diff --git a/Lib/idlelib/PyShell.py b/Lib/idlelib/PyShell.py
index ef82d81b7b7..e906292e17d 100644
--- a/Lib/idlelib/PyShell.py
+++ b/Lib/idlelib/PyShell.py
@@ -347,7 +347,7 @@ class ModifiedInterpreter(InteractiveInterpreter):
     rpcpid = None
 
     def spawn_subprocess(self):
-        if self.subprocess_arglist == None:
+        if self.subprocess_arglist is None:
             self.subprocess_arglist = self.build_subprocess_arglist()
         args = self.subprocess_arglist
         self.rpcpid = os.spawnv(os.P_NOWAIT, sys.executable, args)
diff --git a/Lib/site.py b/Lib/site.py
index 14fa5703b45..3ecc5684cdb 100644
--- a/Lib/site.py
+++ b/Lib/site.py
@@ -112,7 +112,7 @@ def addbuilddir():
     s = "build/lib.%s-%.3s" % (get_platform(), sys.version)
     if hasattr(sys, 'gettotalrefcount'):
         s += '-pydebug'
-    s = os.path.join(os.path.dirname(sys.path[-1]), s)
+    s = os.path.join(os.path.dirname(sys.path.pop()), s)
     sys.path.append(s)
 
 
diff --git a/Lib/test/regrtest.py b/Lib/test/regrtest.py
index d0cd8552b97..c37b0bf37d7 100755
--- a/Lib/test/regrtest.py
+++ b/Lib/test/regrtest.py
@@ -612,12 +612,6 @@ def main(tests=None, testdir=None, verbose=0, quiet=False,
                 if module not in save_modules and module.startswith("test."):
                     support.unload(module)
 
-    # The lists won't be sorted if running with -r
-    good.sort()
-    bad.sort()
-    skipped.sort()
-    environment_changed.sort()
-
     if good and not quiet:
         if not bad and not skipped and len(good) > 1:
             print("All", end=' ')
@@ -1128,7 +1122,8 @@ def printlist(x, width=70, indent=4):
 
     from textwrap import fill
     blanks = ' ' * indent
-    print(fill(' '.join(str(elt) for elt in x), width,
+    # Print the sorted list: 'x' may be a '--random' list or a set()
+    print(fill(' '.join(str(elt) for elt in sorted(x)), width,
                initial_indent=blanks, subsequent_indent=blanks))
 
 # Map sys.platform to a string containing the basenames of tests
diff --git a/Lib/test/test_httpservers.py b/Lib/test/test_httpservers.py
index 6cf5e3e781b..71ec2969d7b 100644
--- a/Lib/test/test_httpservers.py
+++ b/Lib/test/test_httpservers.py
@@ -298,14 +298,22 @@ class CGIHTTPServerTestCase(BaseTestCase):
         self.cgi_dir = os.path.join(self.parent_dir, 'cgi-bin')
         os.mkdir(self.cgi_dir)
 
+        # The shebang line should be pure ASCII: use symlink if possible.
+        # See issue #7668.
+        if hasattr(os, 'symlink'):
+            self.pythonexe = os.path.join(self.parent_dir, 'python')
+            os.symlink(sys.executable, self.pythonexe)
+        else:
+            self.pythonexe = sys.executable
+
         self.file1_path = os.path.join(self.cgi_dir, 'file1.py')
         with open(self.file1_path, 'w') as file1:
-            file1.write(cgi_file1 % sys.executable)
+            file1.write(cgi_file1 % self.pythonexe)
         os.chmod(self.file1_path, 0o777)
 
         self.file2_path = os.path.join(self.cgi_dir, 'file2.py')
         with open(self.file2_path, 'w') as file2:
-            file2.write(cgi_file2 % sys.executable)
+            file2.write(cgi_file2 % self.pythonexe)
         os.chmod(self.file2_path, 0o777)
 
