diff --git a/ports/avr/tests-main.c b/ports/avr/tests-main.c
index 9cb5596..a634167 100644
--- a/ports/avr/tests-main.c
+++ b/ports/avr/tests-main.c
@@ -245,7 +245,7 @@ static void main_thread_func (uint32_t data)
     stdout = &uart_stdout;
 
     /* Put a message out on the UART */
-    printf_P(PSTR("Go\n"));
+    printf_P (PSTR("Go\n"));
 
     /* Start test. All tests use the same start API. */
     test_status = test_start();
@@ -295,7 +295,7 @@ static void main_thread_func (uint32_t data)
         PORTB ^= (1 << 7);
 
         /* Sleep then toggle LED again */
-        atomTimerDelay(sleep_ticks);
+        atomTimerDelay (sleep_ticks);
     }
 
 }
diff --git a/ports/stm8/tests-main.c b/ports/stm8/tests-main.c
index 21b6d4d..6b24bf2 100644
--- a/ports/stm8/tests-main.c
+++ b/ports/stm8/tests-main.c
@@ -201,7 +201,7 @@ static void main_thread_func (uint32_t param)
     }
 
     /* Put a message out on the UART */
-    printf("Go\n");
+    printf ("Go\n");
 
     /* Start test. All tests use the same start API. */
     test_status = test_start();
@@ -255,7 +255,7 @@ static void main_thread_func (uint32_t param)
         GPIO_WriteReverse(GPIOD, GPIO_PIN_0);
 
         /* Sleep then toggle LED again */
-        atomTimerDelay(sleep_ticks);
+        atomTimerDelay (sleep_ticks);
     }
 }