docker run --rm \

  -u "$(id -u):$(id -g)" \
  -v "$(pwd)":/var/www/html \
  -w /var/www/html \
  laravelsail/php84-composer:latest \
  composer require --dev orchestra/testbench

Author: bst27

composer.json

@@ -23,5 +23,8 @@
         "laravel/framework": "^11.0|^12.0",
         "spatie/image-optimizer": "^1.8",
         "ext-openssl": "*"
+    },
+    "require-dev": {
+        "orchestra/testbench": "^10.4"
     }
 }