942a5c2dce46e870af1a8446fbf94d2fcdc5a31ab787ffff113f2b8dbd75b15d0494fe43db649682
+  checksum: 10/30f2977c96645c018b9d1f658e758f4f886ac63966dca909e9f736d6c9d6d0a6dabdeaedf9abcc13e1000458e4069283632c0140033972847dc1f4b4ac38e076
   languageName: node
   linkType: hard
 
-"@vitest/spy@npm:4.0.15":
-  version: 4.0.15
-  resolution: "@vitest/spy@npm:4.0.15"
-  checksum: 10/700b06beb4fd33c1430bc5061e7c3055df9ad1e64500a0a02edba6a52e37ba3bf800eadfda1f617e1eeca53d7ab6941a69ba2812980347fcc3c3b736c5ae5a56
+"@vitest/spy@npm:4.0.16":
+  version: 4.0.16
+  resolution: "@vitest/spy@npm:4.0.16"
+  checksum: 10/76cbabfdd77adf16904d5c128de67abca650bbc2ed36acc68fca548dc51844c7fc1ac516e384d07341b25ae39318c7c2feb499ffa7283a1a838f762cb0cda6ab
   languageName: node
   linkType: hard
 
-"@vitest/utils@npm:4.0.15":
-  version: 4.0.15
-  resolution: "@vitest/utils@npm:4.0.15"
+"@vitest/utils@npm:4.0.16":
+  version: 4.0.16
+  resolution: "@vitest/utils@npm:4.0.16"
   dependencies:
-    "@vitest/pretty-format": "npm:4.0.15"
+    "@vitest/pretty-format": "npm:4.0.16"
     tinyrainbow: "npm:^3.0.3"
-  checksum: 10/54d3fd272e05ad43913d842a25dce705eb71db8591511f28fa4a6d0c28fd5eb109c580072e9f8dbc0f431425c890b74494c9d0b14f78d0be18ab87071f06d020
+  checksum: 10/07fb3c96867656ff080df7ae6056a8dc23931d0f8bc16e15994c576c580dc6e2dcf71af0964fee197ea7eea4f4ad72c256f56cd3b81599f9e0ba63a228968d50
   languageName: node
   linkType: hard
 
@@ -12068,17 +12068,17 @@ __metadata:
   languageName: node
   linkType: hard
 
-"vitest@npm:^4.0.15":
-  version: 4.0.15
-  resolution: "vitest@npm:4.0.15"
+"vitest@npm:^4.0.15, vitest@npm:^4.0.16":
+  version: 4.0.16
+  resolution: "vitest@npm:4.0.16"
   dependencies:
-    "@vitest/expect": "npm:4.0.15"
-    "@vitest/mocker": "npm:4.0.15"
-    "@vitest/pretty-format": "npm:4.0.15"
-    "@vitest/runner": "npm:4.0.15"
-    "@vitest/snapshot": "npm:4.0.15"
-    "@vitest/spy": "npm:4.0.15"
-    "@vitest/utils": "npm:4.0.15"
+    "@vitest/expect": "npm:4.0.16"
+    "@vitest/mocker": "npm:4.0.16"
+    "@vitest/pretty-format": "npm:4.0.16"
+    "@vitest/runner": "npm:4.0.16"
+    "@vitest/snapshot": "npm:4.0.16"
+    "@vitest/spy": "npm:4.0.16"
+    "@vitest/utils": "npm:4.0.16"
     es-module-lexer: "npm:^1.7.0"
     expect-type: "npm:^1.2.2"
     magic-string: "npm:^0.30.21"
@@ -12096,10 +12096,10 @@ __metadata:
     "@edge-runtime/vm": "*"
     "@opentelemetry/api": ^1.9.0
     "@types/node": ^20.0.0 || ^22.0.0 || >=24.0.0
-    "@vitest/browser-playwright": 4.0.15
-    "@vitest/browser-preview": 4.0.15
-    "@vitest/browser-webdriverio": 4.0.15
-    "@vitest/ui": 4.0.15
+    "@vitest/browser-playwright": 4.0.16
+    "@vitest/browser-preview": 4.0.16
+    "@vitest/browser-webdriverio": 4.0.16
+    "@vitest/ui": 4.0.16
     happy-dom: "*"
     jsdom: "*"
   peerDependenciesMeta:
@@ -12123,7 +12123,7 @@ __metadata:
       optional: true
   bin:
     vitest: vitest.mjs
-  checksum: 10/b6df3d07b3f858ce1efc072d90753bc76d278a29245317b70e7bab0ded8bfaf81fc1e41aa30687365fef6d0e4110727867716440bc745e8948ae217a67f9d77b
+  checksum: 10/22b3806988ab186be4a6a133903a70c62835198e8e749f6ed751957d23bc1e3f0466e310a1a79d0b70a354b2e308e574486191eb39711257b3fe61e4fe00d1c8
   languageName: node
   linkType: hard