         self.cwd = os.getcwd()
@@ -314,6 +322,8 @@ class CGIHTTPServerTestCase(BaseTestCase):
     def tearDown(self):
         try:
             os.chdir(self.cwd)
+            if self.pythonexe != sys.executable:
+                os.remove(self.pythonexe)
             os.remove(self.file1_path)
             os.remove(self.file2_path)
             os.rmdir(self.cgi_dir)
diff --git a/Lib/test/test_multiprocessing.py b/Lib/test/test_multiprocessing.py
index 035860bd961..6d12d12cd57 100644
--- a/Lib/test/test_multiprocessing.py
+++ b/Lib/test/test_multiprocessing.py
@@ -63,6 +63,16 @@ HAVE_GETVALUE = not getattr(_multiprocessing,
 
 WIN32 = (sys.platform == "win32")
 
+#
+# Some tests require ctypes
+#
+
+try:
+    from ctypes import Structure, Value, copy, c_int, c_double
+except ImportError:
+    Structure = object
+    c_int = c_double = None
+
 #
 # Creates a wrapper for a function which records the time it takes to finish
 #
@@ -506,7 +516,7 @@ class _TestQueue(BaseTestCase):
         queue = self.JoinableQueue()
 
         if sys.version_info < (2, 5) and not hasattr(queue, 'task_done'):
-            return
+            self.skipTest("requires 'queue.task_done()' method")
 
         workers = [self.Process(target=self._test_task_done, args=(queue,))
                    for i in range(4)]
@@ -783,6 +793,8 @@ class _TestEvent(BaseTestCase):
 
 class _TestValue(BaseTestCase):
 
+    ALLOWED_TYPES = ('processes',)
+
     codes_values = [
         ('i', 4343, 24234),
         ('d', 3.625, -4.25),
@@ -795,10 +807,8 @@ class _TestValue(BaseTestCase):
             sv.value = cv[2]
 
 
+    @unittest.skipIf(c_int is None, "requires _ctypes")
     def test_value(self, raw=False):
-        if self.TYPE != 'processes':
-            return
-
         if raw:
             values = [self.RawValue(code, value)
                       for code, value, _ in self.codes_values]
@@ -816,13 +826,12 @@ class _TestValue(BaseTestCase):
         for sv, cv in zip(values, self.codes_values):
             self.assertEqual(sv.value, cv[2])
 
+    @unittest.skipIf(c_int is None, "requires _ctypes")
     def test_rawvalue(self):
         self.test_value(raw=True)
 
+    @unittest.skipIf(c_int is None, "requires _ctypes")
     def test_getobj_getlock(self):
-        if self.TYPE != 'processes':
-            return
-
         val1 = self.Value('i', 5)
         lock1 = val1.get_lock()
         obj1 = val1.get_obj()
@@ -850,14 +859,14 @@ class _TestValue(BaseTestCase):
 
 class _TestArray(BaseTestCase):
 
+    ALLOWED_TYPES = ('processes',)
+
     def f(self, seq):
         for i in range(1, len(seq)):
             seq[i] += seq[i-1]
 
+    @unittest.skipIf(c_int is None, "requires _ctypes")
     def test_array(self, raw=False):
-        if self.TYPE != 'processes':
-            return
-
         seq = [680, 626, 934, 821, 150, 233, 548, 982, 714, 831]
         if raw:
             arr = self.RawArray('i', seq)
@@ -880,13 +889,12 @@ class _TestArray(BaseTestCase):
 
         self.assertEqual(list(arr[:]), seq)
 
+    @unittest.skipIf(c_int is None, "requires _ctypes")
     def test_rawarray(self):
         self.test_array(raw=True)
 
+    @unittest.skipIf(c_int is None, "requires _ctypes")
     def test_getobj_getlock_obj(self):
-        if self.TYPE != 'processes':
-            return
-
         arr1 = self.Array('i', list(range(10)))
         lock1 = arr1.get_lock()
         obj1 = arr1.get_obj()
@@ -1570,12 +1578,6 @@ class _TestHeap(BaseTestCase):
 #
 #
 
