+    def test_compat_urllib_parse_urlencode(self):
+        self.assertEqual(compat_urllib_parse_urlencode({'abc': 'def'}), 'abc=def')
+        self.assertEqual(compat_urllib_parse_urlencode({'abc': b'def'}), 'abc=def')
+        self.assertEqual(compat_urllib_parse_urlencode({b'abc': 'def'}), 'abc=def')
+        self.assertEqual(compat_urllib_parse_urlencode({b'abc': b'def'}), 'abc=def')
+        self.assertEqual(compat_urllib_parse_urlencode([('abc', 'def')]), 'abc=def')
+        self.assertEqual(compat_urllib_parse_urlencode([('abc', b'def')]), 'abc=def')
+        self.assertEqual(compat_urllib_parse_urlencode([(b'abc', 'def')]), 'abc=def')
+        self.assertEqual(compat_urllib_parse_urlencode([(b'abc', b'def')]), 'abc=def')
+
+    def test_compat_shlex_split(self):
+        self.assertEqual(compat_shlex_split('-option "one two"'), ['-option', 'one two'])
+
+    def test_compat_etree_fromstring(self):
+        xml = '''
+            <root foo="bar" spam="中文">
+                <normal>foo</normal>
+                <chinese>中文</chinese>
+                <foo><bar>spam</bar></foo>
+            </root>
+        '''
+        doc = compat_etree_fromstring(xml.encode('utf-8'))
+        self.assertTrue(isinstance(doc.attrib['foo'], compat_str))
+        self.assertTrue(isinstance(doc.attrib['spam'], compat_str))
+        self.assertTrue(isinstance(doc.find('normal').text, compat_str))
+        self.assertTrue(isinstance(doc.find('chinese').text, compat_str))
+        self.assertTrue(isinstance(doc.find('foo/bar').text, compat_str))
+
+    def test_compat_etree_fromstring_doctype(self):
+        xml = '''<?xml version="1.0"?>
+<!DOCTYPE smil PUBLIC "-//W3C//DTD SMIL 2.0//EN" "http://www.w3.org/2001/SMIL20/SMIL20.dtd">
+<smil xmlns="http://www.w3.org/2001/SMIL20/Language"></smil>'''
+        compat_etree_fromstring(xml)
+
+    def test_struct_unpack(self):
+        self.assertEqual(compat_struct_unpack('!B', b'\x00'), (0,))
+
+