diff --git a/main-settings/src/test/scala/sbt/SlashSyntaxSpec.scala b/main-settings/src/test/scala/sbt/SlashSyntaxSpec.scala
index c4b13b27b..b0505ac86 100644
--- a/main-settings/src/test/scala/sbt/SlashSyntaxSpec.scala
+++ b/main-settings/src/test/scala/sbt/SlashSyntaxSpec.scala
@@ -59,7 +59,7 @@ object BuildDSLInstances {
 
   def withScope[K <: Scoped.ScopingSetting[K]](keyGen: Gen[K]): Arbitrary[K] =
     Arbitrary(Gen.frequency(
-      50 -> keyGen,
+      5 -> keyGen,
       1 -> (for (key <- keyGen; scope <- arbitrary[Scope]) yield key in scope)
     ))