diff --git a/neutron_tempest_plugin/scenario/base.py b/neutron_tempest_plugin/scenario/base.py
index 127701c..6910c11 100644
--- a/neutron_tempest_plugin/scenario/base.py
+++ b/neutron_tempest_plugin/scenario/base.py
@@ -207,6 +207,21 @@
         LOG.debug("Created router %s", router['name'])
         return router
 
+    @classmethod
+    def skip_if_no_extension_enabled_in_l3_agents(cls, extension):
+        l3_agents = cls.os_admin.network_client.list_agents(
+                binary='neutron-l3-agent')['agents']
+        if not l3_agents:
+            # the tests should not be skipped when neutron-l3-agent does not
+            # exist (this validation doesn't apply to the setups like
+            # e.g. ML2/OVN)
+            return
+        for agent in l3_agents:
+            if extension in agent['configurations'].get('extensions', []):
+                return
+        raise cls.skipTest("No L3 agent with '%s' extension enabled found." %
+                           extension)
+
     @removals.remove(version='Stein',
                      message="Please use create_floatingip method instead of "
                              "create_and_associate_floatingip.")
diff --git a/neutron_tempest_plugin/scenario/test_floatingip.py b/neutron_tempest_plugin/scenario/test_floatingip.py
index 262f429..bf890ad 100644
--- a/neutron_tempest_plugin/scenario/test_floatingip.py
+++ b/neutron_tempest_plugin/scenario/test_floatingip.py
@@ -341,15 +341,6 @@
     def resource_setup(cls):
         super(FloatingIPQosTest, cls).resource_setup()
 
-    def skip_if_no_extension_enabled_in_l3_agents(self, extension):
-        l3_agents = self.os_admin.network_client.list_agents(
-                binary='neutron-l3-agent')['agents']
-        for agent in l3_agents:
-            if extension in agent['configurations'].get('extensions', []):
-                return
-        raise self.skipTest("No L3 agent with '%s' extension enabled found." %
-                            extension)
-
     @decorators.idempotent_id('5eb48aea-eaba-4c20-8a6f-7740070a0aa3')
     def test_qos(self):
         """Test floating IP is binding to a QoS policy with
diff --git a/neutron_tempest_plugin/scenario/test_port_forwardings.py b/neutron_tempest_plugin/scenario/test_port_forwardings.py
index 6a5d3c9..a3adc03 100644
--- a/neutron_tempest_plugin/scenario/test_port_forwardings.py
+++ b/neutron_tempest_plugin/scenario/test_port_forwardings.py
@@ -31,11 +31,13 @@
 
 class PortForwardingTestJSON(base.BaseTempestTestCase):
 
+    credentials = ['primary', 'admin']
     required_extensions = ['router', 'floating-ip-port-forwarding']
 
     @classmethod
     def resource_setup(cls):
         super(PortForwardingTestJSON, cls).resource_setup()
+        cls.skip_if_no_extension_enabled_in_l3_agents("port_forwarding")
         cls.network = cls.create_network()
         cls.subnet = cls.create_subnet(cls.network)
         cls.router = cls.create_router_by_client()