diff --git a/.github/workflows/TestFunctional.yml b/.github/workflows/TestFunctional.yml
index 6bcf3fc91..25b5cb76c 100644
--- a/.github/workflows/TestFunctional.yml
+++ b/.github/workflows/TestFunctional.yml
@@ -215,6 +215,59 @@ jobs:
           name: test_result
           path: test_result
 
+  Test-Yarn-4-Node-Linker:
+    runs-on: ubuntu-22.04
+    needs: Build
+    steps:
+      - uses: actions/download-artifact@v3
+        with:
+          name: test-functional-build
+
+      - name: Restore Workspace
+        run: |
+          cd ../
+          mv ${{ github.workspace }}/drainpipe.zip /tmp/drainpipe.zip
+          unzip -o /tmp/drainpipe.zip -d ${{ github.workspace }}
+          cd ${{ github.workspace }}
+
+      - uses: ./drainpipe/scaffold/github/actions/common/set-env
+
+      - name: Install DDEV
+        uses: ./drainpipe/scaffold/github/actions/common/ddev
+        with:
+          git-name: Drainpipe Bot
+          git-email: no-reply@example.com#
+
+      - name: Start DDEV
+        run: ddev start
+
+      - name: Setup Nightwatch
+        run: |
+          ddev config --nodejs-version=21
+          ddev restart
+          ddev yarn set version berry
+          ddev yarn set version 4
+          ddev yarn init -y
+          yarn config set nodeLinker node-modules
+          ddev yarn add nightwatch nightwatch-accessibility @lullabot/nightwatch-drupal-commands lodash --dev
+
+      - name: Install Drupal
+        run: |
+          ddev drush --yes site:install
+          ddev drush --uri=https://drupal_firefox --yes site:install
+          ddev drush --uri=https://drupal_chrome --yes site:install
+          ddev drush config:export --yes
+
+      - name: Run Functional Tests
+        run: ddev task test:functional
+
+      - name: Upload test artifacts
+        if: ${{ always() }}
+        uses: actions/upload-artifact@v3
+        with:
+          name: test_result
+          path: test_result
+
   Test-Yarn-3:
     runs-on: ubuntu-22.04
     needs: Build
@@ -250,10 +303,63 @@ jobs:
           echo '  "nightwatch@*":' >> .yarnrc.yml
           echo '    dependencies:' >> .yarnrc.yml
           echo '      ws: "*"' >> .yarnrc.yml
-          echo '      lodash: "*"' >> .yarnrc.yml
-          echo '      rimraf: "*"' >> .yarnrc.yml
           ddev yarn add nightwatch nightwatch-axe-verbose @lullabot/nightwatch-drupal-commands --dev
-          yarn
+
+      - name: Install Drupal
+        run: |
+          ddev drush --yes site:install
+          ddev drush --uri=https://drupal_firefox --yes site:install
+          ddev drush --uri=https://drupal_chrome --yes site:install
+          ddev drush config:export --yes
+
+      - name: Run Functional Tests
+        run: ddev task test:functional
+
+      - name: Upload test artifacts
+        if: ${{ always() }}
+        uses: actions/upload-artifact@v3
+        with:
+          name: test_result
+          path: test_result
+
+  Test-Yarn-4:
+    runs-on: ubuntu-22.04
+    needs: Build
+    steps:
+      - uses: actions/download-artifact@v3
+        with:
+          name: test-functional-build
+
+      - name: Restore Workspace
+        run: |
+          cd ../
+          mv ${{ github.workspace }}/drainpipe.zip /tmp/drainpipe.zip
+          unzip -o /tmp/drainpipe.zip -d ${{ github.workspace }}
+          cd ${{ github.workspace }}
+
+      - uses: ./drainpipe/scaffold/github/actions/common/set-env
+
+      - name: Install DDEV
+        uses: ./drainpipe/scaffold/github/actions/common/ddev
+        with:
+          git-name: Drainpipe Bot
+          git-email: no-reply@example.com#
+
+      - name: Start DDEV
+        run: ddev start
+
+      - name: Setup Nightwatch
+        run: |
+          ddev config --nodejs-version=21
+          ddev restart
+          ddev yarn set version berry
+          ddev yarn init -y
+          echo "packageExtensions:" >> .yarnrc.yml
+          echo '  "nightwatch@*":' >> .yarnrc.yml
+          echo '    dependencies:' >> .yarnrc.yml
+          echo '      ws: "*"' >> .yarnrc.yml
+          ddev yarn cache clear
+          ddev yarn add nightwatch nightwatch-axe-verbose @lullabot/nightwatch-drupal-commands --dev
 
