diff --git a/Lib/unittest.py b/Lib/unittest.py
index 000c201..b9ef3d7 100644
--- a/Lib/unittest.py
+++ b/Lib/unittest.py
@@ -251,12 +251,16 @@
                (_strclass(self.__class__), self.testsRun, len(self.errors),
                 len(self.failures))
 
+
 class AssertRaisesContext(object):
+
     def __init__(self, expected, test_case):
         self.expected = expected
         self.failureException = test_case.failureException
+
     def __enter__(self):
         pass
+
     def __exit__(self, exc_type, exc_value, traceback):
         if exc_type is None:
             try:
@@ -270,6 +274,7 @@
         # Let unexpected exceptions skip through
         return False
 
+
 class TestCase(object):
     """A class whose instances are single test cases.
 
@@ -303,13 +308,13 @@
            method when executed. Raises a ValueError if the instance does
            not have a method with the specified name.
         """
+        self._testMethodName = methodName
         try:
-            self._testMethodName = methodName
             testMethod = getattr(self, methodName)
-            self._testMethodDoc = testMethod.__doc__
         except AttributeError:
             raise ValueError("no such test method in %s: %s" % \
                   (self.__class__, methodName))
+        self._testMethodDoc = testMethod.__doc__
 
     def setUp(self):
         "Hook method for setting up the test fixture before exercising it."
@@ -340,7 +345,7 @@
 
     def __eq__(self, other):
         if type(self) is not type(other):
-            return False
+            return NotImplemented
 
         return self._testMethodName == other._testMethodName
 
@@ -358,7 +363,8 @@
                (_strclass(self.__class__), self._testMethodName)
 
     def run(self, result=None):
-        if result is None: result = self.defaultTestResult()
+        if result is None:
+            result = self.defaultTestResult()
         result.startTest(self)
         testMethod = getattr(self, self._testMethodName)
         try:
@@ -423,11 +429,13 @@
 
     def failIf(self, expr, msg=None):
         "Fail the test if the expression is true."
-        if expr: raise self.failureException(msg)
+        if expr:
+            raise self.failureException(msg)
 
     def failUnless(self, expr, msg=None):
         """Fail the test unless the expression is true."""
-        if not expr: raise self.failureException(msg)
+        if not expr:
+            raise self.failureException(msg)
 
     def failUnlessRaises(self, excClass, callableObj=None, *args, **kwargs):
         """Fail unless an exception of class excClass is thrown
@@ -521,8 +529,6 @@
     def __repr__(self):
         return "<%s tests=%s>" % (_strclass(self.__class__), self._tests)
 
-    __str__ = __repr__
-
     def __eq__(self, other):
         if not isinstance(other, self.__class__):
             return NotImplemented
@@ -547,8 +553,7 @@
         # sanity checks
         if not hasattr(test, '__call__'):
             raise TypeError("the test to add must be callable")
-        if (isinstance(test, (type, types.ClassType)) and
-            issubclass(test, (TestCase, TestSuite))):
+        if isinstance(test, type) and issubclass(test, (TestCase, TestSuite)):
             raise TypeError("TestCases and TestSuites must be instantiated "
                             "before passing them to addTest()")
         self._tests.append(test)
@@ -571,7 +576,8 @@
 
     def debug(self):
         """Run the tests without collecting errors in a TestResult"""
-        for test in self._tests: test.debug()
+        for test in self._tests:
+            test.debug()
 
 
 class ClassTestSuite(TestSuite):
@@ -614,9 +620,8 @@
     always be called if the set-up ('setUp') function ran successfully.
     """
 
-    def __init__(self, testFunc, setUp=None, tearDown=None,
-                 description=None):
-        TestCase.__init__(self)
+    def __init__(self, testFunc, setUp=None, tearDown=None, description=None):
+        super(FunctionTestCase, self).__init__()
         self.__setUpFunc = setUp
         self.__tearDownFunc = tearDown
         self.__testFunc = testFunc
@@ -637,8 +642,8 @@
         return self.__testFunc.__name__
 
     def __eq__(self, other):
-        if type(self) is not type(other):
-            return False
+        if not isinstance(other, self.__class__):
+            return NotImplemented
 
         return self.__setUpFunc == other.__setUpFunc and \
                self.__tearDownFunc == other.__tearDownFunc and \
@@ -670,8 +675,9 @@
 ##############################################################################
 
 class TestLoader(object):
-    """This class is responsible for loading tests according to various
-    criteria and returning them wrapped in a TestSuite
+    """
+    This class is responsible for loading tests according to various criteria
+    and returning them wrapped in a TestSuite
     """
     testMethodPrefix = 'test'
     sortTestMethodsUsing = cmp
@@ -681,7 +687,8 @@
     def loadTestsFromTestCase(self, testCaseClass):
         """Return a suite of all tests cases contained in testCaseClass"""
         if issubclass(testCaseClass, TestSuite):
-            raise TypeError("Test cases should not be derived from TestSuite. Maybe you meant to derive from TestCase?")
+            raise TypeError("Test cases should not be derived from TestSuite." \
+                                " Maybe you meant to derive from TestCase?")
         testCaseNames = self.getTestCaseNames(testCaseClass)
         if not testCaseNames and hasattr(testCaseClass, 'runTest'):
             testCaseNames = ['runTest']
@@ -694,8 +701,7 @@
         tests = []
         for name in dir(module):
             obj = getattr(module, name)
-            if (isinstance(obj, (type, types.ClassType)) and
-                issubclass(obj, TestCase)):
+            if isinstance(obj, type) and issubclass(obj, TestCase):
                 tests.append(self.loadTestsFromTestCase(obj))
         return self.suiteClass(tests)
 