-try:
-    from ctypes import Structure, Value, copy, c_int, c_double
-except ImportError:
-    Structure = object
-    c_int = c_double = None
-
 class _Foo(Structure):
     _fields_ = [
         ('x', c_int),
@@ -1595,10 +1597,8 @@ class _TestSharedCTypes(BaseTestCase):
         for i in range(len(arr)):
             arr[i] *= 2
 
+    @unittest.skipIf(c_int is None, "requires _ctypes")
     def test_sharedctypes(self, lock=False):
-        if c_int is None:
-            return
-
         x = Value('i', 7, lock=lock)
         y = Value(c_double, 1.0/3.0, lock=lock)
         foo = Value(_Foo, 3, 2, lock=lock)
@@ -1621,10 +1621,8 @@ class _TestSharedCTypes(BaseTestCase):
     def test_synchronize(self):
         self.test_sharedctypes(lock=True)
 
+    @unittest.skipIf(c_int is None, "requires _ctypes")
     def test_copy(self):
-        if c_int is None:
-            return
-
         foo = _Foo(2, 5.0)
         bar = copy(foo)
         foo.x = 0
@@ -1696,13 +1694,17 @@ class _TestImportStar(BaseTestCase):
     ALLOWED_TYPES = ('processes',)
 
     def test_import(self):
-        modules = (
+        modules = [
             'multiprocessing', 'multiprocessing.connection',
             'multiprocessing.heap', 'multiprocessing.managers',
             'multiprocessing.pool', 'multiprocessing.process',
-            'multiprocessing.reduction', 'multiprocessing.sharedctypes',
+            'multiprocessing.reduction',
             'multiprocessing.synchronize', 'multiprocessing.util'
-            )
+            ]
+
+        if c_int is not None:
+            # This module requires _ctypes
+            modules.append('multiprocessing.sharedctypes')
 
         for name in modules:
             __import__(name)
@@ -1782,12 +1784,12 @@ class _TestLogging(BaseTestCase):
 
 class TestInvalidHandle(unittest.TestCase):
 
+    @unittest.skipIf(WIN32, "skipped on Windows")
     def test_invalid_handles(self):
-        if WIN32:
-            return
         conn = _multiprocessing.Connection(44977608)
         self.assertRaises(IOError, conn.poll)
         self.assertRaises(IOError, _multiprocessing.Connection, -1)
+
 #
 # Functions used to create test cases from the base ones in this module
 #
@@ -1804,7 +1806,7 @@ def get_attributes(Source, names):
 def create_test_cases(Mixin, type):
     result = {}
     glob = globals()
-    Type = type[0].upper() + type[1:]
+    Type = type.capitalize()
 
     for name in list(glob.keys()):
         if name.startswith('_Test'):
diff --git a/Lib/test/test_pep277.py b/Lib/test/test_pep277.py
index 1465d54e752..aba1368997b 100644
--- a/Lib/test/test_pep277.py
+++ b/Lib/test/test_pep277.py
@@ -15,11 +15,6 @@ filenames = [
     '\u66e8\u66e9\u66eb',
     '\u66e8\u05e9\u3093\u0434\u0393\xdf',
     # Specific code points: fn, NFC(fn) and NFKC(fn) all differents
-    '\u2000\u2000\u2000A',
-    '\u2001\u2001\u2001A',
-    '\u2003\u2003\u2003A',  # == NFC('\u2001\u2001\u2001A')
-    '\u0020\u0020\u0020A',  # '\u0020' == ' ' == NFKC('\u2000')
-                            # '\u0020' == NFKC('\u2001') == NFKC('\u2003')
     '\u1fee\u1ffd',
     # Specific code points: NFC(fn), NFD(fn), NFKC(fn) and NFKD(fn) all differents
     '\u0385\u03d3\u03d4',
@@ -28,6 +23,22 @@ filenames = [
     '\u1e9b\u1fc1\u1fcd\u1fce\u1fcf\u1fdd\u1fde\u1fdf\u1fed',
     ]
 
