diff --git a/tests/minimalmodbus_test.py b/tests/minimalmodbus_test.py
index ca5a1ae..5bb9eeb 100755
--- a/tests/minimalmodbus_test.py
+++ b/tests/minimalmodbus_test.py
@@ -3,7 +3,7 @@ from time import sleep
 import minimalmodbus
 import serial
 
-slave_address = 0x11
+slave_address = 254
 instrument = minimalmodbus.Instrument('/dev/ttyUSB0', slave_address, close_port_after_each_call=True)  # port name, slave address (in decimal)
 
 instrument.serial.baudrate = 115200