Index: usr.sbin/jail/tests/Makefile
===================================================================
--- usr.sbin/jail/tests/Makefile
+++ usr.sbin/jail/tests/Makefile
@@ -5,5 +5,7 @@
 ATF_TESTS_SH+=  jail_basic_test
 
 ${PACKAGE}FILES+=	commands.jail.conf
+# The different test cases create jails with the same name.
+TEST_METADATA+= is_exclusive="true"
 
 .include <bsd.test.mk>