diff --git a/pkg/tweetnacl/Makefile.dep b/pkg/tweetnacl/Makefile.dep
index 8030144a9a..a1f27a24c4 100644
--- a/pkg/tweetnacl/Makefile.dep
+++ b/pkg/tweetnacl/Makefile.dep
@@ -1 +1,4 @@
 USEMODULE+=random
+
+# the test takes ages and then reboots on msp430.
+FEATURES_BLACKLIST += arch_msp430