diff --git a/packages/qunit-dom/package.json b/packages/qunit-dom/package.json
index 6ad7592a2..bd10cc954 100644
--- a/packages/qunit-dom/package.json
+++ b/packages/qunit-dom/package.json
@@ -54,7 +54,7 @@
     "loader.js": "4.7.0",
     "prettier": "3.0.3",
     "publint": "0.2.4",
-    "qunit": "2.20.1",
+    "qunit": "2.21.0",
     "release-it": "16.2.1",
     "@release-it-plugins/lerna-changelog": "6.1.0",
     "rollup": "2.79.1",
diff --git a/packages/test-app/package.json b/packages/test-app/package.json
index 267b8eaa4..22964b284 100644
--- a/packages/test-app/package.json
+++ b/packages/test-app/package.json
@@ -98,7 +98,7 @@
     "lerna-changelog": "2.2.0",
     "loader.js": "4.7.0",
     "prettier": "3.0.3",
-    "qunit": "2.20.1",
+    "qunit": "2.21.0",
     "release-it": "16.2.1",
     "release-it-lerna-changelog": "5.0.0",
     "rollup": "2.79.1",
diff --git a/packages/test-vite-app/package.json b/packages/test-vite-app/package.json
index 893a50f94..a8f5765e0 100644
--- a/packages/test-vite-app/package.json
+++ b/packages/test-vite-app/package.json
@@ -6,7 +6,7 @@
     "start": "vite"
   },
   "devDependencies": {
-    "qunit": "2.20.1",
+    "qunit": "2.21.0",
     "qunit-dom": "workspace:^",
     "vite": "4.5.0"
   },
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 6750bd07e..35b293de3 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -72,8 +72,8 @@ importers:
         specifier: 0.2.4
         version: 0.2.4
       qunit:
-        specifier: 2.20.1
-        version: 2.20.1
+        specifier: 2.21.0
+        version: 2.21.0
       release-it:
         specifier: 16.2.1
         version: 16.2.1(typescript@5.2.2)
@@ -140,7 +140,7 @@ importers:
         version: 4.0.8(@babel/core@7.23.7)
       '@types/ember-qunit':
         specifier: 6.1.1
-        version: 6.1.1(@ember/test-helpers@3.3.0)(ember-source@5.3.0)(qunit@2.20.1)
+        version: 6.1.1(@ember/test-helpers@3.3.0)(ember-source@5.3.0)(qunit@2.21.0)
       '@types/ember-resolver':
         specifier: 9.0.0
         version: 9.0.0(ember-source@5.3.0)
@@ -272,7 +272,7 @@ importers:
         version: 8.0.0
       ember-qunit:
         specifier: 8.0.2
-        version: 8.0.2(@ember/test-helpers@3.3.0)(ember-source@5.3.0)(qunit@2.20.1)
+        version: 8.0.2(@ember/test-helpers@3.3.0)(ember-source@5.3.0)(qunit@2.21.0)
       ember-resolver:
         specifier: 11.0.1
         version: 11.0.1(ember-source@5.3.0)
@@ -322,8 +322,8 @@ importers:
         specifier: 3.0.3
         version: 3.0.3
       qunit:
-        specifier: 2.20.1
-        version: 2.20.1
+        specifier: 2.21.0
+        version: 2.21.0
       release-it:
         specifier: 16.2.1
         version: 16.2.1(typescript@5.2.2)
@@ -409,8 +409,8 @@ importers:
   packages/test-vite-app:
     devDependencies:
       qunit:
-        specifier: 2.20.1
-        version: 2.20.1
+        specifier: 2.21.0
+        version: 2.21.0
       qunit-dom:
         specifier: workspace:^
         version: link:../qunit-dom
@@ -4786,11 +4786,11 @@ packages:
       '@types/ms': 0.7.32
     dev: true
 
-  /@types/ember-qunit@6.1.1(@ember/test-helpers@3.3.0)(ember-source@5.3.0)(qunit@2.20.1):
+  /@types/ember-qunit@6.1.1(@ember/test-helpers@3.3.0)(ember-source@5.3.0)(qunit@2.21.0):
     resolution: {integrity: sha512-1g5A3vPKhvB/CuN/EP9rBLXYaJOjzKyLYWeBtNDEQNkTuG1dAo/Hg0CCixgbBgLlzaDP8mR/n1xpg8HqQ8SUKg==}
     deprecated: This is a stub types definition. ember-qunit provides its own type definitions, so you do not need this installed.
     dependencies:
-      ember-qunit: 8.0.2(@ember/test-helpers@3.3.0)(ember-source@5.3.0)(qunit@2.20.1)
+      ember-qunit: 8.0.2(@ember/test-helpers@3.3.0)(ember-source@5.3.0)(qunit@2.21.0)
     transitivePeerDependencies:
       - '@ember/test-helpers'
       - '@glint/template'
@@ -9838,7 +9838,7 @@ packages:
       - supports-color
     dev: true
 
-  /ember-qunit@8.0.2(@ember/test-helpers@3.3.0)(ember-source@5.3.0)(qunit@2.20.1):
+  /ember-qunit@8.0.2(@ember/test-helpers@3.3.0)(ember-source@5.3.0)(qunit@2.21.0):
     resolution: {integrity: sha512-Rf60jeUTWNsF3Imf/FLujW/B/DFmKVXKmXO1lirTXjpertKfwRhp/3MnN8a/U/WyodTIsERkInGT1IqTtphCdQ==}
     peerDependencies:
       '@ember/test-helpers': '>=3.0.3'
@@ -9850,7 +9850,7 @@ packages:
       '@embroider/macros': 1.13.2
       ember-cli-test-loader: 3.1.0
       ember-source: 5.3.0(@babel/core@7.23.7)(@glimmer/component@1.1.2)(rsvp@4.8.5)(webpack@5.89.0)
-      qunit: 2.20.1
+      qunit: 2.21.0
     transitivePeerDependencies:
       - '@glint/template'
       - supports-color
@@ -16223,8 +16223,8 @@ packages:
       tiny-glob: 0.2.9
     dev: false
 
-  /qunit@2.20.1:
-    resolution: {integrity: sha512-scZfyhX8mmP3u/CN2y3CutQb+ppalbpqmm7g/X62M2yOt8ofzsxrRaC+MPmYm/tXxpzs9HGrVeCxZwLoP0tuAA==}
+  /qunit@2.21.0:
+    resolution: {integrity: sha512-kJJ+uzx5xDWk0oRrbOZ3zsm+imPULE58ZMIrNl+3POZl4a1k6VXj2E4OiqTmZ9j6hh9egE3kNgnAti9Q+BG6Yw==}
     engines: {node: '>=10'}
     hasBin: true
     dependencies: