diff --git a/Lib/test/test_datetime.py b/Lib/test/test_datetime.py
index 70b00a4..6b4c667 100644
--- a/Lib/test/test_datetime.py
+++ b/Lib/test/test_datetime.py
@@ -1767,6 +1767,11 @@
         self.assertEqual(t.isoformat(), "00:00:00.100000")
         self.assertEqual(t.isoformat(), str(t))
 
+    def test_1653736(self):
+        # verify it doesn't accept extra keyword arguments
+        t = self.theclass(second=1)
+        self.assertRaises(TypeError, t.isoformat, foo=3)
+
     def test_strftime(self):
         t = self.theclass(1, 2, 3, 4)
         self.assertEqual(t.strftime('%H %M %S'), "01 02 03")
diff --git a/Lib/test/test_defaultdict.py b/Lib/test/test_defaultdict.py
index 03900de..c8ae2be 100644
--- a/Lib/test/test_defaultdict.py
+++ b/Lib/test/test_defaultdict.py
@@ -47,6 +47,7 @@
             self.assertEqual(err.args, (15,))
         else:
             self.fail("d2[15] didn't raise KeyError")
+        self.assertRaises(TypeError, defaultdict, 1)
 
     def test_missing(self):
         d1 = defaultdict()
@@ -60,10 +61,10 @@
         self.assertEqual(repr(d1), "defaultdict(None, {})")
         d1[11] = 41
         self.assertEqual(repr(d1), "defaultdict(None, {11: 41})")
-        d2 = defaultdict(0)
-        self.assertEqual(d2.default_factory, 0)
+        d2 = defaultdict(int)
+        self.assertEqual(d2.default_factory, int)
         d2[12] = 42
-        self.assertEqual(repr(d2), "defaultdict(0, {12: 42})")
+        self.assertEqual(repr(d2), "defaultdict(<type 'int'>, {12: 42})")
         def foo(): return 43
         d3 = defaultdict(foo)
         self.assert_(d3.default_factory is foo)
diff --git a/Lib/test/test_descr.py b/Lib/test/test_descr.py
index d369cf6..e8db29e 100644
--- a/Lib/test/test_descr.py
+++ b/Lib/test/test_descr.py
@@ -2093,7 +2093,7 @@
         __slots__ = ['prec']
         def __init__(self, value=0.0, prec=12):
             self.prec = int(prec)
-            float.__init__(value)
+            float.__init__(self, value)
         def __repr__(self):
             return "%.*g" % (self.prec, self)
     vereq(repr(precfloat(1.1)), "1.1")
diff --git a/Lib/test/test_dict.py b/Lib/test/test_dict.py
index fb4483a..679181f 100644
--- a/Lib/test/test_dict.py
+++ b/Lib/test/test_dict.py
@@ -182,6 +182,14 @@
 
         self.assertRaises(ValueError, {}.update, [(1, 2, 3)])
 
+        # SF #1615701:  make d.update(m) honor __getitem__() and keys() in dict subclasses
+        class KeyUpperDict(dict):
+            def __getitem__(self, key):
+                return key.upper()
+        d.clear()
+        d.update(KeyUpperDict.fromkeys('abc'))
+        self.assertEqual(d, {'a':'A', 'b':'B', 'c':'C'})
+
     def test_fromkeys(self):
         self.assertEqual(dict.fromkeys('abc'), {'a':None, 'b':None, 'c':None})
         d = {}
diff --git a/Lib/test/test_gzip.py b/Lib/test/test_gzip.py
index fbdbc30..124a469 100644
--- a/Lib/test/test_gzip.py
+++ b/Lib/test/test_gzip.py
@@ -153,6 +153,13 @@
         self.assertEqual(f.myfileobj.mode, 'rb')
         f.close()
 
+    def test_1647484(self):
+        for mode in ('wb', 'rb'):
+            f = gzip.GzipFile(self.filename, mode)
+            self.assert_(hasattr(f, "name"))
+            self.assertEqual(f.name, self.filename)
+            f.close()
+
 def test_main(verbose=None):
     test_support.run_unittest(TestGzip)
 
diff --git a/Lib/test/test_heapq.py b/Lib/test/test_heapq.py
index 934f7b6..156c835 100644
--- a/Lib/test/test_heapq.py
+++ b/Lib/test/test_heapq.py
@@ -1,6 +1,6 @@
 """Unittests for heapq."""
 
