composer require -W --dev spatie/phpunit-watcher

composer.json

@@ -56,6 +56,7 @@
         "phpstan/phpstan": "^2.1",
         "phpunit/phpunit": "^9.6",
         "rregeer/phpunit-coverage-check": "^0.3.1",
+        "spatie/phpunit-watcher": "^1.23",
         "squizlabs/php_codesniffer": "^4.0"
     },
     "config": {
@@ -67,10 +68,7 @@
     },
     "scripts": {
         "test": "phpunit",
-        "test-watcher": [
+        "test-watcher": "phpunit-watcher watch",
-            "phpunit-watcher || composer global require spatie/phpunit-watcher --dev",
-            "phpunit-watcher watch"
-        ],
         "test-coverage": [
             "rm -f clover.xml",
             "@putenv XDEBUG_MODE=coverage",