diff --git a/tests/components/palazzetti/test_config_flow.py b/tests/components/palazzetti/test_config_flow.py
index 8550f1a3de0..65e1025da70 100644
--- a/tests/components/palazzetti/test_config_flow.py
+++ b/tests/components/palazzetti/test_config_flow.py
@@ -102,7 +102,7 @@ async def test_dhcp_flow(
     result = await hass.config_entries.flow.async_init(
         DOMAIN,
         data=DhcpServiceInfo(
-            hostname="connbox1234", ip="192.168.1.1", macaddress="11:22:33:44:55:66"
+            hostname="connbox1234", ip="192.168.1.1", macaddress="112233445566"
         ),
         context={"source": SOURCE_DHCP},
     )
@@ -131,7 +131,7 @@ async def test_dhcp_flow_error(
     result = await hass.config_entries.flow.async_init(
         DOMAIN,
         data=DhcpServiceInfo(
-            hostname="connbox1234", ip="192.168.1.1", macaddress="11:22:33:44:55:66"
+            hostname="connbox1234", ip="192.168.1.1", macaddress="112233445566"
         ),
         context={"source": SOURCE_DHCP},
     )