diff --git a/composer.json b/composer.json
index 8f67131..7673647 100644
--- a/composer.json
+++ b/composer.json
@@ -1,15 +1,18 @@
 {
 	"config": {
 		"optimize-autoloader": true,
 		"prepend-autoloader": false
 	},
 	"require-dev": {
 		"jakub-onderka/php-parallel-lint": "0.9.2",
-		"jakub-onderka/php-console-highlighter": "0.3.2"
+		"jakub-onderka/php-console-highlighter": "0.3.2",
+		"mediawiki/minus-x": "0.2.1"
 	},
 	"scripts": {
+		"fix": "minus-x fix .",
 		"test": [
-			"parallel-lint . --exclude vendor --exclude node_modules"
+			"parallel-lint . --exclude vendor --exclude node_modules",
+			"minus-x check ."
 		]
 	}
 }