diff --git a/tests/components/nuki/mock.py b/tests/components/nuki/mock.py
index e85d1de3933..56297240331 100644
--- a/tests/components/nuki/mock.py
+++ b/tests/components/nuki/mock.py
@@ -5,6 +5,7 @@ from tests.common import MockConfigEntry
 NAME = "Nuki_Bridge_75BCD15"
 HOST = "1.1.1.1"
 MAC = "01:23:45:67:89:ab"
+DHCP_FORMATTED_MAC = "0123456789ab"
 
 HW_ID = 123456789
 ID_HEX = "75BCD15"
diff --git a/tests/components/nuki/test_config_flow.py b/tests/components/nuki/test_config_flow.py
index 4079f21b1fe..b5f1b65af71 100644
--- a/tests/components/nuki/test_config_flow.py
+++ b/tests/components/nuki/test_config_flow.py
@@ -10,7 +10,7 @@ from homeassistant.components.nuki.const import DOMAIN
 from homeassistant.const import CONF_TOKEN
 from homeassistant.core import HomeAssistant
 
-from .mock import HOST, MAC, MOCK_INFO, NAME, setup_nuki_integration
+from .mock import DHCP_FORMATTED_MAC, HOST, MOCK_INFO, NAME, setup_nuki_integration
 
 
 async def test_form(hass: HomeAssistant) -> None:
@@ -146,7 +146,9 @@ async def test_dhcp_flow(hass: HomeAssistant) -> None:
     """Test that DHCP discovery for new bridge works."""
     result = await hass.config_entries.flow.async_init(
         DOMAIN,
-        data=dhcp.DhcpServiceInfo(hostname=NAME, ip=HOST, macaddress=MAC),
+        data=dhcp.DhcpServiceInfo(
+            hostname=NAME, ip=HOST, macaddress=DHCP_FORMATTED_MAC
+        ),
         context={"source": config_entries.SOURCE_DHCP},
     )
 
@@ -186,7 +188,9 @@ async def test_dhcp_flow_already_configured(hass: HomeAssistant) -> None:
     await setup_nuki_integration(hass)
     result = await hass.config_entries.flow.async_init(
         DOMAIN,
-        data=dhcp.DhcpServiceInfo(hostname=NAME, ip=HOST, macaddress=MAC),
+        data=dhcp.DhcpServiceInfo(
+            hostname=NAME, ip=HOST, macaddress=DHCP_FORMATTED_MAC
+        ),
         context={"source": config_entries.SOURCE_DHCP},
     )