diff --git a/tests/components/esphome/test_config_flow.py b/tests/components/esphome/test_config_flow.py
index 04f8dc9e5aa..9b07f9b4ee0 100644
--- a/tests/components/esphome/test_config_flow.py
+++ b/tests/components/esphome/test_config_flow.py
@@ -1128,7 +1128,7 @@ async def test_discovery_dhcp_no_changes(
     service_info = dhcp.DhcpServiceInfo(
         ip="192.168.43.183",
         hostname="test8266",
-        macaddress="00:00:00:00:00:00",
+        macaddress="000000000000",
     )
     result = await hass.config_entries.flow.async_init(
         "esphome", context={"source": config_entries.SOURCE_DHCP}, data=service_info