diff --git a/tests/Makefile b/tests/Makefile
index 88386eb37009..ba81cacc702b 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -2,7 +2,7 @@
 
 .include <bsd.own.mk>
 
-SUBDIR= # still empty
+SUBDIR= sys
 
 TESTSDIR= ${TESTSBASE}
 KYUAFILE= yes
diff --git a/tests/sys/Makefile b/tests/sys/Makefile
index cb41472998fc..85d51df08940 100644
--- a/tests/sys/Makefile
+++ b/tests/sys/Makefile
@@ -2,6 +2,7 @@
 
 .include <bsd.own.mk>
 
+SUBDIR= kern
 TESTSDIR= ${TESTSBASE}/sys
 
 KYUAFILE= yes