diff --git a/tests/broker/test_broker.py b/tests/broker/test_broker.py
index b2ba279..ccd0ac4 100644
--- a/tests/broker/test_broker.py
+++ b/tests/broker/test_broker.py
@@ -1,5 +1,6 @@
 import tempfile
 import time
+import typing
 import unittest
 import unittest.mock
 
@@ -9,7 +10,13 @@
 import sergeant.objects
 
 
-class BrokerTestCase:
+class BrokerTestCase(
+    unittest.TestCase,
+):
+    __test__ = False
+
+    test_broker: sergeant.broker.Broker
+    test_brokers: typing.List[sergeant.broker.Broker]
     tasks = [
         sergeant.objects.Task(
             kwargs={
@@ -567,8 +574,9 @@ def test_lock(
 
 class RedisSingleServerBrokerTestCase(
     BrokerTestCase,
-    unittest.TestCase,
 ):
+    __test__ = True
+
     @classmethod
     def setUpClass(
         cls,
@@ -613,8 +621,9 @@ def setUpClass(
 
 class RedisMultipleServerBrokerTestCase(
     BrokerTestCase,
-    unittest.TestCase,
 ):
+    __test__ = True
+
     @classmethod
     def setUpClass(
         cls,
@@ -665,8 +674,9 @@ def setUpClass(
 
 class MongoSingleServerConnectorTestCase(
     BrokerTestCase,
-    unittest.TestCase,
 ):
+    __test__ = True
+
     @classmethod
     def setUpClass(
         cls,
@@ -710,8 +720,9 @@ def setUpClass(
 
 class MongoMultipleServersConnectorTestCase(
     BrokerTestCase,
-    unittest.TestCase,
 ):
+    __test__ = True
+
     @classmethod
     def setUpClass(
         cls,
@@ -760,8 +771,9 @@ def setUpClass(
 
 class LocalBrokerTestCase(
     BrokerTestCase,
-    unittest.TestCase,
 ):
+    __test__ = True
+
     @classmethod
     def setUpClass(
         cls,
diff --git a/tests/connector/test_connector.py b/tests/connector/test_connector.py
index 63f73f2..98797db 100644
--- a/tests/connector/test_connector.py
+++ b/tests/connector/test_connector.py
@@ -5,7 +5,12 @@
 import sergeant.connector
 
 
-class ConnectorTestCase:
+class ConnectorTestCase(
+    unittest.TestCase,
+):
+    __test__ = False
+
+    connector: sergeant.connector._connector.Connector
     test_queue_name = 'test_queue_name'
     test_queue_item = b'test_queue_item'
     test_queue_items = [
@@ -668,8 +673,9 @@ def test_queue_consumable(
 
 class RedisSingleServerConnectorTestCase(
     ConnectorTestCase,
-    unittest.TestCase,
 ):
+    __test__ = True
+
     def setUp(
         self,
     ):
@@ -687,8 +693,9 @@ def setUp(
 
 class RedisMultipleServersConnectorTestCase(
     ConnectorTestCase,
-    unittest.TestCase,
 ):
+    __test__ = True
+
     def setUp(
         self,
     ):
@@ -712,8 +719,9 @@ def setUp(
 
 class MongoSingleServerConnectorTestCase(
     ConnectorTestCase,
-    unittest.TestCase,
 ):
+    __test__ = True
+
     def setUp(
         self,
     ):
@@ -730,8 +738,9 @@ def setUp(
 
 class MongoMultipleServersConnectorTestCase(
     ConnectorTestCase,
-    unittest.TestCase,
 ):
+    __test__ = True
+
     def setUp(
         self,
     ):
@@ -753,8 +762,9 @@ def setUp(
 
 class LocalConnectorTestCase(
     ConnectorTestCase,
-    unittest.TestCase,
 ):
+    __test__ = True
+
     def setUp(
         self,
     ):
diff --git a/tests/worker/test_initializers.py b/tests/worker/test_initializers.py
index 612e070..082bed3 100644
--- a/tests/worker/test_initializers.py
+++ b/tests/worker/test_initializers.py
@@ -1,6 +1,11 @@
 import unittest
 import unittest.mock
 
+import sergeant.broker
+import sergeant.config
+import sergeant.connector
+import sergeant.encoder
+import sergeant.logging
 import sergeant.worker
 
 
@@ -13,10 +18,6 @@ def test_init_logger(
         worker = sergeant.worker.Worker()
         worker.config = sergeant.config.WorkerConfig(
             name='some_worker',
-            connector=sergeant.config.Connector(
-                type='',
-                params={},
-            ),
         )
 
         worker.init_logger()
@@ -26,10 +27,6 @@ def test_init_logger(
 
         worker.config = sergeant.config.WorkerConfig(
             name='some_worker',
-            connector=sergeant.config.Connector(
-                type='',
-                params={},
-            ),
             logging=sergeant.config.Logging(
                 handlers=[
                     sergeant.logging.logstash.LogstashHandler(
@@ -214,10 +211,6 @@ def test_init_executor(
         worker = sergeant.worker.Worker()
         worker.config = sergeant.config.WorkerConfig(
             name='some_worker',
-            connector=sergeant.config.Connector(
-                type='',
-                params={},
-            ),
         )
         worker.init_executor()
         self.assertIsInstance(
@@ -227,10 +220,6 @@ def test_init_executor(
 
         worker.config = sergeant.config.WorkerConfig(
             name='some_worker',
-            connector=sergeant.config.Connector(
-                type='',
-                params={},
-            ),
             number_of_threads=1,
         )
         worker.init_executor()
@@ -241,10 +230,6 @@ def test_init_executor(
 
         worker.config = sergeant.config.WorkerConfig(
             name='some_worker',
-            connector=sergeant.config.Connector(
-                type='',
-                params={},
-            ),
             number_of_threads=2,
         )
         worker.init_executor()