diff --git a/src/main/scala/mesosphere/marathon/state/AppDefinition.scala b/src/main/scala/mesosphere/marathon/state/AppDefinition.scala
index ad433038ef2..71994fb1eb6 100644
--- a/src/main/scala/mesosphere/marathon/state/AppDefinition.scala
+++ b/src/main/scala/mesosphere/marathon/state/AppDefinition.scala
@@ -7,7 +7,7 @@ import com.wix.accord.combinators.GeneralPurposeCombinators
 import com.wix.accord.dsl._
 import mesosphere.marathon.Protos.Constraint
 import mesosphere.marathon.Protos.HealthCheckDefinition.Protocol
-import mesosphere.marathon.state.Container.{ Mesos, MesosAppC, MesosDocker }
+import mesosphere.marathon.state.Container.Docker
 // scalastyle:off
 import mesosphere.marathon.api.serialization.{ ContainerSerializer, EnvVarRefSerializer, PortDefinitionSerializer, ResidencySerializer, SecretsSerializer }
 // scalastyle:on
@@ -684,18 +684,15 @@ object AppDefinition extends GeneralPurposeCombinators {
     (appDef.isResident is false) or (appDef.upgradeStrategy is UpgradeStrategy.validForResidentTasks)
   }
 
-  private val complyWithGpuRules: Validator[AppDefinition] = conditional[AppDefinition](_.gpus > 0) {
-    isTrue[AppDefinition]("GPU resources only work with the Mesos containerizer") { app =>
-      app.container.exists{
-        _ match {
-          case _: MesosDocker => true
-          case _: MesosAppC => true
-          case _: Mesos => true
-          case _ => false
+  private val complyWithGpuRules: Validator[AppDefinition] =
+    conditional[AppDefinition](_.gpus > 0) {
+      isTrue[AppDefinition]("GPU resources only work with the Mesos containerizer") { app =>
+        app.container match {
+          case Some(_: Docker) => false
+          case _ => true
         }
-      }
-    } and featureEnabled(Features.GPU_RESOURCES)
-  }
+      } and featureEnabled(Features.GPU_RESOURCES)
+    }
 
   private val complyWithConstraintRules: Validator[Constraint] = new Validator[Constraint] {
     import Constraint.Operator._
diff --git a/src/test/scala/mesosphere/marathon/api/v2/json/AppDefinitionTest.scala b/src/test/scala/mesosphere/marathon/api/v2/json/AppDefinitionTest.scala
index 11beab598ce..d1ccb9f2cba 100644
--- a/src/test/scala/mesosphere/marathon/api/v2/json/AppDefinitionTest.scala
+++ b/src/test/scala/mesosphere/marathon/api/v2/json/AppDefinitionTest.scala
@@ -430,6 +430,13 @@ class AppDefinitionTest extends MarathonSpec with Matchers {
     )
 
     shouldNotViolate(app, "/", "GPU resources only work with the Mesos containerizer")
+
+    app = correct.copy(
+      gpus = 1,
+      container = None
+    )
+
+    shouldNotViolate(app, "/", "GPU resources only work with the Mesos containerizer")
   }
 
   test("SerializationRoundtrip empty") {
diff --git a/src/test/scala/mesosphere/marathon/core/task/jobs/ExpungeOverdueLostTasksActorTest.scala b/src/test/scala/mesosphere/marathon/core/task/jobs/ExpungeOverdueLostTasksActorTest.scala
index 3bbcefebc28..19b0675c173 100644
--- a/src/test/scala/mesosphere/marathon/core/task/jobs/ExpungeOverdueLostTasksActorTest.scala
+++ b/src/test/scala/mesosphere/marathon/core/task/jobs/ExpungeOverdueLostTasksActorTest.scala
@@ -62,7 +62,7 @@ class ExpungeOverdueLostTasksActorTest extends MarathonSpec with GivenWhenThen w
 
   test("a unreachable task with more then 24 hours with no status update should be killed") {
     Given("one unreachable, one running tasks")
-    val running = MarathonTestHelper.minimalRunning("/running1".toPath, since= Timestamp.apply(0))
+    val running = MarathonTestHelper.minimalRunning("/running1".toPath, since = Timestamp.apply(0))
     val unreachable = MarathonTestHelper.minimalUnreachableTask("/running2".toPath, since = Timestamp.apply(0))
 
     taskTracker.tasksByApp()(any[ExecutionContext]) returns Future.successful(TasksByApp.forTasks(running, unreachable))