only unset php 7 and 8 polyfills

package_manager/tests/src/Build/TemplateProjectTestBase.php

@@ -439,7 +439,8 @@ END;
         ];
         if (isset($package_info['require'])) {
           foreach (array_keys($package_info['require']) as $package_name) {
-            if (str_starts_with($package_name, 'symfony/polyfill-')) {
+            // Do not require polyfill packages for PHP 7 or 8.
+            if (str_starts_with($package_name, 'symfony/polyfill-php7') || str_starts_with($package_name, 'symfony/polyfill-php8')) {
               unset($package_info['require'][$package_name]);
             }
           }