diff --git a/sys/kern/sysctl_security_jail_children.sh b/sys/kern/sysctl_security_jail_children.sh
--- a/sys/kern/sysctl_security_jail_children.sh
+++ b/sys/kern/sysctl_security_jail_children.sh
@@ -33,6 +33,9 @@
 {
 	atf_set descr 'Test maximum and current number of child jails'
 	atf_set require.user root
+	if ! which -s jail; then
+		atf_skip "This test requires jail"
+	fi
 }
 max_cur_body()
 {