-from heapq import heappush, heappop, heapify, heapreplace, nlargest, nsmallest
+from heapq import heappush, heappop, heapify, heapreplace, merge, nlargest, nsmallest
 import random
 import unittest
 from test import test_support
@@ -103,6 +103,29 @@
             heap_sorted = [heappop(heap) for i in range(size)]
             self.assertEqual(heap_sorted, sorted(data))
 
+    def test_merge(self):
+        inputs = []
+        for i in xrange(random.randrange(5)):
+            row = sorted(random.randrange(1000) for j in range(random.randrange(10)))
+            inputs.append(row)
+        self.assertEqual(sorted(chain(*inputs)), list(merge(*inputs)))
+        self.assertEqual(list(merge()), [])
+
+    def test_merge_stability(self):
+        class Int(int):
+            pass
+        inputs = [[], [], [], []]
+        for i in range(20000):
+            stream = random.randrange(4)
+            x = random.randrange(500)
+            obj = Int(x)
+            obj.pair = (x, stream)
+            inputs[stream].append(obj)
+        for stream in inputs:
+            stream.sort()
+        result = [i.pair for i in merge(*inputs)]
+        self.assertEqual(result, sorted(result))
+
     def test_nsmallest(self):
         data = [(random.randrange(2000), i) for i in range(1000)]
         for f in (None, lambda x:  x[0] * 547 % 2000):
diff --git a/Lib/test/test_itertools.py b/Lib/test/test_itertools.py
index ac30495..bbebbd9 100644
--- a/Lib/test/test_itertools.py
+++ b/Lib/test/test_itertools.py
@@ -55,8 +55,7 @@
         self.assertEqual(take(2, lzip('abc',count(3))), [('a', 3), ('b', 4)])
         self.assertRaises(TypeError, count, 2, 3)
         self.assertRaises(TypeError, count, 'a')
-        c = count(sys.maxint-2)   # verify that rollover doesn't crash
-        c.next(); c.next(); c.next(); c.next(); c.next()
+        self.assertRaises(OverflowError, list, islice(count(sys.maxint-5), 10))
         c = count(3)
         self.assertEqual(repr(c), 'count(3)')
         c.next()
@@ -203,6 +202,51 @@
         ids = map(id, list(izip('abc', 'def')))
         self.assertEqual(len(dict.fromkeys(ids)), len(ids))
 
+    def test_iziplongest(self):
+        for args in [
+                ['abc', range(6)],
+                [range(6), 'abc'],
+                [range(1000), range(2000,2100), range(3000,3050)],
+                [range(1000), range(0), range(3000,3050), range(1200), range(1500)],
+                [range(1000), range(0), range(3000,3050), range(1200), range(1500), range(0)],
+            ]:
+            target = map(None, *args)
+            self.assertEqual(list(izip_longest(*args)), target)
+            self.assertEqual(list(izip_longest(*args, **{})), target)
+            target = [tuple((e is None and 'X' or e) for e in t) for t in target]   # Replace None fills with 'X'
+            self.assertEqual(list(izip_longest(*args, **dict(fillvalue='X'))), target)
+        
+        self.assertEqual(take(3,izip_longest('abcdef', count())), list(zip('abcdef', range(3)))) # take 3 from infinite input
+
+        self.assertEqual(list(izip_longest()), list(zip()))
+        self.assertEqual(list(izip_longest([])), list(zip([])))
+        self.assertEqual(list(izip_longest('abcdef')), list(zip('abcdef')))
+    
+        self.assertEqual(list(izip_longest('abc', 'defg', **{})), map(None, 'abc', 'defg')) # empty keyword dict
+        self.assertRaises(TypeError, izip_longest, 3)
+        self.assertRaises(TypeError, izip_longest, range(3), 3)
+
+        for stmt in [
+            "izip_longest('abc', fv=1)",
+            "izip_longest('abc', fillvalue=1, bogus_keyword=None)",            
+        ]:
+            try:
+                eval(stmt, globals(), locals())
+            except TypeError:
+                pass
+            else:
+                self.fail('Did not raise Type in:  ' + stmt)
+        
+        # Check tuple re-use (implementation detail)
+        self.assertEqual([tuple(list(pair)) for pair in izip_longest('abc', 'def')],
+                         list(zip('abc', 'def')))
+        self.assertEqual([pair for pair in izip_longest('abc', 'def')],
+                         list(zip('abc', 'def')))
+        ids = map(id, izip_longest('abc', 'def'))
+        self.assertEqual(min(ids), max(ids))
+        ids = map(id, list(izip_longest('abc', 'def')))
+        self.assertEqual(len(dict.fromkeys(ids)), len(ids))
+
     def test_repeat(self):
         self.assertEqual(lzip(xrange(3),repeat('a')),
                          [(0, 'a'), (1, 'a'), (2, 'a')])
@@ -616,6 +660,15 @@
             self.assertRaises(TypeError, izip, N(s))
             self.assertRaises(ZeroDivisionError, list, izip(E(s)))
 
