Testing ActiveJobs Workers

I am using rails5 and activejobs and I am trying to enqueue a job after a specific time(2 hours). Im currently testing the Background jobs and I am using Timecop to change the time 2 hours later. How to make sure that workers are running in the test environment? This is the code that calls the job:

def send_missed_session_email
    message = self
    SendingMissedMessageJob.set(queue: :message_queue, wait_until: message.created_at + 2.hours).perform_later(message)
  end

This is the job's code

def perform(message)
      @recepient = message.recepient
      @sender = message.sender
      @content = message.message
      UserMailer.send_notify_message_email(@recepient,@sender, @content).deliver_later
  end

This is the test code:

it "sends send_notify_message_email email after 5 hrs from the message creation" do
        Timecop.travel(message.created_at + 5.hours) 
        perform_enqueued_jobs do 
        end
        expect(ActionMailer::Base.deliveries.count).to eq(1)        
    end

Failures:

1) SendingMissedMessageJob sends send_notify_message_email email after 5 hrs from the message creation Failure/Error: expect(ActionMailer::Base.deliveries.count).to eq(1)

   expected: 1
        got: 0

   (compared using ==)