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diff --git a/test/src/xml-tests.el b/test/src/xml-tests.el
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+;;; libxml-parse-tests.el --- Test suite for libxml parsing.
+
+;; Copyright (C) 2014-2016 Free Software Foundation, Inc.
+
+;; Author: Ulf Jasper <ulf.jasper@web.de>
+;; Keywords:       internal
+;; Human-Keywords: internal
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;; Code:
+
+(require 'ert)
+
+(defvar libxml-tests--data-comments-preserved
+  `(;; simple case
+    ("<?xml version=\"1.0\"?><foo baz=\"true\">bar</foo>"
+     . (foo ((baz . "true")) "bar"))
+    ;; toplevel comments -- first document child must not get lost
+    (,(concat "<?xml version=\"1.0\"?><foo>bar</foo><!--comment-1-->"
+	      "<!--comment-2-->")
+     . (top nil (foo nil "bar") (comment nil "comment-1")
+            (comment nil "comment-2")))
+    (,(concat "<?xml version=\"1.0\"?><!--comment-a--><foo a=\"b\">"
+	      "<bar>blub</bar></foo><!--comment-b--><!--comment-c-->")
+     . (top nil (comment nil "comment-a") (foo ((a . "b")) (bar nil "blub"))
+            (comment nil "comment-b") (comment nil "comment-c"))))
+  "Alist of XML strings and their expected parse trees for preserved comments.")
+
+(defvar libxml-tests--data-comments-discarded
+  `(;; simple case
+    ("<?xml version=\"1.0\"?><foo baz=\"true\">bar</foo>"
+     . (foo ((baz . "true")) "bar"))
+    ;; toplevel comments -- first document child must not get lost
+    (,(concat "<?xml version=\"1.0\"?><foo>bar</foo><!--comment-1-->"
+	      "<!--comment-2-->")
+     . (foo nil "bar"))
+    (,(concat "<?xml version=\"1.0\"?><!--comment-a--><foo a=\"b\">"
+	      "<bar>blub</bar></foo><!--comment-b--><!--comment-c-->")
+     . (foo ((a . "b")) (bar nil "blub"))))
+  "Alist of XML strings and their expected parse trees for discarded comments.")
+
+
+(ert-deftest libxml-tests ()
+  "Test libxml."
+  (when (fboundp 'libxml-parse-xml-region)
+    (with-temp-buffer
+      (dolist (test libxml-tests--data-comments-preserved)
+        (erase-buffer)
+        (insert (car test))
+        (should (equal (cdr test)
+                       (libxml-parse-xml-region (point-min) (point-max)))))
+      (dolist (test libxml-tests--data-comments-discarded)
+        (erase-buffer)
+        (insert (car test))
+        (should (equal (cdr test)
+                       (libxml-parse-xml-region (point-min) (point-max) nil t)))))))
+
+;;; libxml-tests.el ends here