diff --git a/ChangeLog b/ChangeLog
index 970a7d0fc0..847325e31c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Jul 31 21:31:49 2013  Kouhei Sutou  <kou@cozmixng.org>
+
+	* test/rexml/test_notationdecl_parsetest.rb: Remove setup because it
+	  doesn't share anything with other tests.
+
 Wed Jul 31 21:24:55 2013  Kouhei Sutou  <kou@cozmixng.org>
 
 	* test/rexml/test_attributes_mixin.rb: Remove a needless shebang.
diff --git a/test/rexml/test_notationdecl_parsetest.rb b/test/rexml/test_notationdecl_parsetest.rb
index a1fa9fb67e..547195d47b 100644
--- a/test/rexml/test_notationdecl_parsetest.rb
+++ b/test/rexml/test_notationdecl_parsetest.rb
@@ -2,20 +2,26 @@ require 'test/unit'
 require 'rexml/document'
 
 class TestNotationDecl < Test::Unit::TestCase
-  def setup
-    doc_string = <<-'XMLEND'
-    <!DOCTYPE r SYSTEM "urn:x-henrikmartensson:test" [
+  def test_notation
+    doctype = parse(<<-INTERNAL_SUBSET)
       <!NOTATION n1 PUBLIC "-//HM//NOTATION TEST1//EN" 'urn:x-henrikmartensson.org:test5'>
       <!NOTATION n2 PUBLIC '-//HM//NOTATION TEST2//EN' "urn:x-henrikmartensson.org:test6">
-    ]>
-    <r/>
-    XMLEND
-    @doctype = REXML::Document.new(doc_string).doctype
+    INTERNAL_SUBSET
+    assert(doctype.notation('n1'), "Testing notation n1")
+    assert(doctype.notation('n2'), "Testing notation n2")
   end
 
-  def test_notation
-    assert(@doctype.notation('n1'), "Testing notation n1")
-    assert(@doctype.notation('n2'), "Testing notation n2")
+  private
+  def xml(internal_subset)
+    <<-XML
+<!DOCTYPE r SYSTEM "urn:x-henrikmartensson:test" [
+#{internal_subset}
+]>
+<r/>
+    XML
   end
 
+  def parse(internal_subset)
+    REXML::Document.new(xml(internal_subset)).doctype
+  end
 end