ExMachina 2.0?

test.exs

defmodule MyApp.Factory do
  def user_factory do
    %User{
      email: "[email protected]",
      name: "Paul"
    }
  end
end

# Makes it easy to organize factories however you want
import MyApp.Factory 
# Could also alias factories easily this way
alias MyApp.UserFactory # and do UserFactory.new |> build
# Imports insert, insert_list, build, build_list, etc.
use ExMachina.Ecto, repo: MyApp.Repo
# Could potentially import other strategies json_encode, json_encode_list
use MyApp.JsonEncodeStrategy

user = user_factory |> build(email: "whatever")
users = user_factory |> build_list
# Old way is: admins = insert_list(:user, admin: true) Slightly shorter, but less flexible
admins = insert_list(:user, admin: true)
admins = user_factory |> insert_list(admin: true)

# Alternatively, you could alias Factory and use different function names like this:
defmodule MyApp.Factory do
  def user do
    %User{
      email: "[email protected]",
      name: "Paul"
    }
  end
end

alias MyApp.Factory

Factory.user |> insert_list(admin: true)

This might be cool because it could be a lot more flexible, maybe easier to understand (have to try it out with people), and could remove some macros. Might be worth trying on some internal projects