diff --git a/tests/sys/mac/portacl/Makefile b/tests/sys/mac/portacl/Makefile
index c9fb6bbaae3e..856a85d331d5 100644
--- a/tests/sys/mac/portacl/Makefile
+++ b/tests/sys/mac/portacl/Makefile
@@ -1,15 +1,16 @@
 PACKAGE=	tests
 
 TESTSDIR=	${TESTSBASE}/sys/mac/portacl
 
 ${PACKAGE}FILES+=	misc.sh
 
 TAP_TESTS_SH+=	nobody_test
 TAP_TESTS_SH+=	root_test
 
 .for t in ${TAP_TESTS_SH}
 TEST_METADATA.$t+=	required_user="root"
 TEST_METADATA.$t+=	timeout="450"
+TEST_METADATA.$t+=	is_exclusive="true"
 .endfor
 
 .include <bsd.test.mk>