```ruby
require File.expand_path(File.join(File.dirname(__FILE__),'..','test_helper'))
require File.expand_path(File.join(File.dirname(__FILE__),'..','support/active_record'))

class Order < ActiveRecord::Base
  serialize :time, Tod::TimeOfDay
end

describe "TimeOfDay with ActiveRecord Serializable Attribute" do
  describe ".dump" do
    it "sets time of day" do
      Order.create(time: Tod::TimeOfDay.new(9, 30))
    end

    it "sets nil as value" do
      Order.create(time: nil)
    end
  end

  describe ".load" do
    it "loads set time" do
      time_of_day = Tod::TimeOfDay.new(9, 30)
      order = Order.create(time: time_of_day)
      assert_equal order.time, time_of_day
    end

    it "returns nil if time is not set" do
      order = Order.create(time: nil)
      assert_equal order.time, nil
    end
  end
end
```

Improve test to ensure records are successfully created
user
```ruby
require File.expand_path(File.join(File.dirname(__FILE__),'..','test_helper'))
require File.expand_path(File.join(File.dirname(__FILE__),'..','support/active_record'))

class Order < ActiveRecord::Base
  serialize :time, Tod::TimeOfDay
end

describe "TimeOfDay with ActiveRecord Serializable Attribute" do
  describe ".dump" do
    it "sets time of day" do
      Order.create!(time: Tod::TimeOfDay.new(9, 30))
    end

    it "sets nil as value" do
      Order.create!(time: nil)
    end
  end

  describe ".load" do
    it "loads set time" do
      time_of_day = Tod::TimeOfDay.new(9, 30)
      order = Order.create!(time: time_of_day)
      binding.pry
      order.reload
      assert_equal order.time, time_of_day
    end

    it "returns nil if time is not set" do
      order = Order.create!(time: nil)
      order.reload
      assert_equal order.time, nil
    end
  end
end
```
assistant