Unable to disable akka logging

[agile]

While running tests from sbt, I start receiving log messages from the Actor after some time:

[INFO] [04/08/2019 14:06:38.335] [sbt-docker-compose-b0243dab-c9d4-4dd8-9467-ef5a05572a14-akka.actor.default-dispatcher-7] [akka://sbt-docker-compose-b0243dab-c9d4-4dd8-9467-ef5a05572a14/user/$b] Message [com.github.ehsanyou.sbt.docker.compose.HealthCheckActor$Protocol$ReturnTo] from Actor[akka://sbt-docker-compose-b0243dab-c9d4-4dd8-9467-ef5a05572a14/user/$b#-1605624210] to Actor[akka://sbt-docker-compose-b0243dab-c9d4-4dd8-9467-ef5a05572a14/user/$b#-1605624210] was not delivered. [2] dead letters encountered. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'.

I have attempted to disable them by adding the following to my application.conf in src/it/resources, src/test/resources, and src/main/resources without any effect.

akka {
  stdout-loglevel = "OFF"
  loglevel = "OFF"
  log-dead-letters = off
  log-dead-letters-during-shutdown = off
}

Is it possible to disable the logging?