Can't use array attributes

[Nekroido]

I've been trying to wrap my head around this problem for some time and make my tests green. And then found this quite nasty and unwelcome "favor" that practically makes it impossible to use array values that are stored as JSON encoded strings:

            // It's possible that the called Faker method returned an array.
            // If that is the case, we'll implode it for the user.

            return is_array($attribute) ? implode(' ', $attribute) : $attribute;