diff -ru testtools-2.4.0-orig/requirements.txt testtools-2.4.0/requirements.txt
--- testtools-2.4.0-orig/requirements.txt	2018-04-04 16:27:14.000000000 -0700
+++ testtools-2.4.0/requirements.txt	2020-04-03 17:03:31.776205598 -0700
@@ -4,6 +4,4 @@
 # 'mimeparse' has not been uploaded by the maintainer with Python3 compat
 # but someone kindly uploaded a fixed version as 'python-mimeparse'.
 python-mimeparse
-unittest2>=1.0.0
-traceback2
 six>=1.4.0
diff -ru testtools-2.4.0-orig/setup.cfg testtools-2.4.0/setup.cfg
--- testtools-2.4.0-orig/setup.cfg	2020-03-14 07:30:56.000000000 -0700
+++ testtools-2.4.0/setup.cfg	2020-04-03 17:04:37.605592118 -0700
@@ -28,7 +28,6 @@
 test = 
 	testscenarios
 	testresources
-	unittest2>=1.1.0
 
 [files]
 packages = testtools
diff -ru testtools-2.4.0-orig/testtools/compat.py testtools-2.4.0/testtools/compat.py
--- testtools-2.4.0-orig/testtools/compat.py	2018-04-04 16:27:14.000000000 -0700
+++ testtools-2.4.0/testtools/compat.py	2020-04-03 17:02:34.047743583 -0700
@@ -33,10 +33,7 @@
 # To let setup.py work, make this a conditional import.
 linecache = try_import('linecache2')
 
-try:
-    from testtools import _compat2x as _compat
-except SyntaxError:
-    from testtools import _compat3x as _compat
+from testtools import _compat3x as _compat
 
 reraise = _compat.reraise
 
diff -ru testtools-2.4.0-orig/testtools/content.py testtools-2.4.0/testtools/content.py
--- testtools-2.4.0-orig/testtools/content.py	2018-04-04 16:27:14.000000000 -0700
+++ testtools-2.4.0/testtools/content.py	2020-04-03 17:05:23.037168731 -0700
@@ -17,10 +17,9 @@
 import json
 import os
 import sys
+import traceback
 
 from extras import try_import
-# To let setup.py work, make this a conditional import.
-traceback = try_import('traceback2')
 
 from testtools.compat import (
     _b,
diff -ru testtools-2.4.0-orig/testtools/run.py testtools-2.4.0/testtools/run.py
--- testtools-2.4.0-orig/testtools/run.py	2015-11-07 09:27:33.000000000 -0800
+++ testtools-2.4.0/testtools/run.py	2020-04-03 17:07:07.353196586 -0700
@@ -12,11 +12,9 @@
 from functools import partial
 import os.path
 import sys
+import unittest
 
 from extras import safe_hasattr, try_imports
-# To let setup.py work, make this a conditional import.
-unittest = try_imports(['unittest2', 'unittest'])
-
 from testtools import TextTestResult, testcase
 from testtools.compat import classtypes, istext, unicode_output_stream
 from testtools.testsuite import filter_by_ids, iterate_tests, sorted_tests
@@ -50,7 +48,6 @@
         describing things that failed to import.
     """
     unittest_import_strs = set([
-        'unittest2.loader.ModuleImportFailure.',
         'unittest.loader.ModuleImportFailure.',
         'discover.ModuleImportFailure.'
         ])
diff -ru testtools-2.4.0-orig/testtools/testcase.py testtools-2.4.0/testtools/testcase.py
--- testtools-2.4.0-orig/testtools/testcase.py	2019-11-28 00:58:29.000000000 -0800
+++ testtools-2.4.0/testtools/testcase.py	2020-04-03 17:27:49.122395535 -0700
@@ -19,22 +19,15 @@
 import copy
 import functools
 import itertools
+import six
 import sys
+import unittest
 import warnings
 
 from extras import (
     safe_hasattr,
     try_import,
     )
-# To let setup.py work, make this a conditional import.
-# Don't use extras.try_imports, as it interferes with PyCharm's unittest
-# detection algorithm. See: https://youtrack.jetbrains.com/issue/PY-26630
-try:
-    import unittest2 as unittest
-except ImportError:
-    import unittest
-import six
-
 from testtools import (
     content,
     )
@@ -66,23 +59,8 @@
 
 wraps = try_import('functools.wraps')
 
