diff --git a/test/unit/common/middleware/test_gatekeeper.py b/test/unit/common/middleware/test_gatekeeper.py
index 8c205afa31..888aeb6204 100644
--- a/test/unit/common/middleware/test_gatekeeper.py
+++ b/test/unit/common/middleware/test_gatekeeper.py
@@ -87,13 +87,11 @@ class TestGatekeeper(unittest.TestCase):
 
     def _assertHeadersEqual(self, expected, actual):
         for key in expected:
-            self.assertTrue(key.lower() in actual,
-                            '%s missing from %s' % (key, actual))
+            self.assertIn(key.lower(), actual)
 
     def _assertHeadersAbsent(self, unexpected, actual):
         for key in unexpected:
-            self.assertNotIn(key.lower(), actual,
-                             '%s is in %s' % (key, actual))
+            self.assertNotIn(key.lower(), actual)
 
     def get_app(self, app, global_conf, **local_conf):
         factory = gatekeeper.filter_factory(global_conf, **local_conf)
diff --git a/test/unit/common/middleware/test_proxy_logging.py b/test/unit/common/middleware/test_proxy_logging.py
index fa5d001c9b..cdeab51636 100644
--- a/test/unit/common/middleware/test_proxy_logging.py
+++ b/test/unit/common/middleware/test_proxy_logging.py
@@ -449,8 +449,8 @@ class TestProxyLogging(unittest.TestCase):
         [x for x in resp]
         log_parts = self._log_parts(app)
         headers = unquote(log_parts[14]).split('\n')
-        self.assertTrue('First: 1' in headers)
-        self.assertTrue('Second: 2' in headers)
+        self.assertIn('First: 1', headers)
+        self.assertIn('Second: 2', headers)
         self.assertNotIn('Third: 3', headers)
         self.assertNotIn('Host: localhost:80', headers)
 
diff --git a/test/unit/common/middleware/test_slo.py b/test/unit/common/middleware/test_slo.py
index 905755cf3b..7238aa70b5 100644
--- a/test/unit/common/middleware/test_slo.py
+++ b/test/unit/common/middleware/test_slo.py
@@ -513,8 +513,10 @@ class TestSloPutManifest(SloTestCase):
             body=test_json_data)
         self.assertNotIn('X-Static-Large-Object', req.headers)
         self.slo(req.environ, fake_start_response)
-        self.assertTrue('X-Static-Large-Object' in req.headers)
-        self.assertTrue(req.environ['PATH_INFO'], '/cont/object\xe2\x99\xa1')
+        self.assertIn('X-Static-Large-Object', req.headers)
+        self.assertEqual(req.environ['PATH_INFO'], '/v1/AUTH_test/c/man')
+        self.assertIn(('HEAD', '/v1/AUTH_test/cont/object\xe2\x99\xa1'),
+                      self.app.calls)
 
     def test_handle_multipart_put_no_xml(self):
         req = Request.blank(
diff --git a/test/unit/common/middleware/test_staticweb.py b/test/unit/common/middleware/test_staticweb.py
index d6f89a4870..e25028cc1d 100644
--- a/test/unit/common/middleware/test_staticweb.py
+++ b/test/unit/common/middleware/test_staticweb.py
@@ -554,8 +554,8 @@ class TestStaticWeb(unittest.TestCase):
         resp = Request.blank(
             '/v1/a/c3/subdir/').get_response(self.test_staticweb)
         self.assertEqual(resp.status_int, 200)
-        self.assertTrue('Listing of /v1/a/c3/subdir/' in resp.body)
-        self.assertTrue('</style>' in resp.body)
+        self.assertIn('Listing of /v1/a/c3/subdir/', resp.body)
+        self.assertIn('</style>', resp.body)
         self.assertNotIn('<link', resp.body)
         self.assertNotIn('listing.css', resp.body)
 
@@ -588,8 +588,8 @@ class TestStaticWeb(unittest.TestCase):
     def test_container4indexhtml(self):
         resp = Request.blank('/v1/a/c4/').get_response(self.test_staticweb)
         self.assertEqual(resp.status_int, 200)
-        self.assertTrue('Listing of /v1/a/c4/' in resp.body)
-        self.assertTrue('href="listing.css"' in resp.body)
+        self.assertIn('Listing of /v1/a/c4/', resp.body)
+        self.assertIn('href="listing.css"', resp.body)
 
     def test_container4indexhtmlauthed(self):
         resp = Request.blank('/v1/a/c4').get_response(self.test_staticweb)
@@ -609,16 +609,16 @@ class TestStaticWeb(unittest.TestCase):
         resp = Request.blank(
             '/v1/a/c4/unknown').get_response(self.test_staticweb)
         self.assertEqual(resp.status_int, 404)
-        self.assertTrue("Chrome's 404 fancy-page sucks." in resp.body)
+        self.assertIn("Chrome's 404 fancy-page sucks.", resp.body)
 
     def test_container4subdir(self):
         resp = Request.blank(
             '/v1/a/c4/subdir/').get_response(self.test_staticweb)
         self.assertEqual(resp.status_int, 200)
-        self.assertTrue('Listing of /v1/a/c4/subdir/' in resp.body)
+        self.assertIn('Listing of /v1/a/c4/subdir/', resp.body)
         self.assertNotIn('</style>', resp.body)
-        self.assertTrue('<link' in resp.body)
-        self.assertTrue('href="../listing.css"' in resp.body)
+        self.assertIn('<link', resp.body)
+        self.assertIn('href="../listing.css"', resp.body)
         self.assertEqual(resp.headers['content-type'],
                          'text/html; charset=UTF-8')
 
