diff --git a/test/ruby/test_dir.rb b/test/ruby/test_dir.rb
index 13a0c31257..a3242a6b3d 100644
--- a/test/ruby/test_dir.rb
+++ b/test/ruby/test_dir.rb
@@ -318,7 +318,7 @@ class TestDir < Test::Unit::TestCase
 
   def test_entries
     assert_entries(Dir.open(@root) {|dir| dir.entries})
-    assert_entries(Dir.entries(@root).to_a)
+    assert_entries(Dir.entries(@root))
     assert_raise(ArgumentError) {Dir.entries(@root+"\0")}
   end