-
-class TestSkipped(Exception):
-    """Raised within TestCase.run() when a test is skipped."""
-TestSkipped = try_import('unittest.case.SkipTest', TestSkipped)
-TestSkipped = try_import('unittest2.case.SkipTest', TestSkipped)
-
-
-class _UnexpectedSuccess(Exception):
-    """An unexpected success was raised.
-
-    Note that this exception is private plumbing in testtools' testcase
-    module.
-    """
-_UnexpectedSuccess = try_import(
-    'unittest.case._UnexpectedSuccess', _UnexpectedSuccess)
-_UnexpectedSuccess = try_import(
-    'unittest2.case._UnexpectedSuccess', _UnexpectedSuccess)
+from unittest.case import SkipTest as TestSkipped
+from unittest.case import _UnexpectedSuccess
 
 
 class _ExpectedFailure(Exception):
@@ -93,8 +71,6 @@
     """
 _ExpectedFailure = try_import(
     'unittest.case._ExpectedFailure', _ExpectedFailure)
-_ExpectedFailure = try_import(
-    'unittest2.case._ExpectedFailure', _ExpectedFailure)
 
 
 # Copied from unittest before python 3.4 release. Used to maintain
diff -ru testtools-2.4.0-orig/testtools/tests/test_compat.py testtools-2.4.0/testtools/tests/test_compat.py
--- testtools-2.4.0-orig/testtools/tests/test_compat.py	2019-11-28 00:58:29.000000000 -0800
+++ testtools-2.4.0/testtools/tests/test_compat.py	2020-04-03 17:11:59.211436348 -0700
@@ -4,7 +4,7 @@
 
 import ast
 import io
-import linecache2 as linecache
+import linecache
 import os
 import sys
 import tempfile
diff -ru testtools-2.4.0-orig/testtools/tests/test_run.py testtools-2.4.0/testtools/tests/test_run.py
--- testtools-2.4.0-orig/testtools/tests/test_run.py	2015-11-07 09:27:33.000000000 -0800
+++ testtools-2.4.0/testtools/tests/test_run.py	2020-04-03 17:30:21.725938899 -0700
@@ -10,7 +10,7 @@
 from extras import try_import
 fixtures = try_import('fixtures')
 testresources = try_import('testresources')
-import unittest2
+import unittest
 
 import testtools
 from testtools import TestCase, run, skipUnless
@@ -195,13 +195,13 @@
         broken = self.useFixture(SampleTestFixture(broken=True))
         out = StringIO()
         # XXX: http://bugs.python.org/issue22811
-        unittest2.defaultTestLoader._top_level_dir = None
+        unittest.defaultTestLoader._top_level_dir = None
         exc = self.assertRaises(
             SystemExit,
             run.main, ['prog', 'discover', '-l', broken.package.base, '*.py'], out)
         self.assertEqual(2, exc.args[0])
         self.assertThat(out.getvalue(), DocTestMatches("""\
-unittest2.loader._FailedTest.runexample
+unittest.loader._FailedTest.runexample
 Failed to import test module: runexample
 Traceback (most recent call last):
   File ".../loader.py", line ..., in _find_test_path
@@ -345,7 +345,7 @@
         pkg = self.useFixture(SampleLoadTestsPackage())
         out = StringIO()
         # XXX: http://bugs.python.org/issue22811
-        unittest2.defaultTestLoader._top_level_dir = None
+        unittest.defaultTestLoader._top_level_dir = None
         self.assertEqual(None, run.main(
             ['prog', 'discover', '-l', pkg.package.base], out))
         self.assertEqual(dedent("""\
diff -ru testtools-2.4.0-orig/testtools/tests/test_testsuite.py testtools-2.4.0/testtools/tests/test_testsuite.py
--- testtools-2.4.0-orig/testtools/tests/test_testsuite.py	2018-04-04 16:27:14.000000000 -0700
+++ testtools-2.4.0/testtools/tests/test_testsuite.py	2020-04-03 17:13:27.006601122 -0700
@@ -5,7 +5,6 @@
 import doctest
 from pprint import pformat
 import unittest
-import unittest2
 