@@ -768,7 +768,7 @@ class TestStaticWeb(unittest.TestCase):
         resp = Request.blank('/v1/a/c11a/subdir/').get_response(
             self.test_staticweb)
         self.assertEqual(resp.status_int, 404)
-        self.assertTrue('Index File Not Found' in resp.body)
+        self.assertIn('Index File Not Found', resp.body)
 
     def test_container11subdirmarkeraltdirtype(self):
         resp = Request.blank('/v1/a/c11a/subdir2/').get_response(
@@ -784,20 +784,20 @@ class TestStaticWeb(unittest.TestCase):
         resp = Request.blank('/v1/a/c12/').get_response(
             self.test_staticweb)
         self.assertEqual(resp.status_int, 200)
-        self.assertTrue('index file' in resp.body)
+        self.assertIn('index file', resp.body)
 
     def test_container_404_has_css(self):
         resp = Request.blank('/v1/a/c13/').get_response(
             self.test_staticweb)
         self.assertEqual(resp.status_int, 404)
-        self.assertTrue('listing.css' in resp.body)
+        self.assertIn('listing.css', resp.body)
 
     def test_container_404_has_no_css(self):
         resp = Request.blank('/v1/a/c7/').get_response(
             self.test_staticweb)
         self.assertEqual(resp.status_int, 404)
         self.assertNotIn('listing.css', resp.body)
-        self.assertTrue('<style' in resp.body)
+        self.assertIn('<style', resp.body)
 
     def test_subrequest_once_if_possible(self):
         resp = Request.blank(
diff --git a/test/unit/common/middleware/test_tempurl.py b/test/unit/common/middleware/test_tempurl.py
index 1cab313738..5e05e64355 100644
--- a/test/unit/common/middleware/test_tempurl.py
+++ b/test/unit/common/middleware/test_tempurl.py
@@ -437,8 +437,8 @@ class TestTempURL(unittest.TestCase):
                          sig, expires)})
         resp = req.get_response(self.tempurl)
         self.assertEqual(resp.status_int, 401)
-        self.assertTrue('Temp URL invalid' in resp.body)
-        self.assertTrue('Www-Authenticate' in resp.headers)
+        self.assertIn('Temp URL invalid', resp.body)
+        self.assertIn('Www-Authenticate', resp.headers)
 
     def test_put_valid(self):
         method = 'PUT'
@@ -470,8 +470,8 @@ class TestTempURL(unittest.TestCase):
                 sig, expires)})
         resp = req.get_response(self.tempurl)
         self.assertEqual(resp.status_int, 401)
-        self.assertTrue('Temp URL invalid' in resp.body)
-        self.assertTrue('Www-Authenticate' in resp.headers)
+        self.assertIn('Temp URL invalid', resp.body)
+        self.assertIn('Www-Authenticate', resp.headers)
 
     def test_missing_sig(self):
         method = 'GET'
@@ -485,8 +485,8 @@ class TestTempURL(unittest.TestCase):
             environ={'QUERY_STRING': 'temp_url_expires=%s' % expires})
         resp = req.get_response(self.tempurl)
         self.assertEqual(resp.status_int, 401)
-        self.assertTrue('Temp URL invalid' in resp.body)
-        self.assertTrue('Www-Authenticate' in resp.headers)
+        self.assertIn('Temp URL invalid', resp.body)
+        self.assertIn('Www-Authenticate', resp.headers)
 
     def test_missing_expires(self):
         method = 'GET'
@@ -500,8 +500,8 @@ class TestTempURL(unittest.TestCase):
             environ={'QUERY_STRING': 'temp_url_sig=%s' % sig})
         resp = req.get_response(self.tempurl)
         self.assertEqual(resp.status_int, 401)
-        self.assertTrue('Temp URL invalid' in resp.body)
-        self.assertTrue('Www-Authenticate' in resp.headers)
+        self.assertIn('Temp URL invalid', resp.body)
+        self.assertIn('Www-Authenticate', resp.headers)
 
     def test_bad_path(self):
         method = 'GET'
@@ -516,8 +516,8 @@ class TestTempURL(unittest.TestCase):
                 sig, expires)})
         resp = req.get_response(self.tempurl)
         self.assertEqual(resp.status_int, 401)
-        self.assertTrue('Temp URL invalid' in resp.body)
-        self.assertTrue('Www-Authenticate' in resp.headers)
+        self.assertIn('Temp URL invalid', resp.body)
+        self.assertIn('Www-Authenticate', resp.headers)
 
     def test_no_key(self):
         method = 'GET'
@@ -532,8 +532,8 @@ class TestTempURL(unittest.TestCase):
                 sig, expires)})
         resp = req.get_response(self.tempurl)
         self.assertEqual(resp.status_int, 401)
-        self.assertTrue('Temp URL invalid' in resp.body)
-        self.assertTrue('Www-Authenticate' in resp.headers)
+        self.assertIn('Temp URL invalid', resp.body)
+        self.assertIn('Www-Authenticate', resp.headers)
 
     def test_head_allowed_by_get(self):
         method = 'GET'
@@ -603,7 +603,7 @@ class TestTempURL(unittest.TestCase):
                          sig, expires)})
         resp = req.get_response(self.tempurl)
         self.assertEqual(resp.status_int, 401)
-        self.assertTrue('Www-Authenticate' in resp.headers)
+        self.assertIn('Www-Authenticate', resp.headers)
 
     def test_post_when_forbidden_by_config(self):
         self.tempurl.conf['methods'].remove('POST')
@@ -620,8 +620,8 @@ class TestTempURL(unittest.TestCase):
                          sig, expires)})
         resp = req.get_response(self.tempurl)
         self.assertEqual(resp.status_int, 401)
-        self.assertTrue('Temp URL invalid' in resp.body)
-        self.assertTrue('Www-Authenticate' in resp.headers)
+        self.assertIn('Temp URL invalid', resp.body)
+        self.assertIn('Www-Authenticate', resp.headers)
 
