diff --git a/tests/cpu/mpu_noexec_ram/Makefile b/tests/cpu/mpu_noexec_ram/Makefile
index 502daac2a397..c5fd74248c53 100644
--- a/tests/cpu/mpu_noexec_ram/Makefile
+++ b/tests/cpu/mpu_noexec_ram/Makefile
@@ -4,4 +4,7 @@ include ../Makefile.cpu_common
 
 USEMODULE += mpu_noexec_ram
 
+# boards using highlevel_stdio will crash without printing
+FEATURES_BLACKLIST += highlevel_stdio
+
 include $(RIOTBASE)/Makefile.include
diff --git a/tests/cpu/mpu_stack_guard/Makefile b/tests/cpu/mpu_stack_guard/Makefile
index beb656e1bb6a..9a94033b0884 100644
--- a/tests/cpu/mpu_stack_guard/Makefile
+++ b/tests/cpu/mpu_stack_guard/Makefile
@@ -4,6 +4,9 @@ include ../Makefile.cpu_common
 
 USEMODULE += mpu_stack_guard
 
+# boards using highlevel_stdio will crash without printing
+FEATURES_BLACKLIST += highlevel_stdio
+
 include $(RIOTBASE)/Makefile.include
 
 ifeq (llvm,$(TOOLCHAIN))