diff --git a/testhal/STM32F1xx/EXT_WAKEUP/halconf.h b/testhal/STM32F1xx/EXT_WAKEUP/halconf.h
index ca1d81b24..eb7142f50 100644
--- a/testhal/STM32F1xx/EXT_WAKEUP/halconf.h
+++ b/testhal/STM32F1xx/EXT_WAKEUP/halconf.h
@@ -289,7 +289,7 @@
  *          default configuration.
  */
 #if !defined(SERIAL_DEFAULT_BITRATE) || defined(__DOXYGEN__)
-#define SERIAL_DEFAULT_BITRATE      38400
+#define SERIAL_DEFAULT_BITRATE      115200
 #endif
 
 /**
diff --git a/testhal/STM32F1xx/EXT_WAKEUP/main.c b/testhal/STM32F1xx/EXT_WAKEUP/main.c
index f12a54207..3d6464ee7 100644
--- a/testhal/STM32F1xx/EXT_WAKEUP/main.c
+++ b/testhal/STM32F1xx/EXT_WAKEUP/main.c
@@ -102,7 +102,8 @@ static void cmd_sleep(BaseChannel *chp, int argc, char *argv[]){
   extChannelEnable(&EXTD1, 10);
   chThdSleepMilliseconds(5);
 
-  PWR->CR |= (PWR_CR_CSBF | PWR_CR_CWUF);
+  PWR->CR |= (PWR_CR_LPDS | PWR_CR_CSBF | PWR_CR_CWUF);
+  PWR->CR &= ~PWR_CR_PDDS; // explicit clear PDDS, just to be safe
   SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
   __WFI();
 }