Make mock source return deferred operations as well

4 jobs for deferred in 6 minutes and 31 seconds (queued for 1 second)
latest
Status Name Job ID Coverage
  Lint
passed lint #71269

00:01:11

 
  Build
passed build #71270

00:01:19

 
  Test
passed lint_history #71272

00:04:00

passed test #71271

00:03:13