diff --git a/package.json b/package.json
index b5c91fd8..f431387a 100644
--- a/package.json
+++ b/package.json
@@ -49,7 +49,7 @@
   },
   "devDependencies": {
     "@ember/optional-features": "^2.0.0",
-    "@ember/test-helpers": "^2.2.6",
+    "@ember/test-helpers": "^2.2.9",
     "@glimmer/component": "^1.0.3",
     "@glimmer/tracking": "^1.0.3",
     "@types/ember-qunit": "^3.4.13",
diff --git a/yarn.lock b/yarn.lock
index d1791570..a93d7347 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -998,28 +998,28 @@
     mkdirp "^1.0.4"
     silent-error "^1.1.1"
 
-"@ember/test-helpers@^2.2.6":
-  version "2.2.6"
-  resolved "https://registry.yarnpkg.com/@ember/test-helpers/-/test-helpers-2.2.6.tgz#48a5dd6f871dd531c81edfee8094991fd932dc12"
-  integrity sha512-nsrIeFeA2ZChLYp+qgOjpDKo0a294PVRJ3XZtid2alF4VjNTJPl+tyjQfnPje5kcQtADZlIGOqemNYC3HTo4Lg==
+"@ember/test-helpers@^2.2.9":
+  version "2.2.9"
+  resolved "https://registry.yarnpkg.com/@ember/test-helpers/-/test-helpers-2.2.9.tgz#68cceb50ad5b8adedad5d8bf73b39ff71a07f4a6"
+  integrity sha512-QLwV2ASk7XB9+SLCNKFu+y9iNbTsH2Ah3eaJiHZ01uDgVsYZZfJCINhUB9/sY19VagBQnP5Te3QowI6qw3XeLA==
   dependencies:
-    "@ember/test-waiters" "^2.4.3"
+    "@ember/test-waiters" "^2.4.4"
     broccoli-debug "^0.6.5"
-    broccoli-funnel "^3.0.3"
-    ember-cli-babel "^7.26.4"
+    broccoli-funnel "^3.0.6"
+    ember-cli-babel "^7.26.6"
     ember-cli-htmlbars "^5.7.1"
     ember-destroyable-polyfill "^2.0.3"
 
-"@ember/test-waiters@^2.4.3":
-  version "2.4.4"
-  resolved "https://registry.yarnpkg.com/@ember/test-waiters/-/test-waiters-2.4.4.tgz#4239d4cd9c60dc081d83e031463c22a628db028e"
-  integrity sha512-dhz4WplPWEPZ0Z8iJBI0uvUurv6Sk4aogNiI1XQxDXDNT13aE4WI/uQdsZXZtC+4xOUkz5V6Ob7iaEHDMixjbw==
+"@ember/test-waiters@^2.4.4":
+  version "2.4.5"
+  resolved "https://registry.yarnpkg.com/@ember/test-waiters/-/test-waiters-2.4.5.tgz#6e8e34d1bc46a9b0cc22cb11cc5936046e926031"
+  integrity sha512-833JvHtHdEfBfKXgvmw+6oziFOpVfD4NQrc04Ztj59A11K9FPNfZ3P8YydL7LFTtdd7UfJ/cYCLAm+OwUxbotQ==
   dependencies:
     calculate-cache-key-for-tree "^2.0.0"
-    ember-cli-babel "^7.26.2"
+    ember-cli-babel "^7.26.6"
     ember-cli-typescript "^4.1.0"
     ember-cli-version-checker "^5.1.2"
-    semver "^7.3.2"
+    semver "^7.3.5"
 
 "@embroider/core@0.33.0", "@embroider/core@^0.33.0":
   version "0.33.0"
@@ -3306,6 +3306,19 @@ broccoli-funnel@^3.0.3:
     path-posix "^1.0.0"
     walk-sync "^2.0.2"
 
+broccoli-funnel@^3.0.6:
+  version "3.0.8"
+  resolved "https://registry.yarnpkg.com/broccoli-funnel/-/broccoli-funnel-3.0.8.tgz#f5b62e2763c3918026a15a3c833edc889971279b"
+  integrity sha512-ng4eIhPYiXqMw6SyGoxPHR3YAwEd2lr9FgBI1CyTbspl4txZovOsmzFkMkGAlu88xyvYXJqHiM2crfLa65T1BQ==
+  dependencies:
+    array-equal "^1.0.0"
+    broccoli-plugin "^4.0.7"
+    debug "^4.1.1"
+    fs-tree-diff "^2.0.1"
+    heimdalljs "^0.2.0"
+    minimatch "^3.0.0"
+    walk-sync "^2.0.2"
+
 broccoli-kitchen-sink-helpers@^0.2.5:
   version "0.2.9"
   resolved "https://registry.yarnpkg.com/broccoli-kitchen-sink-helpers/-/broccoli-kitchen-sink-helpers-0.2.9.tgz#a5e0986ed8d76fb5984b68c3f0450d3a96e36ecc"
@@ -4819,7 +4832,7 @@ ember-cli-babel@^6.0.0-beta.4:
     ember-cli-version-checker "^2.1.2"
     semver "^5.5.0"
 
-ember-cli-babel@^7.0.0, ember-cli-babel@^7.13.0, ember-cli-babel@^7.13.2, ember-cli-babel@^7.22.1, ember-cli-babel@^7.23.0, ember-cli-babel@^7.23.1, ember-cli-babel@^7.26.2, ember-cli-babel@^7.26.4, ember-cli-babel@^7.26.5, ember-cli-babel@^7.7.3:
+ember-cli-babel@^7.0.0, ember-cli-babel@^7.13.0, ember-cli-babel@^7.13.2, ember-cli-babel@^7.22.1, ember-cli-babel@^7.23.0, ember-cli-babel@^7.23.1, ember-cli-babel@^7.26.5, ember-cli-babel@^7.26.6, ember-cli-babel@^7.7.3:
   version "7.26.6"
   resolved "https://registry.yarnpkg.com/ember-cli-babel/-/ember-cli-babel-7.26.6.tgz#322fbbd3baad9dd99e3276ff05bc6faef5e54b39"
   integrity sha512-040svtfj2RC35j/WMwdWJFusZaXmNoytLAMyBDGLMSlRvznudTxZjGlPV6UupmtTBApy58cEF8Fq4a+COWoEmQ==
@@ -10112,7 +10125,7 @@ semver@^6.0.0, semver@^6.1.0, semver@^6.1.1, semver@^6.1.2, semver@^6.3.0:
   resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"
   integrity sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==
 
-semver@^7.2.1, semver@^7.3.2, semver@^7.3.4:
+semver@^7.2.1, semver@^7.3.2, semver@^7.3.4, semver@^7.3.5:
   version "7.3.5"
   resolved "https://registry.yarnpkg.com/semver/-/semver-7.3.5.tgz#0b621c879348d8998e4b0e4be94b3f12e6018ef7"
   integrity sha512-PoeGJYh8HK4BTO/a9Tf6ZG3veo/A7ZVsYrSA6J8ny9nb3B1VrpkuN+z9OE5wfE5p6H4LchYZsegiQgbJD94ZFQ==