Index: Lib/test/test_minidom.py
===================================================================
--- Lib/test/test_minidom.py	(revision 72551)
+++ Lib/test/test_minidom.py	(working copy)
@@ -1480,6 +1480,28 @@
         doc.appendChild(doc.createComment("foo--bar"))
         self.assertRaises(ValueError, doc.toxml)
 
+    def testMultilineAttrRoundtrip(self):
+        value = "multiline\nvalue"
+        test = "testMultilineAttrRoundtrip"
+
+        dom = Document()
+        child = dom.appendChild(dom.createElement("abc"))
+
+        child.setAttribute("def", value)
+        self.confirm(child.getAttribute("def") == value)
+        self.confirm(child.attributes["def"].value == value)
+
+        parsed = parseString(dom.toxml())
+        pchild = parsed.firstChild
+
+        self.confirm(pchild.getAttribute("def") == value, test)
+        self.confirm(pchild.attributes["def"].value == value, test)
+        self.confirm(child.toxml() == pchild.toxml(), test)
+        self.confirm(dom.toxml() == parsed.toxml(), test)
+
+        dom.unlink()
+        parsed.unlink()
+
 def test_main():
     run_unittest(MinidomTest)