diff --git a/setup.cfg b/setup.cfg
index da7180ac..c0cfe0bf 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -12,7 +12,6 @@ max-line-length = 88
 
 [mypy]
 python_version = 3.6
-namespace_packages = True
 no_implicit_optional = True
 
 [tool:pytest]
diff --git a/tests/integ_tests/__init__.py b/tests/integ_tests/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/tests/integ_tests/integ_test.py b/tests/integ_tests/integ_test.py
index 3070c6aa..18f6e53b 100644
--- a/tests/integ_tests/integ_test.py
+++ b/tests/integ_tests/integ_test.py
@@ -52,6 +52,8 @@ async def test_integ_configs(
 
     config = read_config_yaml(config_file)
     controller = get_controller(config["module"], config["class"])
+    if controller is None:
+        raise ValueError(f"`{config['class']}` class controller does not exist")
     controller.args = config
 
     fake_entity_states = get_fake_entity_states(entity_state, entity_state_attributes)
diff --git a/tests/unit_tests/cx_core/feature_support/__init__.py b/tests/unit_tests/cx_core/feature_support/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/tests/unit_tests/cx_core/stepper/__init__.py b/tests/unit_tests/cx_core/stepper/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/tests/unit_tests/cx_devices/__init__.py b/tests/unit_tests/cx_devices/__init__.py
new file mode 100644
index 00000000..e69de29b