       - name: Install Drupal
         run: |
diff --git a/.github/workflows/TestMetapackages.yml b/.github/workflows/TestMetapackages.yml
index 7ddd48f32..78cfe55a5 100644
--- a/.github/workflows/TestMetapackages.yml
+++ b/.github/workflows/TestMetapackages.yml
@@ -133,7 +133,7 @@ jobs:
       - name: Compile Sass
         run: ddev task sass
 
-  Test-Sass-Yarn-Berry:
+  Test-Sass-Yarn-3:
      runs-on: ubuntu-22.04
      needs: Build
      steps:
@@ -169,6 +169,45 @@ jobs:
        - name: Compile Sass
          run: ddev task sass
 
+  Test-Sass-Yarn-4:
+    runs-on: ubuntu-22.04
+    needs: Build
+    steps:
+      - uses: actions/download-artifact@v3
+        with:
+          name: test-metapackage-build
+
+      - name: Restore Workspace
+        run: |
+          cd ../
+          mv ${{ github.workspace }}/drainpipe.zip /tmp/drainpipe.zip
+          unzip -o /tmp/drainpipe.zip -d ${{ github.workspace }}
+          cd ${{ github.workspace }}
+
+      - uses: ./drainpipe/scaffold/github/actions/common/set-env
+
+      - name: Install DDEV
+        uses: ./drainpipe/scaffold/github/actions/common/ddev
+        with:
+          git-name: Drainpipe Bot
+          git-email: no-reply@example.com#
+
+      - name: Start DDEV
+        run: ddev start
+
+      - name: Setup Sass
+        run: |
+          ddev config --nodejs-version=21
+          ddev restart
+          ddev yarn set version berry
+          ddev yarn set version 4
+          ddev yarn init -y
+          ddev yarn cache clear
+          ddev yarn add ./drainpipe/metapackages/sass --dev
+
+      - name: Compile Sass
+        run: ddev task sass
+
   Test-JavaScript-NPM:
     runs-on: ubuntu-22.04
     needs: Build
@@ -240,7 +279,7 @@ jobs:
       - name: Compile JavaScript
         run: ddev task javascript
 
-  Test-JavaScript-Yarn-Berry:
+  Test-JavaScript-Yarn-3:
     runs-on: ubuntu-22.04
     needs: Build
     steps:
@@ -276,3 +315,43 @@ jobs:
 
