diff --git a/test/unit/list_test.rb b/test/unit/list_test.rb
index 0b08737..00f13fe 100644
--- a/test/unit/list_test.rb
+++ b/test/unit/list_test.rb
@@ -46,8 +46,7 @@ def test_each_with_block
 beta
 LIST
 
-    entries = []
-    list.each { |r| entries << r }
+    entries = list.map { |r| r }
 
     assert_equal 2, entries.count
     assert_equal PublicSuffix::Rule.factory("alpha"), entries.first