diff --git a/dev/test_mb_2024_2_mux_2024.py b/dev/test_mb_2024_2_mux_2024.py
index 27b0380156fabb8e828af61dfdfa6e2e8a0e7987..ec8371b55e01b5a8ad3b2d1be8dc675c6f8450e0 100644
--- a/dev/test_mb_2024_2_mux_2024.py
+++ b/dev/test_mb_2024_2_mux_2024.py
@@ -48,7 +48,7 @@ if stand_alone:
         MUX_CONFIG = HARDWARE_CONFIG['mux']['boards'][mux_id]
 
         MUX_CONFIG.update({'ctl': ctl, 'connection': MUX_CONFIG.pop('connection', ctl.interfaces[
-                                           MUX_CONFIG.pop('interface_name', 'i2c')]), 'exec_logger': ctl.exec_logger,
+                                           MUX_CONFIG.pop('interface_name', 'i2c_ext')]), 'exec_logger': ctl.exec_logger,
                        'soh_logger': ctl.soh_logger})
         MUX_CONFIG.update({'id': mux_id})
         mux = mux_module.Mux(**MUX_CONFIG)