Update tests.yml

Author: staabm

.github/workflows/tests.yml

@@ -236,7 +236,9 @@ jobs:
 
       - name: "Upgrade PHPUnit with Paratest to speedup coverage generation"
         shell: bash
-        run: "composer require --dev phpunit/phpunit:^12 brianium/paratest --update-with-dependencies --ignore-platform-reqs --working-dir=tests"
+        run: |
+          composer require --dev phpunit/phpunit:^12 brianium/paratest --update-with-dependencies --ignore-platform-reqs --working-dir=tests
+          composer require --dev phpunit/phpunit:^12 --update-with-dependencies --ignore-platform-reqs
 
       - uses: "ramsey/composer-install@v3"
         with: