diff --git a/main-settings/src/main/scala/sbt/Scope.scala b/main-settings/src/main/scala/sbt/Scope.scala
index 34815405a..0db10399b 100644
--- a/main-settings/src/main/scala/sbt/Scope.scala
+++ b/main-settings/src/main/scala/sbt/Scope.scala
@@ -29,9 +29,10 @@ final case class Scope(project: ScopeAxis[Reference],
   def in(config: ConfigKey): Scope = copy(config = Select(config))
   def in(task: AttributeKey[_]): Scope = copy(task = Select(task))
 
-  override def toString: String = {
-    if (extra == This) s"$project / $config / $task"
-    else s"Scope($project, $config, $task, $extra)"
+  override def toString: String = this match {
+    case Scope(Zero, Zero, Zero, Zero) => "Global"
+    case Scope(_, _, _, This)          => s"$project / $config / $task"
+    case _                             => s"Scope($project, $config, $task, $extra)"
   }
 }
 object Scope {