diff --git a/tests/Makefile.am b/tests/Makefile.am
index 6da595c..f92830e 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -1,4 +1,6 @@
 
+SUBDIRS = . unused
+
 noinst_SCRIPTS = \
 	filter_addresses \
 	filter_discards \