diff --git a/.travis.yml b/.travis.yml
index a13b528..b80f444 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -21,6 +21,6 @@
  - pip list
  - python --version
 script:
- - unit2
+ - python -m unittest discover
  - if [ -z "$SKIP_DOCS" ]; then python setup.py build_sphinx; fi
  - rst2html.py --strict README.rst README.html
diff --git a/docs/conf.py b/docs/conf.py
index d32357d..6368a01 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -33,7 +33,6 @@
 import sys
 import mock
 from mock import * # yeah, I know :-/
-import unittest2
 import __main__
 
 if os.getcwd() not in sys.path:
diff --git a/docs/index.txt b/docs/index.txt
index 6c8e37b..9f6e3c2 100644
--- a/docs/index.txt
+++ b/docs/index.txt
@@ -90,7 +90,7 @@
 Bug Reports
 +++++++++++
 
-Mock uses `unittest2 <http://pypi.python.org/pypi/unittest2>`_ for its own
+Mock uses `unittest <https://docs.python.org/3/library/unittest.html>`_ for its own
 Issues with the backport process, such as compatibility with a particular
 Python, should be reported to the `bug tracker
 <https://github.com/testing-cabal/mock/issues>`_. Feature requests and issues
diff --git a/mock/tests/testcallable.py b/mock/tests/testcallable.py
index 10acdc3..c3cf2e5 100644
--- a/mock/tests/testcallable.py
+++ b/mock/tests/testcallable.py
@@ -2,7 +2,7 @@
 # E-mail: fuzzyman AT voidspace DOT org DOT uk
 # http://www.voidspace.org.uk/python/mock/
 
-import unittest2 as unittest
+import unittest
 from mock.tests.support import is_instance, X, SomeClass
 
 from mock import (
diff --git a/mock/tests/testhelpers.py b/mock/tests/testhelpers.py
index a87df1b..eb38b21 100644
--- a/mock/tests/testhelpers.py
+++ b/mock/tests/testhelpers.py
@@ -3,7 +3,7 @@
 # http://www.voidspace.org.uk/python/mock/
 
 import six
-import unittest2 as unittest
+import unittest
 
 from mock import (
     call, create_autospec, MagicMock,
diff --git a/mock/tests/testmagicmethods.py b/mock/tests/testmagicmethods.py
index f47a202..73e5a0f 100644
--- a/mock/tests/testmagicmethods.py
+++ b/mock/tests/testmagicmethods.py
@@ -14,9 +14,9 @@
 import inspect
 import sys
 import textwrap
+import unittest
 
 import six
-import unittest2 as unittest
 
 from mock import Mock, MagicMock
 from mock.mock import _magics
@@ -405,7 +405,7 @@
         mock = MagicMock()
         def set_setattr():
             mock.__setattr__ = lambda self, name: None
-        self.assertRaisesRegex(AttributeError,
+        self.assertRaisesRegexp(AttributeError,
             "Attempting to set unsupported magic method '__setattr__'.",
             set_setattr
         )
diff --git a/mock/tests/testmock.py b/mock/tests/testmock.py
index 66323e9..f7049c6 100644
--- a/mock/tests/testmock.py
+++ b/mock/tests/testmock.py
@@ -8,7 +8,7 @@
 import tempfile
 
 import six
-import unittest2 as unittest
+import unittest
 
 import mock
 from mock import (
@@ -205,7 +205,7 @@
 
         mock = create_autospec(f)
         mock.side_effect = ValueError('Bazinga!')
-        self.assertRaisesRegex(ValueError, 'Bazinga!', mock)
+        self.assertRaisesRegexp(ValueError, 'Bazinga!', mock)
 
     @unittest.skipUnless('java' in sys.platform,
                           'This test only applies to Jython')
@@ -501,7 +501,7 @@
 
                 # this should be allowed
                 mock.something
-                self.assertRaisesRegex(
+                self.assertRaisesRegexp(
                     AttributeError,
                     "Mock object has no attribute 'something_else'",
                     getattr, mock, 'something_else'
@@ -520,12 +520,12 @@
             mock.x
             mock.y
             mock.__something__
-            self.assertRaisesRegex(
+            self.assertRaisesRegexp(
                 AttributeError,
                 "Mock object has no attribute 'z'",
                 getattr, mock, 'z'
             )
-            self.assertRaisesRegex(
+            self.assertRaisesRegexp(
                 AttributeError,
                 "Mock object has no attribute '__foobar__'",
                 getattr, mock, '__foobar__'
@@ -591,13 +591,13 @@
 
     def test_assert_called_with_message(self):
         mock = Mock()
-        self.assertRaisesRegex(AssertionError, 'Not called',
+        self.assertRaisesRegexp(AssertionError, 'Not called',
                                 mock.assert_called_with)
 