     def test_delete_when_forbidden_by_config(self):
         self.tempurl.conf['methods'].remove('DELETE')
@@ -638,8 +638,8 @@ class TestTempURL(unittest.TestCase):
                          sig, expires)})
         resp = req.get_response(self.tempurl)
         self.assertEqual(resp.status_int, 401)
-        self.assertTrue('Temp URL invalid' in resp.body)
-        self.assertTrue('Www-Authenticate' in resp.headers)
+        self.assertIn('Temp URL invalid', resp.body)
+        self.assertIn('Www-Authenticate', resp.headers)
 
     def test_delete_allowed(self):
         method = 'DELETE'
@@ -670,8 +670,8 @@ class TestTempURL(unittest.TestCase):
                          sig, expires)})
         resp = req.get_response(self.tempurl)
         self.assertEqual(resp.status_int, 401)
-        self.assertTrue('Temp URL invalid' in resp.body)
-        self.assertTrue('Www-Authenticate' in resp.headers)
+        self.assertIn('Temp URL invalid', resp.body)
+        self.assertIn('Www-Authenticate', resp.headers)
 
     def test_authorize_limits_scope(self):
         req_other_object = Request.blank("/v1/a/c/o2")
@@ -761,8 +761,8 @@ class TestTempURL(unittest.TestCase):
                 sig, expires)})
         resp = req.get_response(self.tempurl)
         self.assertEqual(resp.status_int, 401)
-        self.assertTrue('Temp URL invalid' in resp.body)
-        self.assertTrue('Www-Authenticate' in resp.headers)
+        self.assertIn('Temp URL invalid', resp.body)
+        self.assertIn('Www-Authenticate', resp.headers)
 
     def test_changed_sig_invalid(self):
         method = 'GET'
@@ -781,8 +781,8 @@ class TestTempURL(unittest.TestCase):
                 sig, expires)})
         resp = req.get_response(self.tempurl)
         self.assertEqual(resp.status_int, 401)
-        self.assertTrue('Temp URL invalid' in resp.body)
-        self.assertTrue('Www-Authenticate' in resp.headers)
+        self.assertIn('Temp URL invalid', resp.body)
+        self.assertIn('Www-Authenticate', resp.headers)
 
     def test_changed_expires_invalid(self):
         method = 'GET'
@@ -797,8 +797,8 @@ class TestTempURL(unittest.TestCase):
                 sig, expires + 1)})
         resp = req.get_response(self.tempurl)
         self.assertEqual(resp.status_int, 401)
-        self.assertTrue('Temp URL invalid' in resp.body)
-        self.assertTrue('Www-Authenticate' in resp.headers)
+        self.assertIn('Temp URL invalid', resp.body)
+        self.assertIn('Www-Authenticate', resp.headers)
 
     def test_different_key_invalid(self):
         method = 'GET'
@@ -848,8 +848,8 @@ class TestTempURL(unittest.TestCase):
                      (sig, expires)})
         resp = req.get_response(self.tempurl)
         self.assertEqual(resp.status_int, 401)
-        self.assertTrue('Temp URL invalid' in resp.body)
-        self.assertTrue('Www-Authenticate' in resp.headers)
+        self.assertIn('Temp URL invalid', resp.body)
+        self.assertIn('Www-Authenticate', resp.headers)
 
     def test_disallowed_header_object_manifest(self):
         self.tempurl = tempurl.filter_factory({})(self.auth)
@@ -1168,7 +1168,7 @@ class TestTempURL(unittest.TestCase):
             self.tempurl)
         self.assertEqual(resp.status_int, 401)
         self.assertNotIn('Temp URL invalid', resp.body)
-        self.assertTrue('Www-Authenticate' in resp.headers)
+        self.assertIn('Www-Authenticate', resp.headers)
         self.assertNotIn('swift.auth_scheme', environ)
 
         # Rejected by TempURL
@@ -1179,8 +1179,8 @@ class TestTempURL(unittest.TestCase):
                                  environ=environ)
         resp = req.get_response(self.tempurl)
         self.assertEqual(resp.status_int, 401)
-        self.assertTrue('Temp URL invalid' in resp.body)
-        self.assertTrue('Www-Authenticate' in resp.headers)
+        self.assertIn('Temp URL invalid', resp.body)
+        self.assertIn('Www-Authenticate', resp.headers)
 
     def test_clean_incoming_headers(self):
         irh = []
@@ -1190,7 +1190,7 @@ class TestTempURL(unittest.TestCase):
             None, {'incoming_remove_headers': irh,
                    'incoming_allow_headers': iah}
         )._clean_incoming_headers(env)
-        self.assertTrue('HTTP_TEST_HEADER' in env)
+        self.assertIn('HTTP_TEST_HEADER', env)
 
         irh = ['test-header']
         iah = []
@@ -1221,7 +1221,7 @@ class TestTempURL(unittest.TestCase):
                    'incoming_allow_headers': iah}
         )._clean_incoming_headers(env)
         self.assertNotIn('HTTP_TEST_HEADER_ONE', env)
-        self.assertTrue('HTTP_TEST_HEADER_TWO' in env)
+        self.assertIn('HTTP_TEST_HEADER_TWO', env)
 
