diff --git a/src/spectator/core/example_group.cr b/src/spectator/core/example_group.cr
index d5235d3d..cb6cc8da 100644
--- a/src/spectator/core/example_group.cr
+++ b/src/spectator/core/example_group.cr
@@ -37,8 +37,7 @@ module Spectator::Core
 
     def each(& : Item ->) : Nil
       stack = [self] of Item
-      until stack.empty?
-        item = stack.shift
+      while item = stack.shift?
         yield item
         if item.is_a?(ExampleGroup)
           stack.concat(item.children)