+# Mac OS X decomposes Unicode names, using Normal Form D.
+# http://developer.apple.com/mac/library/qa/qa2001/qa1173.html
+# "However, most volume formats do not follow the exact specification for
+# these normal forms.  For example, HFS Plus uses a variant of Normal Form D
+# in which U+2000 through U+2FFF, U+F900 through U+FAFF, and U+2F800 through
+# U+2FAFF are not decomposed."
+if sys.platform != 'darwin':
+    filenames.extend([
+        # Specific code points: fn, NFC(fn) and NFKC(fn) all differents
+        '\u1fee\u1ffd\ufad1',
+        '\u2000\u2000\u2000A',
+        '\u2001\u2001\u2001A',
+        '\u2003\u2003\u2003A',  # == NFC('\u2001\u2001\u2001A')
+        '\u0020\u0020\u0020A',  # '\u0020' == ' ' == NFKC('\u2000') ==
+                                #  NFKC('\u2001') == NFKC('\u2003')
+])
 
 # Destroy directory dirname and all files under it, to one level.
 def deltree(dirname):
@@ -114,8 +125,7 @@ class UnicodeFileTests(unittest.TestCase):
             files = set(normalize('NFD', file) for file in files)
         for name in others:
             if sys.platform == 'darwin' and normalize('NFD', name) in files:
-                # Mac OS X decomposes Unicode names, using Normal Form D.
-                # http://developer.apple.com/mac/library/qa/qa2001/qa1173.html
+                # Mac OS X decomposes Unicode names.  See comment above.
                 os.stat(name)
                 continue
             self._apply_failure(open, name, IOError)
@@ -131,8 +141,7 @@ class UnicodeFileTests(unittest.TestCase):
         f1 = os.listdir(support.TESTFN.encode(sys.getfilesystemencoding()))
         f2 = os.listdir(support.TESTFN)
         if sys.platform == 'darwin':
-            # Mac OS X returns canonically decomposed Unicode (Normal Form D)
-            # http://developer.apple.com/mac/library/qa/qa2001/qa1173.html
+            # Mac OS X decomposes Unicode names.  See comment above.
             sf0 = set(normalize('NFD', f) for f in self.files)
             f2 = [normalize('NFD', f) for f in f2]
         sf2 = set(os.path.join(support.TESTFN, f) for f in f2)
diff --git a/Lib/test/test_warnings.py b/Lib/test/test_warnings.py
index dda704e22f5..7bd71914b4a 100644
--- a/Lib/test/test_warnings.py
+++ b/Lib/test/test_warnings.py
@@ -27,11 +27,15 @@ def warnings_state(module):
     except NameError:
         pass
     original_warnings = warning_tests.warnings
+    original_filters = module.filters
     try:
+        module.filters = original_filters[:]
+        module.simplefilter("once")
         warning_tests.warnings = module
         yield
     finally:
         warning_tests.warnings = original_warnings
+        module.filters = original_filters
 