+    def test_iziplongest(self):
+        for s in ("123", "", range(1000), ('do', 1.2), xrange(2000,2200,5)):
+            for g in (G, I, Ig, S, L, R):
+                self.assertEqual(list(izip_longest(g(s))), list(zip(g(s))))
+                self.assertEqual(list(izip_longest(g(s), g(s))), list(zip(g(s), g(s))))
+            self.assertRaises(TypeError, izip_longest, X(s))
+            self.assertRaises(TypeError, izip_longest, N(s))
+            self.assertRaises(ZeroDivisionError, list, izip_longest(E(s)))
+
     def test_imap(self):
         for s in (range(10), range(0), range(100), (7,11), xrange(20,50,5)):
             for g in (G, I, Ig, S, L, R):
diff --git a/Lib/test/test_operator.py b/Lib/test/test_operator.py
index 2183508..e05d054 100644
--- a/Lib/test/test_operator.py
+++ b/Lib/test/test_operator.py
@@ -210,6 +210,8 @@
         self.failUnless(operator.isSequenceType(xrange(10)))
         self.failUnless(operator.isSequenceType('yeahbuddy'))
         self.failIf(operator.isSequenceType(3))
+        class Dict(dict): pass
+        self.failIf(operator.isSequenceType(Dict()))
 
     def test_lshift(self):
         self.failUnlessRaises(TypeError, operator.lshift)
diff --git a/Lib/test/test_posix.py b/Lib/test/test_posix.py
index f98c723..7207de5 100644
--- a/Lib/test/test_posix.py
+++ b/Lib/test/test_posix.py
@@ -192,6 +192,18 @@
             posix.utime(test_support.TESTFN, (int(now), int(now)))
             posix.utime(test_support.TESTFN, (now, now))
 
+    def test_chflags(self):
+        if hasattr(posix, 'chflags'):
+            st = os.stat(test_support.TESTFN)
+            if hasattr(st, 'st_flags'):
+                posix.chflags(test_support.TESTFN, st.st_flags)
+
+    def test_lchflags(self):
+        if hasattr(posix, 'lchflags'):
+            st = os.stat(test_support.TESTFN)
+            if hasattr(st, 'st_flags'):
+                posix.lchflags(test_support.TESTFN, st.st_flags)
+
 def test_main():
     test_support.run_unittest(PosixTester)
 
diff --git a/Lib/test/test_sax.py b/Lib/test/test_sax.py
index fbe742d..5b071dd 100644
--- a/Lib/test/test_sax.py
+++ b/Lib/test/test_sax.py
@@ -216,7 +216,44 @@
            ('<ns1:doc xmlns:ns1="%s"><udoc></udoc></ns1:doc>' %
                                          ns_uri)
 
