diff --git a/tests/components/modbus/conftest.py b/tests/components/modbus/conftest.py
index 7f67a0653fb..43221b219e5 100644
--- a/tests/components/modbus/conftest.py
+++ b/tests/components/modbus/conftest.py
@@ -97,12 +97,9 @@ async def base_test(
 
     mock_sync = mock.MagicMock()
     with mock.patch(
-        "homeassistant.components.modbus.modbus.ModbusTcpClient", return_value=mock_sync
-    ), mock.patch(
-        "homeassistant.components.modbus.modbus.ModbusSerialClient",
+        "homeassistant.components.modbus.modbus.ModbusTcpClient",
+        autospec=True,
         return_value=mock_sync,
-    ), mock.patch(
-        "homeassistant.components.modbus.modbus.ModbusUdpClient", return_value=mock_sync
     ):
 
         # Setup inputs for the sensor