diff --git a/tests/sys/vfs/Makefile b/tests/sys/vfs/Makefile
index 9e2d79ef773a..ec1e66b5042f 100644
--- a/tests/sys/vfs/Makefile
+++ b/tests/sys/vfs/Makefile
@@ -7,6 +7,6 @@ TESTSDIR=		${TESTSBASE}/sys/vfs
 ATF_TESTS_C+=	lookup_cap_dotdot
 CFLAGS.lookup_cap_dotdot.c+=	-I${SRCTOP}/tests
 
-PLAIN_TESTS_SH+=	trailing_slash
+TAP_TESTS_SH+=	trailing_slash
 
 .include <bsd.test.mk>