diff --git a/tests/test_485_fuzz.py b/tests/test_485_fuzz.py
old mode 100644
new mode 100755
index 687783e..96029a4
--- a/tests/test_485_fuzz.py
+++ b/tests/test_485_fuzz.py
@@ -8,7 +8,22 @@
 #
 # Return 0 if read was successful, 1 otherwise.
 #
+import time
 import serial
 import minimalmodbus
+import numpy as np
+from sensor import Sensor
 
+serial_file = '/dev/rs485'
+address = 247
+baudrate = 19200
 
+serial_device = serial.Serial(serial_file, baudrate)
+# repeatedly write random stuff
+print('Sending random data to sensor')
+for i in range(0,16):
+    random_data = np.random.randint(256, size=(1024)).astype('uint8')
+    bytes_sent = serial_device.write(random_data)
+    if bytes_sent != len(random_data):
+        print(f'Warning: failed to write all bytes (sent {bytes_sent}/{len_random_data})')
+    time.sleep(0.05)