@@ -717,7 +723,8 @@
                     break
                 except ImportError:
                     del parts_copy[-1]
-                    if not parts_copy: raise
+                    if not parts_copy:
+                        raise
             parts = parts[1:]
         obj = module
         for part in parts:
@@ -725,11 +732,10 @@
 
         if isinstance(obj, types.ModuleType):
             return self.loadTestsFromModule(obj)
-        elif (isinstance(obj, (type, types.ClassType)) and
-              issubclass(obj, TestCase)):
+        elif isinstance(obj, type) and issubclass(obj, TestCase):
             return self.loadTestsFromTestCase(obj)
         elif (isinstance(obj, types.UnboundMethodType) and
-              isinstance(parent, (type, types.ClassType)) and
+              isinstance(parent, type) and
               issubclass(parent, TestCase)):
             return TestSuite([parent(obj.__name__)])
         elif isinstance(obj, TestSuite):
@@ -756,8 +762,10 @@
     def getTestCaseNames(self, testCaseClass):
         """Return a sorted sequence of method names found within testCaseClass
         """
-        def isTestMethod(attrname, testCaseClass=testCaseClass, prefix=self.testMethodPrefix):
-            return attrname.startswith(prefix) and hasattr(getattr(testCaseClass, attrname), '__call__')
+        def isTestMethod(attrname, testCaseClass=testCaseClass,
+                         prefix=self.testMethodPrefix):
+            return attrname.startswith(prefix) and \
+                hasattr(getattr(testCaseClass, attrname), '__call__')
         testFnNames = filter(isTestMethod, dir(testCaseClass))
         if self.sortTestMethodsUsing:
             testFnNames.sort(key=_CmpToKey(self.sortTestMethodsUsing))
@@ -815,7 +823,7 @@
     separator2 = '-' * 70
 
     def __init__(self, stream, descriptions, verbosity):
-        TestResult.__init__(self)
+        super(_TextTestResult, self).__init__()
         self.stream = stream
         self.showAll = verbosity > 1
         self.dots = verbosity == 1
@@ -828,14 +836,14 @@
             return str(test)
 
     def startTest(self, test):
-        TestResult.startTest(self, test)
+        super(_TextTestResult, self).startTest(test)
         if self.showAll:
             self.stream.write(self.getDescription(test))
             self.stream.write(" ... ")
             self.stream.flush()
 
     def addSuccess(self, test):
-        TestResult.addSuccess(self, test)
+        super(_TextTestResult, self).addSuccess(test)
         if self.showAll:
             self.stream.writeln("ok")
         elif self.dots:
@@ -843,7 +851,7 @@
             self.stream.flush()
 
     def addError(self, test, err):
-        TestResult.addError(self, test, err)
+        super(_TextTestResult, self).addError(test, err)
         if self.showAll:
             self.stream.writeln("ERROR")
         elif self.dots:
@@ -851,7 +859,7 @@
             self.stream.flush()
 
     def addFailure(self, test, err):
-        TestResult.addFailure(self, test, err)
+        super(_TextTestResult, self).addFailure(test, err)
         if self.showAll:
             self.stream.writeln("FAIL")
         elif self.dots:
@@ -859,7 +867,7 @@
             self.stream.flush()
 
     def addSkip(self, test, reason):
-        TestResult.addSkip(self, test, reason)
+        super(_TextTestResult, self).addSkip(test, reason)
         if self.showAll:
             self.stream.writeln("skipped {0!r}".format(reason))
         elif self.dots:
@@ -867,7 +875,7 @@
             self.stream.flush()
 
     def addExpectedFailure(self, test, err):
-        TestResult.addExpectedFailure(self, test, err)
+        super(_TextTestResult, self).addExpectedFailure(test, err)
         if self.showAll:
             self.stream.writeln("expected failure")
         elif self.dots:
@@ -875,7 +883,7 @@
             self.stream.flush()
 
     def addUnexpectedSuccess(self, test):
-        TestResult.addUnexpectedSuccess(self, test)
+        super(_TextTestResult, self).addUnexpectedSuccess(test)
         if self.showAll:
             self.stream.writeln("unexpected success")
         elif self.dots:
@@ -936,13 +944,13 @@
             if errored:
                 infos.append("errors=%d" % errored)
         else:
-            self.stream.write("OK")
+            self.stream.writeln("OK")
         if skipped:
             infos.append("skipped=%d" % skipped)
-        if expected_fails:
-            infos.append("expected failures=%d" % expected_fails)
-        if unexpected_successes:
-            infos.append("unexpected successes=%d" % unexpected_successes)
+        if expectedFails:
+            infos.append("expected failures=%d" % expectedFails)
+        if unexpectedSuccesses:
+            infos.append("unexpected successes=%d" % unexpectedSuccesses)
         if infos:
             self.stream.writeln(" (%s)" % (", ".join(infos),))
         return result
@@ -992,7 +1000,8 @@
         self.runTests()
 
     def usageExit(self, msg=None):
-        if msg: print msg
+        if msg:
+            print msg
         print self.USAGE % self.__dict__
         sys.exit(2)