fix test

database/factories/ContentProviderFactory.php

@@ -0,0 +1,14 @@
+<?php
+
+/** @var \Illuminate\Database\Eloquent\Factory $factory */
+
+use App\ContentProvider;
+use Faker\Generator as Faker;
+
+$factory->define(ContentProvider::class, function (Faker $faker) {
+    return [
+        'host' => 'example.com',
+        'robots' => null,
+        'robots_cached_at' => now(),
+    ];
+});