diff --git a/tests/sys/fido2_ctap/main.c b/tests/sys/fido2_ctap/main.c
index 31ffbc44ef..bda766ca1e 100644
--- a/tests/sys/fido2_ctap/main.c
+++ b/tests/sys/fido2_ctap/main.c
@@ -20,7 +20,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#define ENABLE_DEBUG    (0)
+#define ENABLE_DEBUG 0
 #include "debug.h"
 
 #include "xtimer.h"
diff --git a/tests/sys/senml_phydat/main.c b/tests/sys/senml_phydat/main.c
index 60de8e0ba2..ef2217a852 100644
--- a/tests/sys/senml_phydat/main.c
+++ b/tests/sys/senml_phydat/main.c
@@ -26,7 +26,7 @@
 #include "flash_utils.h"
 #include "senml/phydat.h"
 
-#define ENABLE_DEBUG (0)
+#define ENABLE_DEBUG 0
 #include "debug.h"
 
 #ifndef PRIi64