diff --git a/tests/unittests/Makefile b/tests/unittests/Makefile
index 0d5d411d3ddb39ba9bd32addcb23516c6caa2c9e..dcb5b1dbcfa60482ab3d550b26b54afc8d47f134 100644
--- a/tests/unittests/Makefile
+++ b/tests/unittests/Makefile
@@ -1,3 +1,4 @@
+DEVELHELP ?= 0
 include ../Makefile.tests_common
 
 BOARD_INSUFFICIENT_MEMORY := airfy-beacon \