       - name: Compile JavaScript
         run: ddev task javascript
+
+  Test-JavaScript-Yarn-4:
+    runs-on: ubuntu-22.04
+    needs: Build
+    steps:
+      - uses: actions/download-artifact@v3
+        with:
+          name: test-metapackage-build
+
+      - name: Restore Workspace
+        run: |
+          cd ../
+          mv ${{ github.workspace }}/drainpipe.zip /tmp/drainpipe.zip
+          unzip -o /tmp/drainpipe.zip -d ${{ github.workspace }}
+          cd ${{ github.workspace }}
+
+      - uses: ./drainpipe/scaffold/github/actions/common/set-env
+
+      - name: Install DDEV
+        uses: ./drainpipe/scaffold/github/actions/common/ddev
+        with:
+          git-name: Drainpipe Bot
+          git-email: no-reply@example.com#
+
+      - name: Start DDEV
+        run: ddev start
+
+      - name: Setup Sass
+        run: |
+          ddev config --nodejs-version=21
+          ddev restart
+          ddev yarn set version berry
+          ddev yarn set version 4
+          ddev yarn init -y
+          ddev yarn cache clear
+          ddev yarn add focus-trap@^6.7.3
+          ddev yarn add ./drainpipe/metapackages/javascript --dev
+
+      - name: Compile JavaScript
+        run: ddev task javascript
diff --git a/tasks/test.yml b/tasks/test.yml
index 7f8ad89ca..5608db95a 100644
--- a/tasks/test.yml
+++ b/tasks/test.yml
@@ -205,9 +205,9 @@ tasks:
     interactive: true
     cmds:
       - |
-        PACKAGES="nightwatch nightwatch-axe-verbose @lullabot/nightwatch-drupal-commands"
+        PACKAGES="nightwatch @lullabot/nightwatch-drupal-commands"
         if [ ! -f "package.json" ]; then
-          echo -n "No package.json exists, would you like to use yarn1, npm, or yarn? "
+          echo -n "No package.json exists, would you like to use yarn1, npm, yarn3 (node <= 20), or yarn (node >= 21)? "
           read -r PACKAGE_MANAGER
           if [ "$PACKAGE_MANAGER" == "npm" ]; then
             if [ "$IS_DDEV_PROJECT" == "true" ]; then
@@ -219,7 +219,7 @@ tasks:
             yarn set version classic
             yarn init -y
             yarn add $PACKAGES lodash --dev
-          elif [ "$PACKAGE_MANAGER" == "yarn" ]; then
+          elif [ "$PACKAGE_MANAGER" == "yarn3" ]; then
             yarn set version berry
             yarn set version 3
             yarn init
@@ -227,7 +227,15 @@ tasks:
             echo '  "nightwatch@*":' >> .yarnrc.yml
             echo '    dependencies:' >> .yarnrc.yml
             echo '      ws: "*"' >> .yarnrc.yml
-            echo '      lodash: "*"' >> .yarnrc.yml
+            yarn add $PACKAGES --dev
+          elif [ "$PACKAGE_MANAGER" == "yarn" ]; then
+            yarn set version berry
+            yarn init
+            echo "packageExtensions:" >> .yarnrc.yml
+            echo '  "nightwatch@*":' >> .yarnrc.yml
+            echo '    dependencies:' >> .yarnrc.yml
+            echo '      ws: "*"' >> .yarnrc.yml
+            yarn cache clear
             yarn add $PACKAGES --dev
           else
             echo "Sorry I'm not aware of that package manager. Please first init package.json with it yourself manually."
diff --git a/tests/local-test.sh b/tests/local-test.sh
index a232746c0..2be72c535 100755
--- a/tests/local-test.sh
+++ b/tests/local-test.sh
@@ -28,17 +28,16 @@ echo "    - exec: mysql -uroot -proot -hdb -e \"CREATE DATABASE IF NOT EXISTS fi
 echo "    - exec: mysql -uroot -proot -hdb -e \"CREATE DATABASE IF NOT EXISTS chrome; GRANT ALL ON chrome.* TO 'db'@'%';\"" >> .ddev/config.yaml
 ddev config --web-environment="NIGHTWATCH_DRUPAL_URL_FIREFOX=https://drupal_firefox,NIGHTWATCH_DRUPAL_URL_CHROME=https://drupal_chrome"
 ddev config --additional-hostnames="*.drainpipe"
+ddev config --nodejs-version=21
 ddev restart
 
 ddev yarn set version berry
-ddev yarn set version 3
 ddev yarn init -y
+ddev yarn cache clear
 echo "packageExtensions:" >> .yarnrc.yml
 echo '  "nightwatch@*":' >> .yarnrc.yml
 echo '    dependencies:' >> .yarnrc.yml
 echo '      ws: "*"' >> .yarnrc.yml
-echo '      lodash: "*"' >> .yarnrc.yml
-echo '      rimraf: "*"' >> .yarnrc.yml
 ddev yarn add nightwatch nightwatch-axe-verbose @lullabot/nightwatch-drupal-commands --dev
 yarn