diff --git a/packages/test-app/package.json b/packages/test-app/package.json
index 6be47460..8b1ec469 100644
--- a/packages/test-app/package.json
+++ b/packages/test-app/package.json
@@ -27,7 +27,7 @@
     "@babel/eslint-parser": "7.25.7",
     "@ember/optional-features": "2.1.0",
     "@ember/string": "4.0.0",
-    "@ember/test-helpers": "3.3.1",
+    "@ember/test-helpers": "4.0.4",
     "@embroider/test-setup": "4.0.0",
     "@eslint/eslintrc": "3.1.0",
     "@eslint/js": "9.12.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index b56d2044..351ccf98 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -88,8 +88,8 @@ importers:
         specifier: 4.0.0
         version: 4.0.0
       '@ember/test-helpers':
-        specifier: 3.3.1
-        version: 3.3.1(@babel/core@7.25.7)(ember-source@5.12.0(@glimmer/component@1.1.2(@babel/core@7.25.7))(rsvp@4.8.5)(webpack@5.95.0))(webpack@5.95.0)
+        specifier: 4.0.4
+        version: 4.0.4(@babel/core@7.25.7)(ember-source@5.12.0(@glimmer/component@1.1.2(@babel/core@7.25.7))(rsvp@4.8.5)(webpack@5.95.0))
       '@embroider/test-setup':
         specifier: 4.0.0
         version: 4.0.0(@embroider/core@3.4.17)
@@ -155,7 +155,7 @@ importers:
         version: 8.2.3(ember-source@5.12.0(@glimmer/component@1.1.2(@babel/core@7.25.7))(rsvp@4.8.5)(webpack@5.95.0))
       ember-qunit:
         specifier: 8.1.0
-        version: 8.1.0(@ember/test-helpers@3.3.1(@babel/core@7.25.7)(ember-source@5.12.0(@glimmer/component@1.1.2(@babel/core@7.25.7))(rsvp@4.8.5)(webpack@5.95.0))(webpack@5.95.0))(ember-source@5.12.0(@glimmer/component@1.1.2(@babel/core@7.25.7))(rsvp@4.8.5)(webpack@5.95.0))(qunit@2.22.0)
+        version: 8.1.0(@ember/test-helpers@4.0.4(@babel/core@7.25.7)(ember-source@5.12.0(@glimmer/component@1.1.2(@babel/core@7.25.7))(rsvp@4.8.5)(webpack@5.95.0)))(ember-source@5.12.0(@glimmer/component@1.1.2(@babel/core@7.25.7))(rsvp@4.8.5)(webpack@5.95.0))(qunit@2.22.0)
       ember-resolver:
         specifier: 13.0.2
         version: 13.0.2(ember-source@5.12.0(@glimmer/component@1.1.2(@babel/core@7.25.7))(rsvp@4.8.5)(webpack@5.95.0))
@@ -960,11 +960,10 @@ packages:
   '@ember/string@4.0.0':
     resolution: {integrity: sha512-IMVyVE72twuAMSYcHzWSgtgYTtzlHlKSGW8vEbztnnmkU6uo7kVHmiqSN9R4RkBhzvh0VD4G76Eph+55t3iNIA==}
 
-  '@ember/test-helpers@3.3.1':
-    resolution: {integrity: sha512-h4uFBy4pquBtHsHI+tx9S0wtMmn1L+8dkXiDiyoqG1+3e0Awk6GBujiFM9s4ANq6wC8uIhC3wEFyts10h2OAoQ==}
-    engines: {node: 16.* || >= 18}
+  '@ember/test-helpers@4.0.4':
+    resolution: {integrity: sha512-1mbOVyVEcLxYOGzBaeeaQkCrL1o9Av86QaHk/1RvrVBW24I6YUj1ILLEi2qLZT5PzcCy0TdfadHT3hKJwJ0GcQ==}
     peerDependencies:
-      ember-source: ^4.0.0 || ^5.0.0
+      ember-source: '>= 4.0.0'
 
   '@ember/test-waiters@3.1.0':
     resolution: {integrity: sha512-bb9h95ktG2wKY9+ja1sdsFBdOms2lB19VWs8wmNpzgHv1NCetonBoV5jHBV4DHt0uS1tg9z66cZqhUVlYs96KQ==}
@@ -2758,6 +2757,9 @@ packages:
     resolution: {integrity: sha512-BzRPQuY1ip+qDonAOz42gRm/pg9F768C+npV/4JOsxRC2sq+Rlk+Q4ZCAsOhnIaMrgarILY+RMUIvMmmX1qAEA==}
     engines: {node: '>=4'}
 
