diff --git a/test/asf/test_quic.py b/test/asf/test_quic.py
index e453bd5..c4fa691 100644
--- a/test/asf/test_quic.py
+++ b/test/asf/test_quic.py
@@ -117,6 +117,18 @@
         self.logger.debug(self.vapi.cli("show ip fib"))
 
     def tearDown(self):
+        self.vapi.app_namespace_add_del_v4(
+            is_add=0,
+            namespace_id=self.server_appns,
+            secret=self.server_appns_secret,
+            sw_if_index=self.loop0.sw_if_index,
+        )
+        self.vapi.app_namespace_add_del_v4(
+            is_add=0,
+            namespace_id=self.client_appns,
+            secret=self.client_appns_secret,
+            sw_if_index=self.loop1.sw_if_index,
+        )
         # Delete inter-table routes
         self.ip_t01.remove_vpp_config()
         self.ip_t10.remove_vpp_config()
diff --git a/test/asf/test_session.py b/test/asf/test_session.py
index 741773d..184ec4f 100644
--- a/test/asf/test_session.py
+++ b/test/asf/test_session.py
@@ -60,6 +60,14 @@
             i.set_table_ip4(0)
             i.admin_down()
 
+        # Unconfigure namespaces - remove our locks to the vrf tables
+        self.vapi.app_namespace_add_del_v4(
+            is_add=0, namespace_id="0", sw_if_index=self.loop0.sw_if_index
+        )
+        self.vapi.app_namespace_add_del_v4(
+            is_add=0, namespace_id="1", sw_if_index=self.loop1.sw_if_index
+        )
+
         super(TestSession, self).tearDown()
         self.vapi.session_enable_disable(is_enable=1)
 
diff --git a/test/asf/test_tcp.py b/test/asf/test_tcp.py
index 3edcd71..23772d3 100644
--- a/test/asf/test_tcp.py
+++ b/test/asf/test_tcp.py
@@ -48,6 +48,12 @@
         )
 
     def tearDown(self):
+        self.vapi.app_namespace_add_del_v4(
+            is_add=0, namespace_id="0", sw_if_index=self.loop0.sw_if_index
+        )
+        self.vapi.app_namespace_add_del_v4(
+            is_add=0, namespace_id="1", sw_if_index=self.loop1.sw_if_index
+        )
         for i in self.lo_interfaces:
             i.unconfig_ip4()
             i.set_table_ip4(0)
diff --git a/test/asf/test_tls.py b/test/asf/test_tls.py
index d2d1d9a..2ce8714 100644
--- a/test/asf/test_tls.py
+++ b/test/asf/test_tls.py
@@ -91,6 +91,12 @@
         )
 
     def tearDown(self):
+        self.vapi.app_namespace_add_del_v4(
+            is_add=0, namespace_id="0", sw_if_index=self.loop0.sw_if_index
+        )
+        self.vapi.app_namespace_add_del_v4(
+            is_add=0, namespace_id="1", sw_if_index=self.loop1.sw_if_index
+        )
         for i in self.lo_interfaces:
             i.unconfig_ip4()
             i.set_table_ip4(0)
diff --git a/test/asf/test_vcl.py b/test/asf/test_vcl.py
index a0141be..a186c6f 100644
--- a/test/asf/test_vcl.py
+++ b/test/asf/test_vcl.py
@@ -189,6 +189,12 @@
         self.logger.debug(self.vapi.cli("show ip fib"))
 
     def thru_host_stack_tear_down(self):
+        self.vapi.app_namespace_add_del_v4(
+            is_add=0, namespace_id="1", secret=1234, sw_if_index=self.loop0.sw_if_index
+        )
+        self.vapi.app_namespace_add_del_v4(
+            is_add=0, namespace_id="2", secret=5678, sw_if_index=self.loop1.sw_if_index
+        )
         for i in self.lo_interfaces:
             i.unconfig_ip4()
             i.set_table_ip4(0)
@@ -240,6 +246,12 @@
         self.logger.debug(self.vapi.cli("show ip6 fib"))
 
     def thru_host_stack_ipv6_tear_down(self):
+        self.vapi.app_namespace_add_del_v4(
+            is_add=0, namespace_id="1", secret=1234, sw_if_index=self.loop0.sw_if_index
+        )
+        self.vapi.app_namespace_add_del_v4(
+            is_add=0, namespace_id="2", secret=5678, sw_if_index=self.loop1.sw_if_index
+        )
         for i in self.lo_interfaces:
             i.unconfig_ip6()
             i.set_table_ip6(0)
@@ -994,6 +1006,34 @@
             iperf3, self.server_iperf3_args, iperf3, self.client_iperf3_args
         )
 
+
+class LDPThruHostStackIperfMss(VCLTestCase):
+    """LDP Thru Host Stack Iperf with MSS"""
+
+    @classmethod
+    def setUpClass(cls):
+        super(LDPThruHostStackIperfMss, cls).setUpClass()
+
+    @classmethod
+    def tearDownClass(cls):
+        super(LDPThruHostStackIperfMss, cls).tearDownClass()
+
+    def setUp(self):
+        super(LDPThruHostStackIperfMss, self).setUp()
+
+        self.thru_host_stack_setup()
+        self.client_iperf3_timeout = 20
+        self.client_iperf3_args = ["-4", "-t 2", "-c", self.loop0.local_ip4]
+        self.server_iperf3_args = ["-4", "-s"]
+
+    def tearDown(self):
+        self.thru_host_stack_tear_down()
+        super(LDPThruHostStackIperfMss, self).tearDown()
+
+    def show_commands_at_teardown(self):
+        self.logger.debug(self.vapi.cli("show session verbose 2"))
+        self.logger.debug(self.vapi.cli("show app mq"))
+
     @unittest.skipUnless(_have_iperf3, "'%s' not found, Skipping.")
     def test_ldp_thru_host_stack_iperf3_mss(self):
         """run LDP thru host stack iperf3 test with mss option"""
diff --git a/test/test_udp.py b/test/test_udp.py
index edcd293..2c0710b 100644
--- a/test/test_udp.py
+++ b/test/test_udp.py
@@ -725,6 +725,14 @@
             i.unconfig_ip4()
             i.set_table_ip4(0)
             i.admin_down()
+        # Unconfigure namespaces - remove our locks to the vrf tables
+        self.vapi.app_namespace_add_del_v4(
+            is_add=0, namespace_id="0", sw_if_index=self.loop0.sw_if_index
+        )
+        self.vapi.app_namespace_add_del_v4(
+            is_add=0, namespace_id="1", sw_if_index=self.loop1.sw_if_index
+        )
+
         self.vapi.session_enable_disable(is_enable=0)
         super(TestUDP, self).tearDown()