diff --git a/.zuul.yaml b/.zuul.yaml
index 5e3f33a..37fad60 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -720,6 +720,7 @@
             voting: false
             irrelevant-files: *tempest-irrelevant-files
         - neutron-tempest-dvr:
+            voting: false
             irrelevant-files: *tempest-irrelevant-files
         - interop-tempest-consistency:
             irrelevant-files: *tempest-irrelevant-files
diff --git a/releasenotes/notes/add-show-default-volume-types-api-to-v3-types-client-44b2676f217d78dc.yaml b/releasenotes/notes/add-show-default-volume-types-api-to-v3-types-client-44b2676f217d78dc.yaml
new file mode 100644
index 0000000..2cd5af6
--- /dev/null
+++ b/releasenotes/notes/add-show-default-volume-types-api-to-v3-types-client-44b2676f217d78dc.yaml
@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    Add show type API to v3 types_client library.
+
+    * default_volume_type
diff --git a/tempest/lib/api_schema/response/volume/groups.py b/tempest/lib/api_schema/response/volume/groups.py
index cb31269..f6e4bc2 100644
--- a/tempest/lib/api_schema/response/volume/groups.py
+++ b/tempest/lib/api_schema/response/volume/groups.py
@@ -64,7 +64,10 @@
                         'type': 'array',
                         'items': {'type': 'string', 'format': 'uuid'}
                     },
-                    'replication_status': {'type': 'string'}
+                    # TODO(zhufl): replication_status is added in 3.38, we
+                    # should move it to the 3.38 schema file when microversion
+                    # is supported in volume interfaces
+                    'replication_status': {'type': ['string', 'null']}
                 },
                 'additionalProperties': False,
                 'required': ['status', 'description', 'created_at',
@@ -129,6 +132,10 @@
                             'type': 'array',
                             'items': {'type': 'string', 'format': 'uuid'}
                         },
+                        # TODO(zhufl): replication_status is added in 3.38, we
+                        # should move it to the 3.38 schema file when
+                        # microversion is supported in volume interfaces
+                        'replication_status': {'type': ['string', 'null']}
                     },
                     'additionalProperties': False,
                     'required': ['status', 'description', 'created_at',
diff --git a/tempest/lib/common/utils/test_utils.py b/tempest/lib/common/utils/test_utils.py
index 2a9f3a9..4cf8351 100644
--- a/tempest/lib/common/utils/test_utils.py
+++ b/tempest/lib/common/utils/test_utils.py
@@ -80,10 +80,19 @@
 
 def call_and_ignore_notfound_exc(func, *args, **kwargs):
     """Call the given function and pass if a `NotFound` exception is raised."""
-    try:
-        return func(*args, **kwargs)
-    except exceptions.NotFound:
-        pass
+    attempt = 0
+    while True:
+        attempt += 1
+        try:
+            return func(*args, **kwargs)
+        except exceptions.NotFound:
+            return
+        except exceptions.ServerFault:
+            # NOTE(danms): Tolerate three ServerFault exceptions while trying
+            # to do this thing, and after that, assume it's legit.
+            if attempt >= 3:
+                raise
+            LOG.warning('Got ServerFault while running %s, retrying...', func)
 
 
 def call_until_true(func, duration, sleep_for, *args, **kwargs):
diff --git a/tempest/lib/services/volume/v3/types_client.py b/tempest/lib/services/volume/v3/types_client.py
index 7fa24a4..1ebd447 100644
--- a/tempest/lib/services/volume/v3/types_client.py
+++ b/tempest/lib/services/volume/v3/types_client.py
@@ -65,6 +65,19 @@
         self.validate_response(schema.show_volume_type, resp, body)
         return rest_client.ResponseBody(resp, body)
 
+    def show_default_volume_type(self):
+        """Returns the details of a single volume type.
+
+        For a full list of available parameters, please refer to the official
+        API reference:
+        https://docs.openstack.org/api-ref/block-storage/v3/index.html#show-default-volume-type
+        """
+        url = "types/default"
+        resp, body = self.get(url)
+        body = json.loads(body)
+        self.validate_response(schema.show_volume_type, resp, body)
+        return rest_client.ResponseBody(resp, body)
+
     def create_volume_type(self, **kwargs):
         """Create volume type.
 
