diff --git a/spec/concurrent/set_spec.rb b/spec/concurrent/set_spec.rb
index ba4e6ffa0..670ca0803 100644
--- a/spec/concurrent/set_spec.rb
+++ b/spec/concurrent/set_spec.rb
@@ -7,9 +7,9 @@ module Concurrent
       (1..THREADS).map do |i|
         Thread.new do
            1000.times do |j|
-            set << i * 1000 + j
-            set.each { |x| x * 2 }
-            set.delete(i * 1000 + j)
+            set << i 
+            set.empty?
+            set.delete(i)
            end
         end
       end.map(&:join)