diff --git a/.github/workflows/phpunit-tests-run.yml b/.github/workflows/phpunit-tests-run.yml
deleted file mode 100644
index 871585d572d35..0000000000000
--- a/.github/workflows/phpunit-tests-run.yml
+++ /dev/null
@@ -1,188 +0,0 @@
-##
-# A callable workflow that runs the PHPUnit test suite with the specified configuration.
-##
-name: Run PHPUnit tests
-
-on:
-  workflow_call:
-    inputs:
-      os:
-        description: 'Operating system to run tests on'
-        required: false
-        type: 'string'
-        default: 'ubuntu-latest'
-      php:
-        description: 'The version of PHP to use, in the format of X.Y'
-        required: true
-        type: 'string'
-      db-type:
-        description: 'Database type. Valid types are mysql and mariadb'
-        required: false
-        type: 'string'
-        default: 'mysql'
-      db-version:
-        description: 'Database version'
-        required: false
-        type: 'string'
-        default: '8.0'
-      multisite:
-        description: 'Whether to run tests as multisite'
-        required: false
-        type: 'boolean'
-        default: false
-      memcached:
-        description: 'Whether to test with memcached enabled'
-        required: false
-        type: 'boolean'
-        default: false
-      phpunit-config:
-        description: 'The PHPUnit configuration file to use'
-        required: false
-        type: 'string'
-        default: 'phpunit.xml.dist'
-      report:
-        description: 'Whether to report results to WordPress.org Hosting Tests'
-        required: false
-        type: 'boolean'
-        default: false
-env:
-  LOCAL_PHP: ${{ inputs.php }}-fpm
-  LOCAL_DB_TYPE: ${{ inputs.db-type }}
-  LOCAL_DB_VERSION: ${{ inputs.db-version }}
-  LOCAL_PHP_MEMCACHED: ${{ inputs.memcached }}
-  PHPUNIT_CONFIG: ${{ inputs.phpunit-config }}
-  PUPPETEER_SKIP_DOWNLOAD: ${{ true }}
-
-jobs:
-  # Runs the PHPUnit tests for WordPress.
-  #
-  # Performs the following steps:
-  # - Sets environment variables.
-  # - Checks out the repository.
-  # - Sets up Node.js.
-  # - Sets up PHP.
-  # - Installs Composer dependencies.
-  # - Installs npm dependencies
-  # - Logs general debug information about the runner.
-  # - Logs Docker debug information (about the Docker installation within the runner).
-  # - Starts the WordPress Docker container.
-  # - Logs the running Docker containers.
-  # - Logs debug information about what's installed within the WordPress Docker containers.
-  # - Install WordPress within the Docker container.
-  # - Run the PHPUnit tests.
-  # - Ensures version-controlled files are not modified or deleted.
-  # - Checks out the WordPress Test reporter repository.
-  # - Submit the test results to the WordPress.org host test results.
-  phpunit-tests:
-    name: PHP ${{ inputs.php }} / ${{ 'mariadb' == inputs.db-type && 'MariaDB' || 'MySQL' }} ${{ inputs.db-version }}${{ inputs.multisite && ' multisite' || '' }}${{ inputs.memcached && ' with memcached' || '' }}${{ inputs.report && ' (test reporting enabled)' || '' }}
-    runs-on: ${{ inputs.os }}
-    timeout-minutes: 20
-
-    steps:
-      - name: Configure environment variables
-        run: |
-          echo "PHP_FPM_UID=$(id -u)" >> $GITHUB_ENV
-          echo "PHP_FPM_GID=$(id -g)" >> $GITHUB_ENV
-
-      - name: Checkout repository
-        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
-        with:
-          show-progress: ${{ runner.debug == '1' && 'true' || 'false' }}
-
-      - name: Set up Node.js
-        uses: actions/setup-node@5e21ff4d9bc1a8cf6de233a3057d20ec6b3fb69d # v3.8.1
-        with:
-          node-version-file: '.nvmrc'
-          cache: npm
-
-      ##
-      # This allows Composer dependencies to be installed using a single step.
