diff --git a/tests/components/twinkly/test_config_flow.py b/tests/components/twinkly/test_config_flow.py
index a65a2a2d96383f..4ddc0d4c1953ed 100644
--- a/tests/components/twinkly/test_config_flow.py
+++ b/tests/components/twinkly/test_config_flow.py
@@ -76,7 +76,7 @@ async def test_dhcp_can_confirm(hass: HomeAssistant) -> None:
             data=dhcp.DhcpServiceInfo(
                 hostname="Twinkly_XYZ",
                 ip="1.2.3.4",
-                macaddress="aa:bb:cc:dd:ee:ff",
+                macaddress="aabbccddeeff",
             ),
         )
         await hass.async_block_till_done()
@@ -97,7 +97,7 @@ async def test_dhcp_success(hass: HomeAssistant) -> None:
             data=dhcp.DhcpServiceInfo(
                 hostname="Twinkly_XYZ",
                 ip="1.2.3.4",
-                macaddress="aa:bb:cc:dd:ee:ff",
+                macaddress="aabbccddeeff",
             ),
         )
         await hass.async_block_till_done()
@@ -142,7 +142,7 @@ async def test_dhcp_already_exists(hass: HomeAssistant) -> None:
             data=dhcp.DhcpServiceInfo(
                 hostname="Twinkly_XYZ",
                 ip="1.2.3.4",
-                macaddress="aa:bb:cc:dd:ee:ff",
+                macaddress="aabbccddeeff",
             ),
         )
         await hass.async_block_till_done()