         irh = ['test-header-*', 'test-other-header']
         iah = ['test-header-two', 'test-header-yes-*']
@@ -1235,10 +1235,10 @@ class TestTempURL(unittest.TestCase):
                    'incoming_allow_headers': iah}
         )._clean_incoming_headers(env)
         self.assertNotIn('HTTP_TEST_HEADER_ONE', env)
-        self.assertTrue('HTTP_TEST_HEADER_TWO' in env)
+        self.assertIn('HTTP_TEST_HEADER_TWO', env)
         self.assertNotIn('HTTP_TEST_OTHER_HEADER', env)
         self.assertNotIn('HTTP_TEST_HEADER_YES', env)
-        self.assertTrue('HTTP_TEST_HEADER_YES_THIS' in env)
+        self.assertIn('HTTP_TEST_HEADER_YES_THIS', env)
 
     def test_clean_outgoing_headers(self):
         orh = []
@@ -1248,7 +1248,7 @@ class TestTempURL(unittest.TestCase):
             None,
             {'outgoing_remove_headers': orh, 'outgoing_allow_headers': oah}
         )._clean_outgoing_headers(hdrs.items()))
-        self.assertTrue('test-header' in hdrs)
+        self.assertIn('test-header', hdrs)
 
         orh = ['test-header']
         oah = []
@@ -1279,7 +1279,7 @@ class TestTempURL(unittest.TestCase):
             {'outgoing_remove_headers': orh, 'outgoing_allow_headers': oah}
         )._clean_outgoing_headers(hdrs.items()))
         self.assertNotIn('test-header-one', hdrs)
-        self.assertTrue('test-header-two' in hdrs)
+        self.assertIn('test-header-two', hdrs)
 
         orh = ['test-header-*', 'test-other-header']
         oah = ['test-header-two', 'test-header-yes-*']
@@ -1293,16 +1293,16 @@ class TestTempURL(unittest.TestCase):
             {'outgoing_remove_headers': orh, 'outgoing_allow_headers': oah}
         )._clean_outgoing_headers(hdrs.items()))
         self.assertNotIn('test-header-one', hdrs)
-        self.assertTrue('test-header-two' in hdrs)
+        self.assertIn('test-header-two', hdrs)
         self.assertNotIn('test-other-header', hdrs)
         self.assertNotIn('test-header-yes', hdrs)
-        self.assertTrue('test-header-yes-this' in hdrs)
+        self.assertIn('test-header-yes-this', hdrs)
 
     def test_unicode_metadata_value(self):
         meta = {"temp-url-key": "test", "temp-url-key-2": u"test2"}
         results = tempurl.get_tempurl_keys_from_metadata(meta)
         for str_value in results:
-            self.assertTrue(isinstance(str_value, str))
+            self.assertIsInstance(str_value, str)
 
 
 class TestSwiftInfo(unittest.TestCase):
@@ -1313,7 +1313,7 @@ class TestSwiftInfo(unittest.TestCase):
     def test_registered_defaults(self):
         tempurl.filter_factory({})
         swift_info = utils.get_swift_info()
-        self.assertTrue('tempurl' in swift_info)
+        self.assertIn('tempurl', swift_info)
         info = swift_info['tempurl']
         self.assertEqual(set(info['methods']),
                          set(('GET', 'HEAD', 'PUT', 'POST', 'DELETE')))
@@ -1334,7 +1334,7 @@ class TestSwiftInfo(unittest.TestCase):
             'outgoing_allow_headers': 'x-object-meta-* content-type',
         })
         swift_info = utils.get_swift_info()
-        self.assertTrue('tempurl' in swift_info)
+        self.assertIn('tempurl', swift_info)
         info = swift_info['tempurl']
         self.assertEqual(set(info['methods']),
                          set(('GET', 'HEAD', 'PUT', 'DELETE', 'BREW')))
diff --git a/test/unit/common/test_db.py b/test/unit/common/test_db.py
index 5e50d03cbf..f147b30562 100644
--- a/test/unit/common/test_db.py
+++ b/test/unit/common/test_db.py
@@ -51,14 +51,14 @@ class TestDatabaseConnectionError(unittest.TestCase):
     def test_str(self):
         err = \
             DatabaseConnectionError(':memory:', 'No valid database connection')
-        self.assertTrue(':memory:' in str(err))
-        self.assertTrue('No valid database connection' in str(err))
+        self.assertIn(':memory:', str(err))
+        self.assertIn('No valid database connection', str(err))
         err = DatabaseConnectionError(':memory:',
                                       'No valid database connection',
                                       timeout=1357)
-        self.assertTrue(':memory:' in str(err))
-        self.assertTrue('No valid database connection' in str(err))
-        self.assertTrue('1357' in str(err))
+        self.assertIn(':memory:', str(err))
+        self.assertIn('No valid database connection', str(err))
+        self.assertIn('1357', str(err))
 
 
 class TestDictFactory(unittest.TestCase):
@@ -607,7 +607,7 @@ class TestDatabaseBroker(unittest.TestCase):
         db_file = os.path.join(self.testdir, '1.db')
         broker = DatabaseBroker(db_file)
         self.assertEqual(broker.db_file, db_file)
-        self.assertTrue(broker.conn is None)
+        self.assertIsNone(broker.conn)
 
