Rails ActiveJob not using correct adapter when specified in a custom initialiser

Question

I'm attempting to get ActiveJob to use the sucker-punch adapter with the below code in config/initilizers/sucker_punch.rb

Rails.application.configure do
 config.active_job.queue_adapter = :sucker_punch
end 

With this code in place ActiveJob still uses the inline adapter. If I move this code into config/application.rb it works no problem.

I can log from my custom initialiser so I know it is being called.

Versions:

• Rudy 2.2.1
• Rails 4.2.1
• Sucker Punch 1.4.0

Could someone please help.

Thanks!