+  decorator-transforms@2.2.2:
+    resolution: {integrity: sha512-NHCSJXOUQ29YFli1QzstXWo72EyASpoVx+s0YdkMwswpovf/iAJP580nD1tB0Ph9exvtbfWdVrSAloXrWVo1Xg==}
+
   deep-extend@0.6.0:
     resolution: {integrity: sha512-LOHxIOaPYdHlJRtCQfDIVZtfw/ufM8+rVj649RIHzcm/vGwQRXFt6OPqIFWsm2XEMrNIEtWR64sY1LEKD2vAOA==}
     engines: {node: '>=4.0.0'}
@@ -7599,23 +7601,19 @@ snapshots:
 
   '@ember/string@4.0.0': {}
 
-  '@ember/test-helpers@3.3.1(@babel/core@7.25.7)(ember-source@5.12.0(@glimmer/component@1.1.2(@babel/core@7.25.7))(rsvp@4.8.5)(webpack@5.95.0))(webpack@5.95.0)':
+  '@ember/test-helpers@4.0.4(@babel/core@7.25.7)(ember-source@5.12.0(@glimmer/component@1.1.2(@babel/core@7.25.7))(rsvp@4.8.5)(webpack@5.95.0))':
     dependencies:
       '@ember/test-waiters': 3.1.0
-      '@embroider/macros': 1.16.6
+      '@embroider/addon-shim': 1.8.9
+      '@embroider/macros': 1.16.7
       '@simple-dom/interface': 1.4.0
-      broccoli-debug: 0.6.5
-      broccoli-funnel: 3.0.8
+      decorator-transforms: 2.2.2(@babel/core@7.25.7)
       dom-element-descriptors: 0.5.1
-      ember-auto-import: 2.8.1(webpack@5.95.0)
-      ember-cli-babel: 8.2.0(@babel/core@7.25.7)
-      ember-cli-htmlbars: 6.3.0
       ember-source: 5.12.0(@glimmer/component@1.1.2(@babel/core@7.25.7))(rsvp@4.8.5)(webpack@5.95.0)
     transitivePeerDependencies:
       - '@babel/core'
       - '@glint/template'
       - supports-color
-      - webpack
 
   '@ember/test-waiters@3.1.0':
     dependencies:
@@ -9924,6 +9922,13 @@ snapshots:
     dependencies:
       mimic-response: 1.0.1
 
+  decorator-transforms@2.2.2(@babel/core@7.25.7):
+    dependencies:
+      '@babel/plugin-syntax-decorators': 7.25.7(@babel/core@7.25.7)
+      babel-import-util: 3.0.0
+    transitivePeerDependencies:
+      - '@babel/core'
+
   deep-extend@0.6.0: {}
 
   deep-is@0.1.4: {}
@@ -10528,9 +10533,9 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
-  ember-qunit@8.1.0(@ember/test-helpers@3.3.1(@babel/core@7.25.7)(ember-source@5.12.0(@glimmer/component@1.1.2(@babel/core@7.25.7))(rsvp@4.8.5)(webpack@5.95.0))(webpack@5.95.0))(ember-source@5.12.0(@glimmer/component@1.1.2(@babel/core@7.25.7))(rsvp@4.8.5)(webpack@5.95.0))(qunit@2.22.0):
+  ember-qunit@8.1.0(@ember/test-helpers@4.0.4(@babel/core@7.25.7)(ember-source@5.12.0(@glimmer/component@1.1.2(@babel/core@7.25.7))(rsvp@4.8.5)(webpack@5.95.0)))(ember-source@5.12.0(@glimmer/component@1.1.2(@babel/core@7.25.7))(rsvp@4.8.5)(webpack@5.95.0))(qunit@2.22.0):
     dependencies:
-      '@ember/test-helpers': 3.3.1(@babel/core@7.25.7)(ember-source@5.12.0(@glimmer/component@1.1.2(@babel/core@7.25.7))(rsvp@4.8.5)(webpack@5.95.0))(webpack@5.95.0)
+      '@ember/test-helpers': 4.0.4(@babel/core@7.25.7)(ember-source@5.12.0(@glimmer/component@1.1.2(@babel/core@7.25.7))(rsvp@4.8.5)(webpack@5.95.0))
       '@embroider/addon-shim': 1.8.9
       '@embroider/macros': 1.16.6
       ember-cli-test-loader: 3.1.0