     def test_disk_preallocate(self):
         test_size = [-1]
@@ -676,7 +676,7 @@ class TestDatabaseBroker(unittest.TestCase):
         broker._initialize = init_stub
         # Initializes a good broker for us
         broker.initialize(normalize_timestamp('1'))
-        self.assertTrue(broker.conn is not None)
+        self.assertIsNotNone(broker.conn)
         broker._delete_db = delete_stub
         stub_called[0] = False
         broker.delete_db('2')
@@ -1077,58 +1077,58 @@ class TestDatabaseBroker(unittest.TestCase):
         first_timestamp = normalize_timestamp(1)
         first_value = '1'
         broker.update_metadata({'First': [first_value, first_timestamp]})
-        self.assertTrue('First' in broker.metadata)
+        self.assertIn('First', broker.metadata)
         self.assertEqual(broker.metadata['First'],
                          [first_value, first_timestamp])
         # Add our second item
         second_timestamp = normalize_timestamp(2)
         second_value = '2'
         broker.update_metadata({'Second': [second_value, second_timestamp]})
-        self.assertTrue('First' in broker.metadata)
+        self.assertIn('First', broker.metadata)
         self.assertEqual(broker.metadata['First'],
                          [first_value, first_timestamp])
-        self.assertTrue('Second' in broker.metadata)
+        self.assertIn('Second', broker.metadata)
         self.assertEqual(broker.metadata['Second'],
                          [second_value, second_timestamp])
         # Update our first item
         first_timestamp = normalize_timestamp(3)
         first_value = '1b'
         broker.update_metadata({'First': [first_value, first_timestamp]})
-        self.assertTrue('First' in broker.metadata)
+        self.assertIn('First', broker.metadata)
         self.assertEqual(broker.metadata['First'],
                          [first_value, first_timestamp])
-        self.assertTrue('Second' in broker.metadata)
+        self.assertIn('Second', broker.metadata)
         self.assertEqual(broker.metadata['Second'],
                          [second_value, second_timestamp])
         # Delete our second item (by setting to empty string)
         second_timestamp = normalize_timestamp(4)
         second_value = ''
         broker.update_metadata({'Second': [second_value, second_timestamp]})
-        self.assertTrue('First' in broker.metadata)
+        self.assertIn('First', broker.metadata)
         self.assertEqual(broker.metadata['First'],
                          [first_value, first_timestamp])
-        self.assertTrue('Second' in broker.metadata)
+        self.assertIn('Second', broker.metadata)
         self.assertEqual(broker.metadata['Second'],
                          [second_value, second_timestamp])
         # Reclaim at point before second item was deleted
         reclaim(broker, normalize_timestamp(3))
-        self.assertTrue('First' in broker.metadata)
+        self.assertIn('First', broker.metadata)
         self.assertEqual(broker.metadata['First'],
                          [first_value, first_timestamp])
-        self.assertTrue('Second' in broker.metadata)
+        self.assertIn('Second', broker.metadata)
         self.assertEqual(broker.metadata['Second'],
                          [second_value, second_timestamp])
         # Reclaim at point second item was deleted
         reclaim(broker, normalize_timestamp(4))
-        self.assertTrue('First' in broker.metadata)
+        self.assertIn('First', broker.metadata)
         self.assertEqual(broker.metadata['First'],
                          [first_value, first_timestamp])
-        self.assertTrue('Second' in broker.metadata)
+        self.assertIn('Second', broker.metadata)
         self.assertEqual(broker.metadata['Second'],
                          [second_value, second_timestamp])
         # Reclaim after point second item was deleted
         reclaim(broker, normalize_timestamp(5))
-        self.assertTrue('First' in broker.metadata)
+        self.assertIn('First', broker.metadata)
         self.assertEqual(broker.metadata['First'],
                          [first_value, first_timestamp])
         self.assertNotIn('Second', broker.metadata)
diff --git a/test/unit/common/test_direct_client.py b/test/unit/common/test_direct_client.py
index 7a1197a23a..a832f31c6f 100644
--- a/test/unit/common/test_direct_client.py
+++ b/test/unit/common/test_direct_client.py
@@ -529,8 +529,7 @@ class TestDirectClient(unittest.TestCase):
 
         self.assertEqual(conn.req_headers['user-agent'], self.user_agent)
         self.assertEqual('bar', conn.req_headers.get('x-foo'))
-        self.assertNotIn('x-timestamp', conn.req_headers,
-                         'x-timestamp was in HEAD request headers')
+        self.assertNotIn('x-timestamp', conn.req_headers)
         self.assertEqual(headers, resp)
 
     def test_direct_head_object_error(self):
diff --git a/test/unit/common/test_manager.py b/test/unit/common/test_manager.py
index bce66559f0..b36b53a667 100644
--- a/test/unit/common/test_manager.py
+++ b/test/unit/common/test_manager.py
@@ -484,7 +484,7 @@ class TestServer(unittest.TestCase):
                     # check verbose lists configs
                     conf_files = server.conf_files(number=2, verbose=True)
                     c1 = self.join_swift_dir('container-server/1.conf')
-                    self.assertTrue(c1 in pop_stream(f))
+                    self.assertIn(c1, pop_stream(f))
             finally:
                 sys.stdout = old_stdout
 
