diff --git a/patrole_tempest_plugin/tests/api/compute/test_server_actions_rbac.py b/patrole_tempest_plugin/tests/api/compute/test_server_actions_rbac.py
index 1a6869e..1fe52e9 100644
--- a/patrole_tempest_plugin/tests/api/compute/test_server_actions_rbac.py
+++ b/patrole_tempest_plugin/tests/api/compute/test_server_actions_rbac.py
@@ -293,6 +293,7 @@
             self.compute_images_client.delete_image, image['id'])
 
     @decorators.idempotent_id('9fdd4630-731c-4f7c-bce5-69fa3792c52a')
+    @decorators.attr(type='slow')
     @testtools.skipUnless(CONF.compute_feature_enabled.snapshot,
                           'Snapshotting not available, backup not possible.')
     @utils.services('image')
diff --git a/patrole_tempest_plugin/tests/api/compute/test_server_misc_policy_actions_rbac.py b/patrole_tempest_plugin/tests/api/compute/test_server_misc_policy_actions_rbac.py
index f6dfcca..13faca1 100644
--- a/patrole_tempest_plugin/tests/api/compute/test_server_misc_policy_actions_rbac.py
+++ b/patrole_tempest_plugin/tests/api/compute/test_server_misc_policy_actions_rbac.py
@@ -570,8 +570,7 @@
     @classmethod
     def resource_setup(cls):
         def _cleanup_ports(network_id):
-            ports = cls.ports_client.\
-                list_ports(network_id=network_id)['ports']
+            ports = cls.ports_client.list_ports(network_id=network_id)['ports']
             for port in ports:
                 test_utils.call_and_ignore_notfound_exc(
                     cls.ports_client.delete_port,
@@ -666,6 +665,9 @@
             self.interfaces_client, self.server['id'],
             interface['port_id'], 'ACTIVE')
         self.addCleanup(
+            waiters.wait_for_interface_detach, self.interfaces_client,
+            self.server['id'], interface['port_id'])
+        self.addCleanup(
             test_utils.call_and_ignore_notfound_exc,
             self.interfaces_client.delete_interface,
             self.server['id'], interface['port_id'])
@@ -684,6 +686,8 @@
         with self.rbac_utils.override_role(self):
             self.interfaces_client.delete_interface(self.server['id'],
                                                     interface['port_id'])
+        waiters.wait_for_interface_detach(
+            self.interfaces_client, self.server['id'], interface['port_id'])
 
     @decorators.idempotent_id('6886d360-0d86-4760-b1a3-882d81fbebcc')
     @utils.requires_ext(extension='os-ips', service='compute')
@@ -723,8 +727,15 @@
         if interfaces:
             network_id = interfaces[0]['net_id']
         else:
-            network_id = self.interfaces_client.create_interface(
-                self.server['id'])['interfaceAttachment']['net_id']
+            interface = self.interfaces_client.create_interface(
+                self.server['id'])['interfaceAttachment']
+            network_id = interface['net_id']
+            self.addCleanup(
+                waiters.wait_for_interface_detach, self.interfaces_client,
+                self.server['id'], interface['port_id'])
+            self.addCleanup(
+                self.interfaces_client.delete_interface,
+                self.server['id'], interface['port_id'])
 
         with self.rbac_utils.override_role(self):
             self.servers_client.add_fixed_ip(self.server['id'],
diff --git a/patrole_tempest_plugin/tests/api/compute/test_server_volume_attachments_rbac.py b/patrole_tempest_plugin/tests/api/compute/test_server_volume_attachments_rbac.py
index b803fe3..a510d1e 100644
--- a/patrole_tempest_plugin/tests/api/compute/test_server_volume_attachments_rbac.py
+++ b/patrole_tempest_plugin/tests/api/compute/test_server_volume_attachments_rbac.py
@@ -25,6 +25,10 @@
 CONF = config.CONF
 
 
+# FIXME(felipemonteiro): `@decorators.attr(type='slow')` are added to tests
+# below to in effect cause the tests to be non-voting in Zuul due to a high
+# rate of spurious failures related to volume attachments. This will be
+# revisited at a later date.
 class ServerVolumeAttachmentRbacTest(rbac_base.BaseV2ComputeRbacTest):
 
     @classmethod
@@ -53,6 +57,7 @@
         with self.rbac_utils.override_role(self):
             self.servers_client.list_volume_attachments(self.server['id'])
 
+    @decorators.attr(type='slow')
     @rbac_rule_validation.action(
         service="nova",
         rule="os_compute_api:os-volumes-attachments:create")
@@ -61,6 +66,7 @@
         with self.rbac_utils.override_role(self):
             self.attach_volume(self.server, self.volume)
 
+    @decorators.attr(type='slow')
     @rbac_rule_validation.action(
         service="nova",
         rule="os_compute_api:os-volumes-attachments:show")
diff --git a/patrole_tempest_plugin/tests/api/compute/test_virtual_interfaces_rbac.py b/patrole_tempest_plugin/tests/api/compute/test_virtual_interfaces_rbac.py
index 6edb8d9..ae77a34 100644
--- a/patrole_tempest_plugin/tests/api/compute/test_virtual_interfaces_rbac.py
+++ b/patrole_tempest_plugin/tests/api/compute/test_virtual_interfaces_rbac.py
@@ -23,10 +23,13 @@
 CONF = config.CONF
 
 
+# TODO(rb560u): Remove this test class once the nova queens branch goes into
+# extended maintenance mode.
 class VirtualInterfacesRbacTest(rbac_base.BaseV2ComputeRbacTest):
     # The compute os-virtual-interfaces API is deprecated from the Microversion
     # 2.44 onward. For more information, see:
     # https://developer.openstack.org/api-ref/compute/#servers-virtual-interfaces-servers-os-virtual-interfaces-deprecated
+    depends_on_nova_network = True
     max_microversion = '2.43'
 
     @classmethod
diff --git a/patrole_tempest_plugin/tests/api/volume/test_volume_actions_rbac.py b/patrole_tempest_plugin/tests/api/volume/test_volume_actions_rbac.py
index 46f7a3e..dcc2bd5 100644
--- a/patrole_tempest_plugin/tests/api/volume/test_volume_actions_rbac.py
+++ b/patrole_tempest_plugin/tests/api/volume/test_volume_actions_rbac.py
@@ -73,6 +73,7 @@
         '"volume_extension:volume_actions:attach" must be available in the '
         'cloud.')
     @utils.services('compute')
+    @decorators.attr(type='slow')
     @rbac_rule_validation.action(
         service="cinder",
         rule="volume_extension:volume_actions:attach")