 from extras import try_import
 
@@ -223,9 +222,9 @@
                 raise cls.skipException('foo')
             def test_notrun(self):
                 pass
-        # Test discovery uses the default suite from unittest2 (unless users
+        # Test discovery uses the default suite from unittest (unless users
         # deliberately change things, in which case they keep both pieces).
-        suite = unittest2.TestSuite([Skips("test_notrun")])
+        suite = unittest.TestSuite([Skips("test_notrun")])
         log = []
         result = LoggingResult(log)
         suite.run(result)
@@ -240,9 +239,9 @@
                 super(Simples, cls).setUpClass()
             def test_simple(self):
                 pass
-        # Test discovery uses the default suite from unittest2 (unless users
+        # Test discovery uses the default suite from unittest (unless users
         # deliberately change things, in which case they keep both pieces).
-        suite = unittest2.TestSuite([Simples("test_simple")])
+        suite = unittest.TestSuite([Simples("test_simple")])
         log = []
         result = LoggingResult(log)
         suite.run(result)
diff -ru testtools-2.4.0-orig/testtools/tests/twistedsupport/test_deferred.py testtools-2.4.0/testtools/tests/twistedsupport/test_deferred.py
--- testtools-2.4.0-orig/testtools/tests/twistedsupport/test_deferred.py	2018-04-04 16:27:14.000000000 -0700
+++ testtools-2.4.0/testtools/tests/twistedsupport/test_deferred.py	2020-04-03 17:13:45.124428761 -0700
@@ -52,5 +52,5 @@
 
 
 def test_suite():
-    from unittest2 import TestLoader, TestSuite
+    from unittest import TestLoader, TestSuite
     return TestLoader().loadTestsFromName(__name__)
diff -ru testtools-2.4.0-orig/testtools/tests/twistedsupport/test_matchers.py testtools-2.4.0/testtools/tests/twistedsupport/test_matchers.py
--- testtools-2.4.0-orig/testtools/tests/twistedsupport/test_matchers.py	2018-04-04 16:27:14.000000000 -0700
+++ testtools-2.4.0/testtools/tests/twistedsupport/test_matchers.py	2020-04-03 17:13:58.452301968 -0700
@@ -205,5 +205,5 @@
 
 
 def test_suite():
-    from unittest2 import TestLoader, TestSuite
+    from unittest import TestLoader, TestSuite
     return TestLoader().loadTestsFromName(__name__)
diff -ru testtools-2.4.0-orig/testtools/tests/twistedsupport/test_runtest.py testtools-2.4.0/testtools/tests/twistedsupport/test_runtest.py
--- testtools-2.4.0-orig/testtools/tests/twistedsupport/test_runtest.py	2018-04-04 16:27:14.000000000 -0700
+++ testtools-2.4.0/testtools/tests/twistedsupport/test_runtest.py	2020-04-03 17:14:09.153200167 -0700
@@ -1016,7 +1016,7 @@
 
 
 def test_suite():
-    from unittest2 import TestLoader, TestSuite
+    from unittest import TestLoader, TestSuite
     return TestLoader().loadTestsFromName(__name__)
 
 
diff -ru testtools-2.4.0-orig/testtools/testsuite.py testtools-2.4.0/testtools/testsuite.py
--- testtools-2.4.0-orig/testtools/testsuite.py	2018-04-04 16:27:14.000000000 -0700
+++ testtools-2.4.0/testtools/testsuite.py	2020-04-03 17:02:34.047743583 -0700
@@ -17,8 +17,6 @@
 import unittest
 
 from extras import safe_hasattr, try_imports
-# This is just to let setup.py work, as testtools is imported in setup.py.
-unittest2 = try_imports(['unittest2', 'unittest'])
 Queue = try_imports(['Queue.Queue', 'queue.Queue'])
 
 import testtools
@@ -36,7 +34,7 @@
                 yield subtest
 
 
-class ConcurrentTestSuite(unittest2.TestSuite):
+class ConcurrentTestSuite(unittest.TestSuite):
     """A TestSuite whose run() calls out to a concurrency strategy."""
 
     def __init__(self, suite, make_tests, wrap_result=None):
@@ -199,7 +197,7 @@
             process_result.stopTestRun()
 
 
-class FixtureSuite(unittest2.TestSuite):
+class FixtureSuite(unittest.TestSuite):
 
     def __init__(self, fixture, tests):
         super(FixtureSuite, self).__init__(tests)
diff -ru testtools-2.4.0-orig/testtools.egg-info/requires.txt testtools-2.4.0/testtools.egg-info/requires.txt
--- testtools-2.4.0-orig/testtools.egg-info/requires.txt	2020-03-14 07:30:56.000000000 -0700
+++ testtools-2.4.0/testtools.egg-info/requires.txt	2020-04-03 17:31:06.316513271 -0700
@@ -3,10 +3,7 @@
 pbr>=0.11
 python-mimeparse
 six>=1.4.0
-traceback2
-unittest2>=1.0.0
 
 [test]
 testresources
 testscenarios
-unittest2>=1.1.0