 
 class BaseTest(unittest.TestCase):
@@ -194,6 +198,7 @@ class WarnTests(unittest.TestCase):
     def test_message(self):
         with original_warnings.catch_warnings(record=True,
                 module=self.module) as w:
+            self.module.simplefilter("once")
             for i in range(4):
                 text = 'multi %d' %i  # Different text on each call.
                 self.module.warn(text)
@@ -206,6 +211,7 @@ class WarnTests(unittest.TestCase):
         for ob in (Warning, None, 42):
             with original_warnings.catch_warnings(record=True,
                     module=self.module) as w:
+                self.module.simplefilter("once")
                 self.module.warn(ob)
                 # Don't directly compare objects since
                 # ``Warning() != Warning()``.
diff --git a/Lib/turtle.py b/Lib/turtle.py
index 1355d564adb..6f0605984fd 100644
--- a/Lib/turtle.py
+++ b/Lib/turtle.py
@@ -778,7 +778,7 @@ class TurtleScreenBase(object):
         # needs amendment
         if not isinstance(self.cv, ScrolledCanvas):
             return self.canvwidth, self.canvheight
-        if canvwidth is None and canvheight is None and bg is None:
+        if canvwidth is canvheight is bg is None:
             return self.cv.canvwidth, self.cv.canvheight
         if canvwidth is not None:
             self.canvwidth = canvwidth
@@ -1046,7 +1046,7 @@ class TurtleScreen(TurtleScreenBase):
         >>> mode()
         'logo'
         """
-        if mode == None:
+        if mode is None:
             return self._mode
         mode = mode.lower()
         if mode not in ["standard", "logo", "world"]:
@@ -1385,7 +1385,7 @@ class TurtleScreen(TurtleScreenBase):
         ### repeatedly pressing the up-arrow key,
         ### consequently drawing a hexagon
         """
-        if fun == None:
+        if fun is None:
             if key in self._keys:
                 self._keys.remove(key)
         elif key not in self._keys:
@@ -1418,7 +1418,7 @@ class TurtleScreen(TurtleScreenBase):
         ### or by keeping pressed the up-arrow key.
         ### consequently drawing a hexagon.
         """
-        if fun == None:
+        if fun is None:
             if key in self._keys:
                 self._keys.remove(key)
         elif key is not None and key not in self._keys:
@@ -1540,7 +1540,7 @@ class TNavigator(object):
     def _setmode(self, mode=None):
         """Set turtle-mode to 'standard', 'world' or 'logo'.
         """
-        if mode == None:
+        if mode is None:
             return self._mode
         if mode not in ["standard", "logo", "world"]:
             return
@@ -2795,7 +2795,7 @@ class RawTurtle(TPen, TNavigator):
         >>> turtle.shapesize(5, 5, 12)
         >>> turtle.shapesize(outline=8)
         """
-        if stretch_wid is stretch_len is outline == None:
+        if stretch_wid is stretch_len is outline is None:
             stretch_wid, stretch_len = self._stretchfactor
             return stretch_wid, stretch_len, self._outlinewidth
         if stretch_wid == 0 or stretch_len == 0:
diff --git a/Lib/unittest/test/test_assertions.py b/Lib/unittest/test/test_assertions.py
index 68a723ae433..fe658492f33 100644
--- a/Lib/unittest/test/test_assertions.py
+++ b/Lib/unittest/test/test_assertions.py
@@ -1,7 +1,5 @@
 import unittest
 
-import warnings
-
 
 class Test_Assertions(unittest.TestCase):
     def test_AlmostEqual(self):
@@ -108,11 +106,9 @@ class TestLongMessage(unittest.TestCase):
         self.testableTrue._formatMessage(object(), 'foo')
 
     def test_formatMessage_unicode_error(self):
-        with warnings.catch_warnings(record=True):
-            # This causes a UnicodeWarning due to its craziness
-            one = ''.join(chr(i) for i in range(255))
-            # this used to cause a UnicodeDecodeError constructing msg
-            self.testableTrue._formatMessage(one, '\uFFFD')
+        one = ''.join(chr(i) for i in range(255))
+        # this used to cause a UnicodeDecodeError constructing msg
+        self.testableTrue._formatMessage(one, '\uFFFD')
 
     def assertMessages(self, methodName, args, errors):
         def getMethod(i):
diff --git a/Lib/unittest/test/test_case.py b/Lib/unittest/test/test_case.py
index c9f346f3534..08c4a7b20af 100644
--- a/Lib/unittest/test/test_case.py
+++ b/Lib/unittest/test/test_case.py
@@ -1,6 +1,5 @@
 import re
 import sys
-import warnings
 
 from copy import deepcopy
 from test import support
@@ -496,12 +495,10 @@ class Test_TestCase(unittest.TestCase, TestEquality, TestHashing):
         with self.assertRaises(self.failureException):
             self.assertDictContainsSubset({'a': 1, 'c': 1}, {'a': 1})
 
