diff --git a/ChangeLog b/ChangeLog
index 9f2c8e6bcc..27c621a8b3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -4,6 +4,9 @@ Thu Mar 13 21:00:50 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
 	  which shares internal pointer.  splice modifies the receiver
 	  right after subseq.  [ruby-dev:34005]
 
+	* bootstraptest/test_struct.rb: some test moved from test to shut
+	  warning up.
+
 Thu Mar 13 19:42:43 2008  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* {bcc,win}32/Makefile.sub (config.h): define uint32_t.
diff --git a/bootstraptest/test_struct.rb b/bootstraptest/test_struct.rb
new file mode 100644
index 0000000000..a65964d5f9
--- /dev/null
+++ b/bootstraptest/test_struct.rb
@@ -0,0 +1,5 @@
+assert_equal 'Struct::Foo', %q{
+  Struct.instance_eval { const_set(:Foo, nil) }
+  Struct.new("Foo")
+  Struct::Foo
+}
diff --git a/test/ruby/test_struct.rb b/test/ruby/test_struct.rb
index 270d537473..cbb0c1405e 100644
--- a/test/ruby/test_struct.rb
+++ b/test/ruby/test_struct.rb
@@ -91,7 +91,6 @@ class TestStruct < Test::Unit::TestCase
   end
 
   def test_struct_new
-    Struct.instance_eval { const_set(:Foo, nil) }
     assert_raise(NameError) { Struct.new("foo") }
     assert_nothing_raised { Struct.new("Foo") }
     Struct.instance_eval { remove_const(:Foo) }