diff --git a/tests/sys/netpfil/pf/Makefile b/tests/sys/netpfil/pf/Makefile
--- a/tests/sys/netpfil/pf/Makefile
+++ b/tests/sys/netpfil/pf/Makefile
@@ -53,6 +53,8 @@
 # Tests reuse jail names and so cannot run in parallel.
 TEST_METADATA+=	is_exclusive=true
 
+TEST_METADATA.pass_block+=	is_exclusive=false
+
 PROGS=	divapp
 
 ${PACKAGE}FILES+=	CVE-2019-5597.py \
diff --git a/tests/sys/netpfil/pf/pass_block.sh b/tests/sys/netpfil/pf/pass_block.sh
--- a/tests/sys/netpfil/pf/pass_block.sh
+++ b/tests/sys/netpfil/pf/pass_block.sh
@@ -28,11 +28,18 @@
 
 common_dir=$(atf_get_srcdir)/../common
 
+execenv_jail()
+{
+	atf_set execenv jail
+	atf_set execenv.jail vnet
+}
+
 atf_test_case "enable_disable" "cleanup"
 enable_disable_head()
 {
 	atf_set descr 'Test enable/disable'
 	atf_set require.user root
+	execenv_jail
 }
 
 enable_disable_body()
@@ -70,6 +77,7 @@
 {
 	atf_set descr 'Basic pass/block test for IPv4'
 	atf_set require.user root
+	execenv_jail
 }
 
 v4_body()
@@ -109,6 +117,7 @@
 {
 	atf_set descr 'Basic pass/block test for IPv6'
 	atf_set require.user root
+	execenv_jail
 }
 
 v6_body()
@@ -152,6 +161,7 @@
 {
 	atf_set descr 'Test the :0 noalias option'
 	atf_set require.user root
+	execenv_jail
 }
 
 noalias_body()
@@ -197,6 +207,7 @@
 {
 	atf_set descr "Test nested inline anchors, PR196314"
 	atf_set require.user root
+	execenv_jail
 }
 
 nested_inline_body()
@@ -233,6 +244,7 @@
 	atf_set descr "Test unicast reverse path forwarding check"
 	atf_set require.user root
 	atf_set require.progs scapy
+	execenv_jail
 }
 
 urpf_body()