diff --git a/testhal/NUMICRO/NUC123/NUTINY-SDK-NUC123-V2.0/SERIAL/cfg/mcuconf.h b/testhal/NUMICRO/NUC123/NUTINY-SDK-NUC123-V2.0/SERIAL/cfg/mcuconf.h
index 15a74bfa..e6030fc4 100644
--- a/testhal/NUMICRO/NUC123/NUTINY-SDK-NUC123-V2.0/SERIAL/cfg/mcuconf.h
+++ b/testhal/NUMICRO/NUC123/NUTINY-SDK-NUC123-V2.0/SERIAL/cfg/mcuconf.h
@@ -24,8 +24,6 @@
 /*
  * HAL driver system settings.
  */
-#define NUC123_HSE_ENABLED TRUE
-#define NUC123_PLL_ENABLED TRUE
 #define NUC123_SERIAL_CLKSRC NUC123_SERIAL_CLKSRC_HSI
 
 #define NUC123_MCUCONF