@@ -720,11 +720,11 @@ class TestServer(unittest.TestCase):
             server = manager.Server('proxy', run_dir=manager.RUN_DIR)
             pids = server.signal_pids(DUMMY_SIG)
             self.assertEqual(len(pids), 1)
-            self.assertTrue(1 in pids)
+            self.assertIn(1, pids)
             self.assertEqual(manager.os.pid_sigs[1], [DUMMY_SIG])
             # make sure other process not signaled
-            self.assertFalse(2 in pids)
-            self.assertFalse(2 in manager.os.pid_sigs)
+            self.assertNotIn(2, pids)
+            self.assertNotIn(2, manager.os.pid_sigs)
             # capture stdio
             old_stdout = sys.stdout
             try:
@@ -733,8 +733,8 @@ class TestServer(unittest.TestCase):
                     # test print details
                     pids = server.signal_pids(DUMMY_SIG)
                     output = pop_stream(f)
-                    self.assertTrue('pid: %s' % 1 in output)
-                    self.assertTrue('signal: %s' % DUMMY_SIG in output)
+                    self.assertIn('pid: %s' % 1, output)
+                    self.assertIn('signal: %s' % DUMMY_SIG, output)
                     # test no details on signal.SIG_DFL
                     pids = server.signal_pids(signal.SIG_DFL)
                     self.assertEqual(pop_stream(f), '')
@@ -818,7 +818,7 @@ class TestServer(unittest.TestCase):
             manager.os = MockOs([1, 3])
             running_pids = server.get_running_pids()
             self.assertEqual(len(running_pids), 1)
-            self.assertTrue(1 in running_pids)
+            self.assertIn(1, running_pids)
             self.assertNotIn(2, running_pids)
             self.assertNotIn(3, running_pids)
             # test persistent running pid files
@@ -855,7 +855,7 @@ class TestServer(unittest.TestCase):
             running_pids = server.get_running_pids()
             # only thing-doer.pid, 1
             self.assertEqual(len(running_pids), 1)
-            self.assertTrue(1 in running_pids)
+            self.assertIn(1, running_pids)
             # no other pids returned
             for n in (2, 3, 4):
                 self.assertNotIn(n, running_pids)
@@ -899,7 +899,7 @@ class TestServer(unittest.TestCase):
             # test kill one pid
             pids = server.kill_running_pids()
             self.assertEqual(len(pids), 1)
-            self.assertTrue(1 in pids)
+            self.assertIn(1, pids)
             self.assertEqual(manager.os.pid_sigs[1], [signal.SIGTERM])
             # reset os mock
             manager.os = MockOs([1])
@@ -908,7 +908,7 @@ class TestServer(unittest.TestCase):
                             manager.GRACEFUL_SHUTDOWN_SERVERS)
             pids = server.kill_running_pids(graceful=True)
             self.assertEqual(len(pids), 1)
-            self.assertTrue(1 in pids)
+            self.assertIn(1, pids)
             self.assertEqual(manager.os.pid_sigs[1], [signal.SIGHUP])
             # start up other servers
             manager.os = MockOs([11, 12])
@@ -1247,8 +1247,8 @@ class TestServer(unittest.TestCase):
                         server.procs = [proc]
                         status = server.wait(output=True)
                     output = pop_stream(f)
-                    self.assertTrue('mock process started' in output)
-                    self.assertTrue('setup complete' in output)
+                    self.assertIn('mock process started', output)
+                    self.assertIn('setup complete', output)
                     # make sure we don't get prints after stdout was closed
                     self.assertNotIn('mock process finished', output)
                     # test process which fails to start
@@ -1256,7 +1256,7 @@ class TestServer(unittest.TestCase):
                         server.procs = [proc]
                         status = server.wait()
                         self.assertEqual(status, 1)
-                    self.assertTrue('failed' in pop_stream(f))
+                    self.assertIn('failed', pop_stream(f))
                     # test multiple procs
                     procs = [MockProcess(delay=.5) for i in range(3)]
                     for proc in procs:
@@ -1390,7 +1390,7 @@ class TestServer(unittest.TestCase):
                             }
                             self.assertEqual(mock_spawn.kwargs, [expected])
                             output = pop_stream(f)
-                            self.assertTrue('Starting' in output)
+                            self.assertIn('Starting', output)
                             self.assertNotIn('once', output)
                         # test multi-server kwarg once
                         server = manager.Server('object-replicator')
diff --git a/test/unit/common/test_swob.py b/test/unit/common/test_swob.py
index b2ee485eea..8ed19c8ab5 100644
--- a/test/unit/common/test_swob.py
+++ b/test/unit/common/test_swob.py
@@ -268,21 +268,21 @@ class TestMatch(unittest.TestCase):
     def test_match(self):
         match = swift.common.swob.Match('"a", "b"')
         self.assertEqual(match.tags, set(('a', 'b')))
-        self.assertTrue('a' in match)
-        self.assertTrue('b' in match)
+        self.assertIn('a', match)
+        self.assertIn('b', match)
         self.assertNotIn('c', match)
 
     def test_match_star(self):
         match = swift.common.swob.Match('"a", "*"')
-        self.assertTrue('a' in match)
-        self.assertTrue('b' in match)
-        self.assertTrue('c' in match)
+        self.assertIn('a', match)
+        self.assertIn('b', match)
+        self.assertIn('c', match)
 
     def test_match_noquote(self):
         match = swift.common.swob.Match('a, b')
         self.assertEqual(match.tags, set(('a', 'b')))
-        self.assertTrue('a' in match)
-        self.assertTrue('b' in match)
+        self.assertIn('a', match)
+        self.assertIn('b', match)
         self.assertNotIn('c', match)
 
 
@@ -738,7 +738,7 @@ class TestRequest(unittest.TestCase):
         req.range = 'bytes=1-7'
         self.assertEqual(req.range.ranges[0], (1, 7))
 
-        self.assertTrue('Range' in req.headers)
+        self.assertIn('Range', req.headers)
         req.range = None
         self.assertNotIn('Range', req.headers)
 
@@ -755,7 +755,7 @@ class TestRequest(unittest.TestCase):
         self.assertEqual(req.headers['If-Unmodified-Since'], 'something')
         self.assertIsNone(req.if_unmodified_since)
 
-        self.assertTrue('If-Unmodified-Since' in req.headers)
+        self.assertIn('If-Unmodified-Since', req.headers)
         req.if_unmodified_since = None
         self.assertNotIn('If-Unmodified-Since', req.headers)
 
