Pull in Mockery for mocking.

composer.json

@@ -8,6 +8,7 @@
 		"laravel/framework": "5.1.*"
 	},
 	"require-dev": {
+		"mockery/mockery": "0.9.*",
 		"phpunit/phpunit": "~4.0",
 		"phpspec/phpspec": "~2.1"
 	},