diff --git a/tests/components/modbus/conftest.py b/tests/components/modbus/conftest.py
index 4fdda5d9aea..e470f30fe82 100644
--- a/tests/components/modbus/conftest.py
+++ b/tests/components/modbus/conftest.py
@@ -11,7 +11,14 @@ from pymodbus.exceptions import ModbusException
 import pytest
 
 from homeassistant.components.modbus.const import MODBUS_DOMAIN as DOMAIN, TCP
-from homeassistant.const import CONF_HOST, CONF_NAME, CONF_PORT, CONF_TYPE
+from homeassistant.const import (
+    CONF_ADDRESS,
+    CONF_HOST,
+    CONF_NAME,
+    CONF_PORT,
+    CONF_SENSORS,
+    CONF_TYPE,
+)
 from homeassistant.core import HomeAssistant
 from homeassistant.setup import async_setup_component
 import homeassistant.util.dt as dt_util
@@ -101,6 +108,12 @@ async def mock_modbus_fixture(
                 CONF_HOST: TEST_MODBUS_HOST,
                 CONF_PORT: TEST_PORT_TCP,
                 CONF_NAME: TEST_MODBUS_NAME,
+                CONF_SENSORS: [
+                    {
+                        CONF_NAME: "dummy",
+                        CONF_ADDRESS: 9999,
+                    }
+                ],
                 **conf,
             }
         ]
diff --git a/tests/components/modbus/test_init.py b/tests/components/modbus/test_init.py
index c3a4c35433b..3101f2d3376 100644
--- a/tests/components/modbus/test_init.py
+++ b/tests/components/modbus/test_init.py
@@ -362,6 +362,12 @@ async def test_exception_struct_validator(do_config) -> None:
                 CONF_HOST: TEST_MODBUS_HOST,
                 CONF_PORT: TEST_PORT_TCP,
                 CONF_TIMEOUT: 3,
+                CONF_SENSORS: [
+                    {
+                        CONF_NAME: "dummy",
+                        CONF_ADDRESS: 9999,
+                    }
+                ],
             },
             {
                 CONF_NAME: TEST_MODBUS_NAME,
@@ -369,6 +375,12 @@ async def test_exception_struct_validator(do_config) -> None:
                 CONF_HOST: TEST_MODBUS_HOST + " 2",
                 CONF_PORT: TEST_PORT_TCP,
                 CONF_TIMEOUT: 3,
+                CONF_SENSORS: [
+                    {
+                        CONF_NAME: "dummy",
+                        CONF_ADDRESS: 9999,
+                    }
+                ],
             },
             {
                 CONF_NAME: TEST_MODBUS_NAME + "2",
@@ -376,6 +388,12 @@ async def test_exception_struct_validator(do_config) -> None:
                 CONF_HOST: TEST_MODBUS_HOST,
                 CONF_PORT: TEST_PORT_TCP,
                 CONF_TIMEOUT: 3,
+                CONF_SENSORS: [
+                    {
+                        CONF_NAME: "dummy",
+                        CONF_ADDRESS: 9999,
+                    }
+                ],
             },
         ],
         [
@@ -384,6 +402,12 @@ async def test_exception_struct_validator(do_config) -> None:
                 CONF_HOST: TEST_MODBUS_HOST,
                 CONF_PORT: TEST_PORT_TCP,
                 CONF_TIMEOUT: 3,
+                CONF_SENSORS: [
+                    {
+                        CONF_NAME: "dummy",
+                        CONF_ADDRESS: 9999,
+                    }
+                ],
             },
             {
                 CONF_NAME: TEST_MODBUS_NAME + " 2",
@@ -391,6 +415,12 @@ async def test_exception_struct_validator(do_config) -> None:
                 CONF_HOST: TEST_MODBUS_HOST,
                 CONF_PORT: TEST_PORT_TCP,
                 CONF_TIMEOUT: 3,
+                CONF_SENSORS: [
+                    {
+                        CONF_NAME: "dummy",
+                        CONF_ADDRESS: 9999,
+                    }
+                ],
             },
         ],
     ],
@@ -1093,6 +1123,12 @@ SERVICE = "service"
             CONF_PORT: TEST_PORT_SERIAL,
             CONF_PARITY: "E",
             CONF_STOPBITS: 1,
+            CONF_SENSORS: [
+                {
+                    CONF_NAME: "dummy",
+                    CONF_ADDRESS: 9999,
+                }
+            ],
         },
     ],
 )
@@ -1287,6 +1323,12 @@ async def test_pymodbus_constructor_fail(
                 CONF_TYPE: TCP,
                 CONF_HOST: TEST_MODBUS_HOST,
                 CONF_PORT: TEST_PORT_TCP,
+                CONF_SENSORS: [
+                    {
+                        CONF_NAME: "dummy",
+                        CONF_ADDRESS: 9999,
+                    },
+                ],
             }
         ]
     }