diff --git a/.github/workflows/upstream-check.yml b/.github/workflows/upstream-check.yml
index 8d9bf64..13dfdb0 100644
--- a/.github/workflows/upstream-check.yml
+++ b/.github/workflows/upstream-check.yml
@@ -5,7 +5,7 @@ on:
         types: [ opened, synchronize, reopened, ready_for_review ]
 
 jobs:
-    upstream_run:
+    run:
         name: ${{ matrix.repo }}@${{ matrix.branch }}
         runs-on: ubuntu-latest
         timeout-minutes: 10
@@ -34,30 +34,26 @@ jobs:
                 with:
                     repository: ${{ matrix.repo }}
                     ref: ${{ matrix.branch }}
-  
+
             -   name: Setup PHP
                 uses: shivammathur/setup-php@73963f5001e335723c998e4a0125ce060083985c # v2
                 with:
                     php-version: ${{ matrix.php }}
                     coverage: none
-  
-            -   name: set redaxo/php-cs-fixer-config to current branch
-                run: composer require redaxo/php-cs-fixer-config:dev-${{ github.head_ref }} --no-scripts --no-update --dev
-  
-            -   name: allow php-cs-fixer version required by redaxo/php-cs-fixer-config
-                run: composer require friendsofphp/php-cs-fixer:\* --no-scripts --no-update --dev
-  
-            -   uses: ramsey/composer-install@v3
-                if: hashFiles('composer.lock') != ''
-                with:
-                    dependency-versions: 'highest' # to trigger 'composer update' instead of 'composer install' but limited to redaxo/php-cs-fixer-config updates only
-                    composer-options: 'redaxo/php-cs-fixer-config --prefer-dist --no-progress --with-all-dependencies'
-  
-            -   uses: ramsey/composer-install@v3
-                if: hashFiles('composer.lock') == ''
+
+            -   name: Set redaxo/php-cs-fixer-config to main branch
+                run: composer require redaxo/php-cs-fixer-config:dev-main friendsofphp/php-cs-fixer:\* --dev --no-scripts --no-interaction --no-update --ansi
+
+            -   uses: ramsey/composer-install@0f18aec461938c57720faaf2dba4421bf698cf42 # v3
                 with:
-                    dependency-versions: 'highest' # to trigger 'composer update'
-                    composer-options: '--prefer-dist --no-progress --with-all-dependencies'
-  
-            -   name: run php-cs-fixer
-                run: vendor/bin/php-cs-fixer check -v --ansi --diff || exit 0
+                    dependency-versions: 'highest' # to trigger 'composer update' instead of 'composer install'
+                    composer-options: ${{ hashFiles('composer.lock') != '' && 'redaxo/php-cs-fixer-config' || '' }} --with-all-dependencies
+
+            -   name: Run php-cs-fixer with config from main branch
+                run: vendor/bin/php-cs-fixer fix -v --ansi --diff || exit 0
+
+            -   name: Set redaxo/php-cs-fixer-config to current branch
+                run: composer require redaxo/php-cs-fixer-config:dev-${{ github.head_ref }} --dev --with-all-dependencies --no-scripts --no-interaction --no-progress --ansi
+
+            -   name: Run php-cs-fixer
+                run: vendor/bin/php-cs-fixer check -v --ansi --diff || echo "::warning file=src/Config.php::New changes in ${{ matrix.repo }}@${{ matrix.branch }}."