diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 80d610c..fefcc5c 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -168,18 +168,18 @@ jobs:
       - name: Run the unit tests with code coverage
         run: composer coverage
 
-      # Uploading the results with PHP Coveralls v1 won't work from GH Actions, so switch the PHP version.
-      - name: Switch to PHP 7.4
-        if: ${{ success() && matrix.php != '7.4' }}
+      # PHP Coveralls v2 (which supports GH Actions) has a PHP 5.5 minimum, so switch the PHP version.
+      - name: Switch to PHP latest
+        if: ${{ success() && matrix.php == '5.4' }}
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 7.4
+          php-version: 'latest'
           coverage: none
 
-      # Global install is used to prevent a conflict with the local composer.lock in PHP 8.0+.
+      # Global install is used to prevent a conflict with the local composer.lock.
       - name: Install Coveralls
         if: ${{ success() }}
-        run: composer global require php-coveralls/php-coveralls:"^2.5.3" --no-interaction
+        run: composer global require php-coveralls/php-coveralls:"^2.6.0" --no-interaction
 
       - name: Upload coverage results to Coveralls (normal)
         if: ${{ success() && github.actor != 'dependabot[bot]' }}