@@ -1026,12 +1026,12 @@ class TestResponse(unittest.TestCase):
 
         resp.location = 'something'
         self.assertEqual(resp.location, 'something')
-        self.assertTrue('Location' in resp.headers)
+        self.assertIn('Location', resp.headers)
         resp.location = None
         self.assertNotIn('Location', resp.headers)
 
         resp.content_type = 'text/plain'
-        self.assertTrue('Content-Type' in resp.headers)
+        self.assertIn('Content-Type', resp.headers)
         resp.content_type = None
         self.assertNotIn('Content-Type', resp.headers)
 
@@ -1377,7 +1377,7 @@ class TestResponse(unittest.TestCase):
         self.assertEqual(resp.headers['Etag'], '"hi"')
         self.assertEqual(resp.etag, 'hi')
 
-        self.assertTrue('etag' in resp.headers)
+        self.assertIn('etag', resp.headers)
         resp.etag = None
         self.assertNotIn('etag', resp.headers)
 
diff --git a/test/unit/common/test_utils.py b/test/unit/common/test_utils.py
index c71b59b62f..b0c8a2f9a1 100644
--- a/test/unit/common/test_utils.py
+++ b/test/unit/common/test_utils.py
@@ -1589,7 +1589,7 @@ class TestUtils(unittest.TestCase):
                 log_exception(OSError(en, 'my %s error message' % en))
                 log_msg = strip_value(sio)
                 self.assertNotIn('Traceback', log_msg)
-                self.assertTrue('my %s error message' % en in log_msg)
+                self.assertIn('my %s error message' % en, log_msg)
             # unfiltered
             log_exception(OSError())
             self.assertTrue('Traceback' in strip_value(sio))
@@ -1600,23 +1600,23 @@ class TestUtils(unittest.TestCase):
             log_msg = strip_value(sio)
             self.assertNotIn('Traceback', log_msg)
             self.assertNotIn('errno.ECONNREFUSED message test', log_msg)
-            self.assertTrue('Connection refused' in log_msg)
+            self.assertIn('Connection refused', log_msg)
             log_exception(socket.error(errno.EHOSTUNREACH,
                                        'my error message'))
             log_msg = strip_value(sio)
             self.assertNotIn('Traceback', log_msg)
             self.assertNotIn('my error message', log_msg)
-            self.assertTrue('Host unreachable' in log_msg)
+            self.assertIn('Host unreachable', log_msg)
             log_exception(socket.error(errno.ETIMEDOUT, 'my error message'))
             log_msg = strip_value(sio)
             self.assertNotIn('Traceback', log_msg)
             self.assertNotIn('my error message', log_msg)
-            self.assertTrue('Connection timeout' in log_msg)
+            self.assertIn('Connection timeout', log_msg)
             # unfiltered
             log_exception(socket.error(0, 'my error message'))
             log_msg = strip_value(sio)
-            self.assertTrue('Traceback' in log_msg)
-            self.assertTrue('my error message' in log_msg)
+            self.assertIn('Traceback', log_msg)
+            self.assertIn('my error message', log_msg)
 
             # test eventlet.Timeout
             connection_timeout = ConnectionTimeout(42, 'my error message')
@@ -1721,19 +1721,19 @@ class TestUtils(unittest.TestCase):
             self.assertFalse(logger.txn_id)
             logger.error('my error message')
             log_msg = strip_value(sio)
-            self.assertTrue('my error message' in log_msg)
+            self.assertIn('my error message', log_msg)
             self.assertNotIn('txn', log_msg)
             logger.txn_id = '12345'
             logger.error('test')
             log_msg = strip_value(sio)
-            self.assertTrue('txn' in log_msg)
-            self.assertTrue('12345' in log_msg)
+            self.assertIn('txn', log_msg)
+            self.assertIn('12345', log_msg)
             # test txn in info message
             self.assertEqual(logger.txn_id, '12345')
             logger.info('test')
             log_msg = strip_value(sio)
-            self.assertTrue('txn' in log_msg)
-            self.assertTrue('12345' in log_msg)
+            self.assertIn('txn', log_msg)
+            self.assertIn('12345', log_msg)
             # test txn already in message
             self.assertEqual(logger.txn_id, '12345')
             logger.warning('test 12345 test')
@@ -1741,19 +1741,19 @@ class TestUtils(unittest.TestCase):
             # Test multi line collapsing
             logger.error('my\nerror\nmessage')
             log_msg = strip_value(sio)
-            self.assertTrue('my#012error#012message' in log_msg)
+            self.assertIn('my#012error#012message', log_msg)
 
             # test client_ip
             self.assertFalse(logger.client_ip)
             logger.error('my error message')
             log_msg = strip_value(sio)
-            self.assertTrue('my error message' in log_msg)
+            self.assertIn('my error message', log_msg)
             self.assertNotIn('client_ip', log_msg)
             logger.client_ip = '1.2.3.4'
             logger.error('test')
             log_msg = strip_value(sio)
-            self.assertTrue('client_ip' in log_msg)
-            self.assertTrue('1.2.3.4' in log_msg)
+            self.assertIn('client_ip', log_msg)
+            self.assertIn('1.2.3.4', log_msg)
             # test no client_ip on info message
             self.assertEqual(logger.client_ip, '1.2.3.4')
             logger.info('test')
@@ -4187,12 +4187,12 @@ class TestSwiftInfo(unittest.TestCase):
 
         self.assertNotIn('admin', info)
 
-        self.assertTrue('swift' in info)
-        self.assertTrue('foo' in info['swift'])
+        self.assertIn('swift', info)
+        self.assertIn('foo', info['swift'])
         self.assertEqual(utils._swift_info['swift']['foo'], 'bar')
 