-# ===== XMLFilterBase
+def test_1463026_1():
+    result = StringIO()
+    gen = XMLGenerator(result)
+
+    gen.startDocument()
+    gen.startElementNS((None, 'a'), 'a', {(None, 'b'):'c'})
+    gen.endElementNS((None, 'a'), 'a')
+    gen.endDocument()
+
+    return result.getvalue() == start+'<a b="c"></a>'
+
+def test_1463026_2():
+    result = StringIO()
+    gen = XMLGenerator(result)
+
+    gen.startDocument()
+    gen.startPrefixMapping(None, 'qux')
+    gen.startElementNS(('qux', 'a'), 'a', {})
+    gen.endElementNS(('qux', 'a'), 'a')
+    gen.endPrefixMapping(None)
+    gen.endDocument()
+
+    return result.getvalue() == start+'<a xmlns="qux"></a>'
+
+def test_1463026_3():
+    result = StringIO()
+    gen = XMLGenerator(result)
+
+    gen.startDocument()
+    gen.startPrefixMapping('my', 'qux')
+    gen.startElementNS(('qux', 'a'), 'a', {(None, 'b'):'c'})
+    gen.endElementNS(('qux', 'a'), 'a')
+    gen.endPrefixMapping('my')
+    gen.endDocument()
+
+    return result.getvalue() == start+'<my:a xmlns:my="qux" b="c"></my:a>'
+    
+# ===== Xmlfilterbase
 
 def test_filter_basic():
     result = StringIO()
diff --git a/Lib/test/test_set.py b/Lib/test/test_set.py
index 2a791e4..8a43109 100644
--- a/Lib/test/test_set.py
+++ b/Lib/test/test_set.py
@@ -26,6 +26,14 @@
     def __repr__(self):
         return repr(self.value)
 
+class HashCountingInt(int):
+    'int-like object that counts the number of times __hash__ is called'
+    def __init__(self, *args):
+        self.hash_count = 0
+    def __hash__(self):
+        self.hash_count += 1
+        return int.__hash__(self)
+
 class TestJointOps(unittest.TestCase):
     # Tests common to both set and frozenset
 
@@ -273,6 +281,18 @@
             fo.close()
             os.remove(test_support.TESTFN)
 
+    def test_do_not_rehash_dict_keys(self):
+        n = 10
+        d = dict.fromkeys(map(HashCountingInt, xrange(n)))
+        self.assertEqual(sum(elem.hash_count for elem in d), n)
+        s = self.thetype(d)
+        self.assertEqual(sum(elem.hash_count for elem in d), n)
+        s.difference(d)
+        self.assertEqual(sum(elem.hash_count for elem in d), n)    
+        if hasattr(s, 'symmetric_difference_update'):
+            s.symmetric_difference_update(d)
+        self.assertEqual(sum(elem.hash_count for elem in d), n)      
+
 class TestSet(TestJointOps):
     thetype = set
 
diff --git a/Lib/test/test_tarfile.py b/Lib/test/test_tarfile.py
index 9ae913d..e9bf497 100644
--- a/Lib/test/test_tarfile.py
+++ b/Lib/test/test_tarfile.py
@@ -305,6 +305,61 @@
         self.assertEqual(self.dst.getnames(), [], "added the archive to itself")
 
 
+class AppendTest(unittest.TestCase):
+    # Test append mode (cp. patch #1652681).
+
+    def setUp(self):
+        self.tarname = tmpname()
+        if os.path.exists(self.tarname):
+            os.remove(self.tarname)
+
+    def _add_testfile(self, fileobj=None):
+        tar = tarfile.open(self.tarname, "a", fileobj=fileobj)
+        tar.addfile(tarfile.TarInfo("bar"))
+        tar.close()
+
+    def _create_testtar(self):
+        src = tarfile.open(tarname())
+        t = src.getmember("0-REGTYPE")
+        t.name = "foo"
+        f = src.extractfile(t)
+        tar = tarfile.open(self.tarname, "w")
+        tar.addfile(t, f)
+        tar.close()
+
+    def _test(self, names=["bar"], fileobj=None):
+        tar = tarfile.open(self.tarname, fileobj=fileobj)
+        self.assert_(tar.getnames() == names)
+
+    def test_non_existing(self):
+        self._add_testfile()
+        self._test()
+
+    def test_empty(self):
+        open(self.tarname, "wb").close()
+        self._add_testfile()
+        self._test()
+
+    def test_empty_fileobj(self):
+        fobj = StringIO.StringIO()
+        self._add_testfile(fobj)
+        fobj.seek(0)
+        self._test(fileobj=fobj)
+
+    def test_fileobj(self):
+        self._create_testtar()
+        data = open(self.tarname, "rb").read()
+        fobj = StringIO.StringIO(data)
+        self._add_testfile(fobj)
+        fobj.seek(0)
+        self._test(names=["foo", "bar"], fileobj=fobj)
+
+    def test_existing(self):
+        self._create_testtar()
+        self._add_testfile()
+        self._test(names=["foo", "bar"])
+
+
 class Write100Test(BaseTest):
     # The name field in a tar header stores strings of at most 100 chars.
     # If a string is shorter than 100 chars it has to be padded with '\0',
@@ -711,6 +766,7 @@
         ReadAsteriskTest,
         ReadStreamAsteriskTest,
         WriteTest,
+        AppendTest,
         Write100Test,
         WriteSize0Test,
         WriteStreamTest,
diff --git a/Lib/test/test_zipfile.py b/Lib/test/test_zipfile.py
index 56c4939..d6f5534 100644
--- a/Lib/test/test_zipfile.py
+++ b/Lib/test/test_zipfile.py
@@ -307,6 +307,28 @@
 
