diff --git a/ChangeLog b/ChangeLog
index 1bf01348be..01d4e072d7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Apr 15 16:45:14 2008  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
+
+	* test/ruby/test_symbol.rb (TestSymbol#test_to_proc): add tests.
+
 Tue Apr 15 15:38:02 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* misc/ruby-mode.el (ruby-encoding-map): added shift-jis for older
diff --git a/test/ruby/test_symbol.rb b/test/ruby/test_symbol.rb
index f53e615766..ac73dc9137 100644
--- a/test/ruby/test_symbol.rb
+++ b/test/ruby/test_symbol.rb
@@ -77,5 +77,8 @@ class TestSymbol < Test::Unit::TestCase
 
   def test_to_proc
     assert_equal %w(1 2 3), (1..3).map(&:to_s)
+    assert_nothing_raised(ArgumentError) { :object_id.to_proc.call([]) }
+    assert_nothing_raised(ArgumentError) { :object_id.to_proc.call([1]) }
+    assert_nothing_raised(ArgumentError) { :object_id.to_proc.call([1,2]) }
   end
 end