-        self.assertTrue('cap1' in info)
-        self.assertTrue('cap1_foo' in info['cap1'])
+        self.assertIn('cap1', info)
+        self.assertIn('cap1_foo', info['cap1'])
         self.assertEqual(utils._swift_info['cap1']['cap1_foo'], 'cap1_bar')
 
     def test_get_swift_info_with_disallowed_sections(self):
@@ -4206,14 +4206,14 @@ class TestSwiftInfo(unittest.TestCase):
 
         self.assertNotIn('admin', info)
 
-        self.assertTrue('swift' in info)
-        self.assertTrue('foo' in info['swift'])
+        self.assertIn('swift', info)
+        self.assertIn('foo', info['swift'])
         self.assertEqual(info['swift']['foo'], 'bar')
 
         self.assertNotIn('cap1', info)
 
-        self.assertTrue('cap2' in info)
-        self.assertTrue('cap2_foo' in info['cap2'])
+        self.assertIn('cap2', info)
+        self.assertIn('cap2_foo', info['cap2'])
         self.assertEqual(info['cap2']['cap2_foo'], 'cap2_bar')
 
         self.assertNotIn('cap3', info)
@@ -4224,19 +4224,19 @@ class TestSwiftInfo(unittest.TestCase):
         utils.register_swift_info('cap1', admin=True, ac1_foo='ac1_bar')
         utils.register_swift_info('cap1', admin=True, ac1_lorem='ac1_ipsum')
 
-        self.assertTrue('swift' in utils._swift_admin_info)
-        self.assertTrue('admin_foo' in utils._swift_admin_info['swift'])
+        self.assertIn('swift', utils._swift_admin_info)
+        self.assertIn('admin_foo', utils._swift_admin_info['swift'])
         self.assertEqual(
             utils._swift_admin_info['swift']['admin_foo'], 'admin_bar')
-        self.assertTrue('admin_lorem' in utils._swift_admin_info['swift'])
+        self.assertIn('admin_lorem', utils._swift_admin_info['swift'])
         self.assertEqual(
             utils._swift_admin_info['swift']['admin_lorem'], 'admin_ipsum')
 
-        self.assertTrue('cap1' in utils._swift_admin_info)
-        self.assertTrue('ac1_foo' in utils._swift_admin_info['cap1'])
+        self.assertIn('cap1', utils._swift_admin_info)
+        self.assertIn('ac1_foo', utils._swift_admin_info['cap1'])
         self.assertEqual(
             utils._swift_admin_info['cap1']['ac1_foo'], 'ac1_bar')
-        self.assertTrue('ac1_lorem' in utils._swift_admin_info['cap1'])
+        self.assertIn('ac1_lorem', utils._swift_admin_info['cap1'])
         self.assertEqual(
             utils._swift_admin_info['cap1']['ac1_lorem'], 'ac1_ipsum')
 
@@ -4250,17 +4250,17 @@ class TestSwiftInfo(unittest.TestCase):
 
         info = utils.get_swift_info(admin=True)
 
-        self.assertTrue('admin' in info)
-        self.assertTrue('admin_cap1' in info['admin'])
-        self.assertTrue('ac1_foo' in info['admin']['admin_cap1'])
+        self.assertIn('admin', info)
+        self.assertIn('admin_cap1', info['admin'])
+        self.assertIn('ac1_foo', info['admin']['admin_cap1'])
         self.assertEqual(info['admin']['admin_cap1']['ac1_foo'], 'ac1_bar')
 
-        self.assertTrue('swift' in info)
-        self.assertTrue('foo' in info['swift'])
+        self.assertIn('swift', info)
+        self.assertIn('foo', info['swift'])
         self.assertEqual(utils._swift_info['swift']['foo'], 'bar')
 
-        self.assertTrue('cap1' in info)
-        self.assertTrue('cap1_foo' in info['cap1'])
+        self.assertIn('cap1', info)
+        self.assertIn('cap1_foo', info['cap1'])
         self.assertEqual(utils._swift_info['cap1']['cap1_foo'], 'cap1_bar')
 
     def test_get_swift_admin_info_with_disallowed_sections(self):
@@ -4273,23 +4273,23 @@ class TestSwiftInfo(unittest.TestCase):
         info = utils.get_swift_info(
             admin=True, disallowed_sections=['cap1', 'cap3'])
 
-        self.assertTrue('admin' in info)
-        self.assertTrue('admin_cap1' in info['admin'])
-        self.assertTrue('ac1_foo' in info['admin']['admin_cap1'])
+        self.assertIn('admin', info)
+        self.assertIn('admin_cap1', info['admin'])
+        self.assertIn('ac1_foo', info['admin']['admin_cap1'])
         self.assertEqual(info['admin']['admin_cap1']['ac1_foo'], 'ac1_bar')
-        self.assertTrue('disallowed_sections' in info['admin'])
-        self.assertTrue('cap1' in info['admin']['disallowed_sections'])
+        self.assertIn('disallowed_sections', info['admin'])
+        self.assertIn('cap1', info['admin']['disallowed_sections'])
         self.assertNotIn('cap2', info['admin']['disallowed_sections'])
-        self.assertTrue('cap3' in info['admin']['disallowed_sections'])
+        self.assertIn('cap3', info['admin']['disallowed_sections'])
 
-        self.assertTrue('swift' in info)
-        self.assertTrue('foo' in info['swift'])
+        self.assertIn('swift', info)
+        self.assertIn('foo', info['swift'])
         self.assertEqual(info['swift']['foo'], 'bar')
 
         self.assertNotIn('cap1', info)
 
-        self.assertTrue('cap2' in info)
-        self.assertTrue('cap2_foo' in info['cap2'])
+        self.assertIn('cap2', info)
+        self.assertIn('cap2_foo', info['cap2'])
         self.assertEqual(info['cap2']['cap2_foo'], 'cap2_bar')
 
         self.assertNotIn('cap3', info)