diff --git a/test/rb/integration/test_simple_handler.rb b/test/rb/integration/test_simple_handler.rb
index 7dd2fbc..fa52c0f 100644
--- a/test/rb/integration/test_simple_handler.rb
+++ b/test/rb/integration/test_simple_handler.rb
@@ -114,9 +114,9 @@
   end
 
   def test_set
-    val = {1 => true, 2 => true, 3 => true}
-    assert_equal(@client.testSet(val), val)
-    assert_kind_of(Hash, @client.testSet(val))
+    val = Set.new([1, 2, 3])
+    assert_equal(val, @client.testSet(val))
+    assert_kind_of(Set, @client.testSet(val))
   end
 
   def get_struct