diff --git a/tests/components/homematicip_cloud/helper.py b/tests/components/homematicip_cloud/helper.py
index 4632b9107af..f82880d3fa8 100644
--- a/tests/components/homematicip_cloud/helper.py
+++ b/tests/components/homematicip_cloud/helper.py
@@ -84,7 +84,7 @@ class HomeFactory:
         self.hmip_config_entry = hmip_config_entry
 
     async def async_get_mock_hap(
-        self, test_devices=[], test_groups=[]
+        self, test_devices=None, test_groups=None
     ) -> HomematicipHAP:
         """Create a mocked homematic access point."""
         home_name = self.hmip_config_entry.data["name"]
@@ -130,7 +130,9 @@ class HomeTemplate(Home):
     _typeGroupMap = TYPE_GROUP_MAP
     _typeSecurityEventMap = TYPE_SECURITY_EVENT_MAP
 
-    def __init__(self, connection=None, home_name="", test_devices=[], test_groups=[]):
+    def __init__(
+        self, connection=None, home_name="", test_devices=None, test_groups=None
+    ):
         """Init template with connection."""
         super().__init__(connection=connection)
         self.name = home_name