 
     def test_assert_called_once_with_message(self):
         mock = Mock(name='geoffrey')
-        self.assertRaisesRegex(AssertionError,
+        self.assertRaisesRegexp(AssertionError,
                      r"Expected 'geoffrey' to be called once\.",
                      mock.assert_called_once_with)
 
diff --git a/mock/tests/testpatch.py b/mock/tests/testpatch.py
index f31ccef..16fa168 100644
--- a/mock/tests/testpatch.py
+++ b/mock/tests/testpatch.py
@@ -6,7 +6,7 @@
 import sys
 
 import six
-import unittest2 as unittest
+import unittest
 
 from mock.tests import support
 from mock.tests.support import SomeClass, is_instance
diff --git a/mock/tests/testsentinel.py b/mock/tests/testsentinel.py
index 69b2042..3253fa3 100644
--- a/mock/tests/testsentinel.py
+++ b/mock/tests/testsentinel.py
@@ -2,7 +2,7 @@
 # E-mail: fuzzyman AT voidspace DOT org DOT uk
 # http://www.voidspace.org.uk/python/mock/
 
-import unittest2 as unittest
+import unittest
 
 from mock import sentinel, DEFAULT
 
diff --git a/mock/tests/testwith.py b/mock/tests/testwith.py
index aa7812b..ad340ab 100644
--- a/mock/tests/testwith.py
+++ b/mock/tests/testwith.py
@@ -4,7 +4,7 @@
 
 from warnings import catch_warnings
 
-import unittest2 as unittest
+import unittest
 
 from mock.tests.support import is_instance
 from mock import MagicMock, Mock, patch, sentinel, mock_open, call
diff --git a/setup.cfg b/setup.cfg
index 25c280b..02a9b7a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -29,8 +29,6 @@
     testing, test, mock, mocking, unittest, patching, stubs, fakes, doubles
 
 [extras]
-test =
-  unittest2>=1.1.0
 docs =
   sphinx
 
diff --git a/tox.ini b/tox.ini
index d7fef31..4ac890b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,21 +2,14 @@
 envlist = py27,pypy,py33,jython
 
 [testenv]
-deps=unittest2
-commands={envbindir}/unit2 discover []
+commands={envbindir}/python -m unittest discover []
 
 [testenv:py27]
 commands=
-    {envbindir}/unit2 discover []
+    {envbindir}/python -m unittest discover []
     {envbindir}/sphinx-build -E -b doctest docs html
 deps =
-    unittest2
     sphinx
 
-[testenv:py33]
-commands=
-    {envbindir}/python -m unittest discover []
-deps =
-
 # note for jython. Execute in tests directory:
-# rm `find . -name '*$py.class'`
\ No newline at end of file
+# rm `find . -name '*$py.class'`
diff --git a/unittest.cfg b/unittest.cfg
deleted file mode 100644
index b2d6f67..0000000
--- a/unittest.cfg
+++ /dev/null
@@ -1,95 +0,0 @@
-
-[unittest]
-plugins = 
-    unittest2.plugins.debugger
-    unittest2.plugins.checker
-    unittest2.plugins.doctestloader
-    unittest2.plugins.matchregexp
-    unittest2.plugins.moduleloading
-    unittest2.plugins.testcoverage
-    unittest2.plugins.growl
-    unittest2.plugins.filtertests
-    unittest2.plugins.junitxml
-    unittest2.plugins.timed
-    unittest2.plugins.counttests
-    unittest2.plugins.logchannels
-
-excluded-plugins =
-
-# 0, 1 or 2 (default is 1)
-# quiet, normal or verbose
-# can be overriden at command line
-verbosity = normal
-
-# true or false
-# even if false can be switched on at command line
-catch =
-buffer =
-failfast =
-
-
-[matchregexp]
-always-on = False
-full-path = True
-
-[debugger]
-always-on = False
-errors-only = True
-
-[coverage]
-always-on = False
-config =
-report-html = False
-# only used if report-html is false
-annotate = False
-# defaults to './htmlcov/'
-html-directory =
-# if unset will output to console
-text-file =
-branch = False
-timid = False
-cover-pylib = False
-exclude-lines = 
-    # Have to re-enable the standard pragma
-    pragma: no cover
-
-    # Don't complain about missing debug-only code:
-    def __repr__
-    if self\.debug
-
-    # Don't complain if tests don't hit defensive assertion code:
-    raise AssertionError
-    raise NotImplementedError
-
-    # Don't complain if non-runnable code isn't run:
-    if 0:
-    if __name__ == .__main__.
-    
-ignore-errors = False
-modules =
-
-[growl]
-always-on = False
-
-[doctest]
-always-on = False
-
-[module-loading]
-always-on = False
-
-[checker]
-always-on = False
-pep8 = False
-pyflakes = True
-
-[junit-xml]
-always-on = False
-path = junit.xml
-
-[timed]
-always-on = True
-threshold = 0.01
-
-[count]
-always-on = True
-enhanced = False