-      #
-      # Since the tests are currently run within the Docker containers where the PHP version varies,
-      # the same PHP version needs to be configured for the action runner machine so that the correct
-      # dependency versions are installed and cached.
-      ##
-      - name: Set up PHP
-        uses: shivammathur/setup-php@4bd44f22a98a19e0950cbad5f31095157cc9621b # v2.25.4
-        with:
-          php-version: '${{ inputs.php }}'
-          coverage: none
-
-      # Since Composer dependencies are installed using `composer update` and no lock file is in version control,
-      # passing a custom cache suffix ensures that the cache is flushed at least once per week.
-      - name: Install Composer dependencies
-        uses: ramsey/composer-install@83af392bf5f031813d25e6fe4cd626cdba9a2df6 # v2.2.0
-        with:
-          custom-cache-suffix: $(/bin/date -u --date='last Mon' "+%F")
-
-      - name: Install npm dependencies
-        run: npm ci
-
-      - name: General debug information
-        run: |
-          npm --version
-          node --version
-          curl --version
-          git --version
-          svn --version
-          composer --version
-          locale -a
-
-      - name: Docker debug information
-        run: |
-          docker -v
-          docker-compose -v
-
-      - name: Start Docker environment
-        run: |
-          npm run env:start
-
-      - name: Log running Docker containers
-        run: docker ps -a
-
-      - name: WordPress Docker container debug information
-        run: |
-          docker-compose run --rm mysql ${{ env.LOCAL_DB_TYPE }} --version
-          docker-compose run --rm php php --version
-          docker-compose run --rm php php -m
-          docker-compose run --rm php php -i
-          docker-compose run --rm php locale -a
-
-      - name: Install WordPress
-        run: npm run env:install
-
-      - name: Run PHPUnit tests
-        run: node ./tools/local-env/scripts/docker.js run php ./vendor/bin/phpunit --verbose -c ${{ env.PHPUNIT_CONFIG }}
-
-      - name: Run AJAX tests
-        run: node ./tools/local-env/scripts/docker.js run php ./vendor/bin/phpunit --verbose -c ${{ env.PHPUNIT_CONFIG }} --group ajax
-
-      - name: Run ms-files tests as a multisite install
-        if: ${{ inputs.multisite }}
-        run: node ./tools/local-env/scripts/docker.js run php ./vendor/bin/phpunit --verbose -c ${{ env.PHPUNIT_CONFIG }} --group ms-files
-
-      - name: Run external HTTP tests
-        if: ${{ ! inputs.multisite }}
-        run: node ./tools/local-env/scripts/docker.js run php ./vendor/bin/phpunit --verbose -c ${{ env.PHPUNIT_CONFIG }} --group external-http
-
-      # __fakegroup__ is excluded to force PHPUnit to ignore the <exclude> settings in phpunit.xml.dist.
-      - name: Run (Xdebug) tests
-        if: ${{ inputs.php != '8.3' }}
-        run: LOCAL_PHP_XDEBUG=true node ./tools/local-env/scripts/docker.js run php ./vendor/bin/phpunit -v --group xdebug --exclude-group __fakegroup__
-
-      - name: Ensure version-controlled files are not modified or deleted
-        run: git diff --exit-code
-
-      - name: Checkout the WordPress Test Reporter
-        if: ${{ github.repository == 'WordPress/wordpress-develop' && github.ref == 'refs/heads/trunk' && inputs.report }}
-        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
-        with:
-          repository: 'WordPress/phpunit-test-runner'
-          path: 'test-runner'
-          show-progress: ${{ runner.debug == '1' && 'true' || 'false' }}
-
-      - name: Submit test results to the WordPress.org host test results
-        if: ${{ github.repository == 'WordPress/wordpress-develop' && github.ref == 'refs/heads/trunk' && inputs.report }}
-        env:
-          WPT_REPORT_API_KEY: "${{ secrets.WPT_REPORT_API_KEY }}"
-        run: docker-compose run --rm -e WPT_REPORT_API_KEY -e WPT_PREPARE_DIR=/var/www -e WPT_TEST_DIR=/var/www php php test-runner/report.php