diff --git a/tests/mpu_stack_guard/Makefile b/tests/mpu_stack_guard/Makefile
index 7349a165d3fb77e4ec69d1919f9caf49edb46fdd..bfd3d977dbf942a43042057d706e1a4fc102b605 100644
--- a/tests/mpu_stack_guard/Makefile
+++ b/tests/mpu_stack_guard/Makefile
@@ -1,4 +1,5 @@
 APPLICATION = mpu_stack_guard
+BOARD ?= samr21-xpro
 include ../Makefile.tests_common
 
 BOARD_WHITELIST += arduino-due      # cortex-m3