diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f802583..bcb0cb4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,9 +29,10 @@ jobs:
             composer update --no-interaction --no-progress --prefer-dist --prefer-${{ matrix.release }}
       - name: Run tests
         run: |
-          docker compose -f docker-compose.yml -f docker-compose.ci.yml run --rm php${{ matrix.php }} \
+          docker compose -f docker-compose.yml -f docker-compose.ci.yml run --rm php${{ matrix.php }}${{ env.DEBUG }} \
             vendor/bin/phpunit ${{ env.COVERAGE }}
         env:
+          DEBUG: ${{ matrix.coverage && '-debug' || '' }}
           COVERAGE: ${{ matrix.coverage && '--coverage-clover=coverage.xml' || '' }}
       - name: Upload code coverage
         uses: codecov/codecov-action@v3
diff --git a/docker-compose.ci.yml b/docker-compose.ci.yml
index a515bef..d6755c7 100644
--- a/docker-compose.ci.yml
+++ b/docker-compose.ci.yml
@@ -14,6 +14,12 @@ services:
       - .:/var/www/html:delegated
       - ~/.cache/composer/files:/root/.composer/cache/files
   php8.3:
+    image: ghcr.io/staudenmeir/php:8.3
+    working_dir: /var/www/html
+    volumes:
+      - .:/var/www/html:delegated
+      - ~/.cache/composer/files:/root/.composer/cache/files
+  php8.3-debug:
     image: ghcr.io/staudenmeir/php:8.3
     working_dir: /var/www/html
     volumes: