diff --git a/main/src/main/scala/sbt/internal/DefaultBackgroundJobService.scala b/main/src/main/scala/sbt/internal/DefaultBackgroundJobService.scala
index be912e365..92511ca75 100644
--- a/main/src/main/scala/sbt/internal/DefaultBackgroundJobService.scala
+++ b/main/src/main/scala/sbt/internal/DefaultBackgroundJobService.scala
@@ -209,7 +209,6 @@ private[sbt] abstract class AbstractBackgroundJobService extends BackgroundJobSe
     }
     val xs = (products.toVector map { syncTo(workingDirectory / "target") }) ++
       ((full diff products) map { syncTo(serviceTempDir / "target") })
-    Thread.sleep(100)
     xs
   }