diff --git a/tempest/scenario/test_minbw_allocation_placement.py b/tempest/scenario/test_minbw_allocation_placement.py
index 5eab1da..74d4ed9 100644
--- a/tempest/scenario/test_minbw_allocation_placement.py
+++ b/tempest/scenario/test_minbw_allocation_placement.py
@@ -178,7 +178,13 @@
         for rp, resources in allocations['allocations'].items():
             if self.INGRESS_RESOURCE_CLASS in resources['resources']:
                 bw_resource_in_alloc = True
+                allocation_rp = rp
         self.assertTrue(bw_resource_in_alloc)
+        # Check that binding_profile of the port is not empty and equals with
+        # the rp uuid
+        port = self.os_admin.ports_client.show_port(valid_port['id'])
+        self.assertEqual(allocation_rp,
+                         port['port']['binding:profile']['allocation'])
 
         # boot another vm with max int bandwidth
         not_valid_port = self.create_port(
@@ -196,3 +202,6 @@
         server2 = self.servers_client.show_server(server2['id'])
         self.assertIn('fault', server2['server'])
         self.assertIn('No valid host', server2['server']['fault']['message'])
+        # Check that binding_profile of the port is empty
+        port = self.os_admin.ports_client.show_port(not_valid_port['id'])
+        self.assertEqual(0, len(port['port']['binding:profile']))
diff --git a/tempest/tests/lib/common/utils/test_test_utils.py b/tempest/tests/lib/common/utils/test_test_utils.py
index bdc0ea4..d8e3745 100644
--- a/tempest/tests/lib/common/utils/test_test_utils.py
+++ b/tempest/tests/lib/common/utils/test_test_utils.py
@@ -74,6 +74,17 @@
         self.assertRaises(ValueError, test_utils.call_and_ignore_notfound_exc,
                           raise_value_error)
 
+    def test_call_and_ignore_notfound_exc_when_serverfault_raised(self):
+        calls = []
+
+        def raise_serverfault():
+            calls.append('call')
+            raise exceptions.ServerFault()
+        self.assertRaises(exceptions.ServerFault,
+                          test_utils.call_and_ignore_notfound_exc,
+                          raise_serverfault)
+        self.assertEqual(3, len(calls))
+
     def test_call_and_ignore_notfound_exc(self):
         m = mock.Mock(return_value=42)
         args, kwargs = (1,), {'1': None}
diff --git a/tempest/tests/lib/services/volume/v3/test_types_client.py b/tempest/tests/lib/services/volume/v3/test_types_client.py
index 336aa32..19d6591 100644
--- a/tempest/tests/lib/services/volume/v3/test_types_client.py
+++ b/tempest/tests/lib/services/volume/v3/test_types_client.py
@@ -121,6 +121,13 @@
             to_utf=bytes_body,
             volume_type_id="6685584b-1eac-4da6-b5c3-555430cf68ff")
 
+    def _test_show_default_volume_type(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.show_default_volume_type,
+            'tempest.lib.common.rest_client.RestClient.get',
+            self.FAKE_DEFAULT_VOLUME_TYPE_INFO,
+            to_utf=bytes_body)
+
     def _test_create_volume_type(self, bytes_body=False):
         self.check_service_client_function(
             self.client.create_volume_type,
@@ -224,6 +231,12 @@
     def test_show_volume_type_with_bytes_body(self):
         self._test_show_volume_type(bytes_body=True)
 
+    def test_show_default_volume_type_with_str_body(self):
+        self._test_show_default_volume_type()
+
+    def test_show_default_volume_type_with_bytes_body(self):
+        self._test_show_default_volume_type(bytes_body=True)
+
     def test_create_volume_type_str_body(self):
         self._test_create_volume_type()
 
diff --git a/tox.ini b/tox.ini
index 031a400..2ea8129 100644
--- a/tox.ini
+++ b/tox.ini
@@ -279,7 +279,6 @@
 [testenv:docs]
 deps =
   -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
-  -r{toxinidir}/requirements.txt
   -r{toxinidir}/doc/requirements.txt
 commands =
   sphinx-apidoc -f -o doc/source/tests/compute tempest/api/compute
@@ -365,7 +364,6 @@
 [testenv:releasenotes]
 deps =
   -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
-  -r{toxinidir}/requirements.txt
   -r{toxinidir}/doc/requirements.txt
 commands =
   rm -rf releasenotes/build