 
 class OtherTests(unittest.TestCase):
+    def testCreateNonExistentFileForAppend(self):
+        if os.path.exists(TESTFN):
+            os.unlink(TESTFN)
+            
+        filename = 'testfile.txt'
+        content = 'hello, world. this is some content.'
+        
+        try:
+            zf = zipfile.ZipFile(TESTFN, 'a')
+            zf.writestr(filename, content)
+            zf.close()
+        except IOError:
+            self.fail('Could not append data to a non-existent zip file.')
+
+        self.assert_(os.path.exists(TESTFN))
+
+        zf = zipfile.ZipFile(TESTFN, 'r')
+        self.assertEqual(zf.read(filename), content)
+        zf.close()
+        
+        os.unlink(TESTFN)
+        
     def testCloseErroneousFile(self):
         # This test checks that the ZipFile constructor closes the file object
         # it opens if there's an error in the file.  If it doesn't, the traceback
@@ -349,8 +371,49 @@
         # and report that the first file in the archive was corrupt.
         self.assertRaises(RuntimeError, zipf.testzip)
 
+
+class DecryptionTests(unittest.TestCase):
+    # This test checks that ZIP decryption works. Since the library does not
+    # support encryption at the moment, we use a pre-generated encrypted
+    # ZIP file
+
+    data = (
+    'PK\x03\x04\x14\x00\x01\x00\x00\x00n\x92i.#y\xef?&\x00\x00\x00\x1a\x00'
+    '\x00\x00\x08\x00\x00\x00test.txt\xfa\x10\xa0gly|\xfa-\xc5\xc0=\xf9y'
+    '\x18\xe0\xa8r\xb3Z}Lg\xbc\xae\xf9|\x9b\x19\xe4\x8b\xba\xbb)\x8c\xb0\xdbl'
+    'PK\x01\x02\x14\x00\x14\x00\x01\x00\x00\x00n\x92i.#y\xef?&\x00\x00\x00'
+    '\x1a\x00\x00\x00\x08\x00\x00\x00\x00\x00\x00\x00\x01\x00 \x00\xb6\x81'
+    '\x00\x00\x00\x00test.txtPK\x05\x06\x00\x00\x00\x00\x01\x00\x01\x006\x00'
+    '\x00\x00L\x00\x00\x00\x00\x00' )
+
+    plain = 'zipfile.py encryption test'
+
+    def setUp(self):
+        fp = open(TESTFN, "wb")
+        fp.write(self.data)
+        fp.close()
+        self.zip = zipfile.ZipFile(TESTFN, "r")
+
+    def tearDown(self):
+        self.zip.close()
+        os.unlink(TESTFN)
+
+    def testNoPassword(self):
+        # Reading the encrypted file without password
+        # must generate a RunTime exception
+        self.assertRaises(RuntimeError, self.zip.read, "test.txt")
+
+    def testBadPassword(self):
+        self.zip.setpassword("perl")
+        self.assertRaises(RuntimeError, self.zip.read, "test.txt")
+            
+    def testGoodPassword(self):
+        self.zip.setpassword("python")
+        self.assertEquals(self.zip.read("test.txt"), self.plain)
+
 def test_main():
-    run_unittest(TestsWithSourceFile, TestZip64InSmallFiles, OtherTests, PyZipFileTests)
+    run_unittest(TestsWithSourceFile, TestZip64InSmallFiles, OtherTests, 
+                 PyZipFileTests, DecryptionTests)
     #run_unittest(TestZip64InSmallFiles)
 
 if __name__ == "__main__":