diff --git a/atmel-samd/common-hal/nativeio/AnalogIn.c b/atmel-samd/common-hal/nativeio/AnalogIn.c
index 7e97577e4d..b07bbe12b9 100644
--- a/atmel-samd/common-hal/nativeio/AnalogIn.c
+++ b/atmel-samd/common-hal/nativeio/AnalogIn.c
@@ -46,7 +46,7 @@ void common_hal_nativeio_analogin_construct(nativeio_analogin_obj_t* self,
         const mcu_pin_obj_t *pin) {
     if (!pin->has_adc) {
         // No ADC function on that pin
-        nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "pin %q does not have ADC capabilities", pin->name));
+        nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Pin does not have ADC capabilities"));
     }
 
     self->pin = pin;
diff --git a/atmel-samd/common-hal/nativeio/PWMOut.c b/atmel-samd/common-hal/nativeio/PWMOut.c
index a122fadb5c..6baf1e9467 100644
--- a/atmel-samd/common-hal/nativeio/PWMOut.c
+++ b/atmel-samd/common-hal/nativeio/PWMOut.c
@@ -80,12 +80,12 @@ void common_hal_nativeio_pwmout_construct(nativeio_pwmout_obj_t* self,
 
     if (pin->primary_timer.tc == 0 && pin->secondary_timer.tc == 0) {
         nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError,
-            "Invalid pin."));
+            "Invalid pin"));
     }
 
     if (frequency == 0 || frequency > 6000000) {
         nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError,
-            "Invalid PWM frequency."));
+            "Invalid PWM frequency"));
     }
 
     uint16_t primary_timer_index = 0xff;
@@ -136,7 +136,7 @@ void common_hal_nativeio_pwmout_construct(nativeio_pwmout_obj_t* self,
             index = primary_timer_index;
         }
         if (t == NULL) {
-            nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "All timers in use."));
+            nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "All timers in use"));
             return;
         }
         uint8_t resolution = 0;
@@ -266,7 +266,7 @@ void common_hal_nativeio_pwmout_set_frequency(nativeio_pwmout_obj_t* self,
                                               uint32_t frequency) {
     if (frequency == 0 || frequency > 6000000) {
         nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError,
-            "Invalid PWM frequency."));
+            "Invalid PWM frequency"));
     }
     const pin_timer_t* t = self->timer;
     uint8_t resolution;
diff --git a/atmel-samd/common-hal/nativeio/SPI.c b/atmel-samd/common-hal/nativeio/SPI.c
index 705e30d8ee..0267a546b5 100644
--- a/atmel-samd/common-hal/nativeio/SPI.c
+++ b/atmel-samd/common-hal/nativeio/SPI.c
@@ -92,7 +92,7 @@ void common_hal_nativeio_spi_construct(nativeio_spi_obj_t *self,
         }
     }
     if (sercom == NULL) {
-        nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Invalid pins."));
+        nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Invalid pins"));
     }
 
     // Depends on where MOSI and CLK are.
@@ -111,7 +111,7 @@ void common_hal_nativeio_spi_construct(nativeio_spi_obj_t *self,
         }
     }
     if (dopo == 8) {
-        nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "SPI MOSI and clock pins incompatible."));
+        nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "SPI MOSI and clock pins incompatible"));
     }
 
     config_spi_master.mux_setting = (dopo << SERCOM_SPI_CTRLA_DOPO_Pos) |
diff --git a/atmel-samd/common-hal/nativeio/UART.c b/atmel-samd/common-hal/nativeio/UART.c
index 8a66173151..29afaf0d0a 100644
--- a/atmel-samd/common-hal/nativeio/UART.c
+++ b/atmel-samd/common-hal/nativeio/UART.c
@@ -162,7 +162,7 @@ void common_hal_nativeio_uart_construct(nativeio_uart_obj_t *self,
         }
     }
     if (sercom == NULL) {
-        nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Invalid pins."));
+        nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Invalid pins"));
     }
     if (tx == NULL) {
         tx_pad = 0;