-        with warnings.catch_warnings(record=True):
-            # silence the UnicodeWarning
-            one = ''.join(chr(i) for i in range(255))
-            # this used to cause a UnicodeDecodeError constructing the failure msg
-            with self.assertRaises(self.failureException):
-                self.assertDictContainsSubset({'foo': one}, {'foo': '\uFFFD'})
+        one = ''.join(chr(i) for i in range(255))
+        # this used to cause a UnicodeDecodeError constructing the failure msg
+        with self.assertRaises(self.failureException):
+            self.assertDictContainsSubset({'foo': one}, {'foo': '\uFFFD'})
 
     def testAssertEqual(self):
         equal_pairs = [
@@ -615,9 +612,9 @@ class Test_TestCase(unittest.TestCase, TestEquality, TestHashing):
         # hashable types, but not orderable
         self.assertRaises(self.failureException, self.assertItemsEqual,
                           [], [divmod, 'x', 1, 5j, 2j, frozenset()])
-        # comparing dicts raises a py3k warning
+        # comparing dicts
         self.assertItemsEqual([{'a': 1}, {'b': 2}], [{'b': 2}, {'a': 1}])
-        # comparing heterogenous non-hashable sequences raises a py3k warning
+        # comparing heterogenous non-hashable sequences
         self.assertItemsEqual([1, 'x', divmod, []], [divmod, [], 'x', 1])
         self.assertRaises(self.failureException, self.assertItemsEqual,
                           [], [divmod, [], 'x', 1, 5j, 2j, set()])
@@ -852,10 +849,9 @@ test case
             (self.assertSameElements, ([1, 1, 2, 3], [1, 2, 3]))
         )
         for meth, args in old:
-            with warnings.catch_warnings(record=True) as w:
+            with support.check_warnings(('', DeprecationWarning)) as w:
                 meth(*args)
-            self.assertEqual(len(w), 1)
-            self.assertIs(w[0].category, DeprecationWarning)
+            self.assertEqual(len(w.warnings), 1)
 
     def testDeepcopy(self):
         # Issue: 5660
diff --git a/Lib/unittest/test/test_result.py b/Lib/unittest/test/test_result.py
index 9002466b5e7..967b662b4da 100644
--- a/Lib/unittest/test/test_result.py
+++ b/Lib/unittest/test/test_result.py
@@ -308,12 +308,11 @@ OldResult = type('OldResult', (object,), classDict)
 class Test_OldTestResult(unittest.TestCase):
 
     def assertOldResultWarning(self, test, failures):
-        with warnings.catch_warnings(record=True) as log:
+        with support.check_warnings(("TestResult has no add.+ method,",
+                                     RuntimeWarning)):
             result = OldResult()
             test.run(result)
             self.assertEqual(len(result.failures), failures)
-            warning, = log
-            self.assertIs(warning.category, RuntimeWarning)
 
     def testOldTestResult(self):
         class Test(unittest.TestCase):
diff --git a/Misc/NEWS b/Misc/NEWS
index b7c926971a1..3de388e6405 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -302,6 +302,9 @@ Library
   some methods (such as oss_mixer_device.fileno()) were not available.
   Initial patch by Bertrand Janin.
 
+- Issue #8205: Remove the "Modules" directory from sys.path when Python is
+  running from the build directory (POSIX only).
+
 - Issue #7512: shutil.copystat() could raise an OSError when the filesystem
   didn't support chflags() (for example ZFS under FreeBSD).  The error is
   now silenced.
@@ -950,8 +953,8 @@ Documentation
 Tests
 -----
 
-- Issue #8180: Fix test_pep277 on OS X and add more tests for special Unicode
-  normalization cases.
+- Issue #8180 and #8207: Fix test_pep277 on OS X and add more tests for special
+  Unicode normalization cases.
 
 - Issue #7783: test.support.open_urlresource invalidates the outdated files
   from the local cache.