diff --git a/.github/workflows/test-node21.yml b/.github/workflows/test-node21.yml
new file mode 100644
index 0000000..2ec8654
--- /dev/null
+++ b/.github/workflows/test-node21.yml
@@ -0,0 +1,25 @@
+name: Node Test
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [21.x]
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: "npm"
+      - name: npm test
+        run: |
+          npm ci
+          npm run test:node21
+        env:
+          CI: true
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c7e25cc..7ba7818 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -8,7 +8,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [18.x, 20.x, 21.x]
+        node-version: [18.x, 20.x]
 
     steps:
       - uses: actions/checkout@v4
diff --git a/package-lock.json b/package-lock.json
index b076690..94dcd18 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1061,11 +1061,11 @@
             }
         },
         "node_modules/@hckrnews/mutator": {
-            "version": "0.3.2",
-            "resolved": "https://registry.npmjs.org/@hckrnews/mutator/-/mutator-0.3.2.tgz",
-            "integrity": "sha512-Dso+VPPN2KFqzQwtZ+mqm7nEfWYqkl4FREKxI9+I/x0oGxiiydHdBCTZM1yqTQPsPzL2ZzxkKpsGsNwPbcjoBA==",
+            "version": "0.3.3",
+            "resolved": "https://registry.npmjs.org/@hckrnews/mutator/-/mutator-0.3.3.tgz",
+            "integrity": "sha512-mzm4toPJBdM0SBb6suwe1GCHw/LA4lJYKCHrKwwqxbdMp7k9j5qmGwDsh2uofrUuui+tGlZ2ETes55Sro9/9ZA==",
             "engines": {
-                "node": ">= 14"
+                "node": ">= 18"
             }
         },
         "node_modules/@hckrnews/objects": {
diff --git a/package.json b/package.json
index d9dae63..5c4229f 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,8 @@
         "lint": "eslint src/*.js --config .eslintrc",
         "lint:report": "eslint src/*.js --config .eslintrc -f json -o report.json",
         "lint:fix": "eslint src/*.js --config .eslintrc --fix",
-        "test": "c8 node --test src/**/*.js",
+        "test": "c8 node --test src/",
+        "test:node21": "c8 node --test 'src/**/*.js'",
         "cpd": "node_modules/jscpd/bin/jscpd src",
         "vulnerabilities": "npm audit --omit=dev"
     },