Laracasts/TestDummy : setting up lots of similar factories pattern

gistfile1.php

// Grade

$grade_defaults = [
	'courseid' 		=> 'factory:App\Models\Course',
	'itemname' 		=> $faker->sentence,
	'itemtype' 		=> $faker->word,
	'score' 		=> $faker->randomFloat(2, 0, 1),
	'grademax' 		=> 100
];

$factory('App\Models\Grade', 
	$grade_defaults
);

	$factory('App\Models\Grade', 'grade_grademax_not_100', array_merge(
		$grade_defaults,
		[
			'grademax' 		=> $faker->numberBetween(1,100)
		])
	);
	$factory('App\Models\Grade', 'grade_score_10',  array_merge(
		$grade_defaults,
		[
			'score' => 10
		])
	);
	$factory('App\Models\Grade', 'grade_score_90',  array_merge(
		$grade_defaults,
		[
			'score' => 90
		])
	);

I'm aware this could be fe-ractored down, but I don't have the time. So please go wild!