diff --git a/tempest/lib/services/placement/resource_providers_client.py b/tempest/lib/services/placement/resource_providers_client.py
index fcd220f..e6fbcb2 100644
--- a/tempest/lib/services/placement/resource_providers_client.py
+++ b/tempest/lib/services/placement/resource_providers_client.py
@@ -81,3 +81,29 @@
         self.expected_success(200, resp.status)
         body = json.loads(body)
         return rest_client.ResponseBody(resp, body)
+
+    def update_resource_providers_inventories(self, rp_uuid, **kwargs):
+        """Update resource providers inventories.
+
+        For full list of available parameters, please refer to the official
+        API reference:
+        https://docs.openstack.org/api-ref/placement/#update-resource-provider-inventories
+        """
+        url = '/resource_providers/{}/inventories'.format(rp_uuid)
+        data = json.dumps(kwargs)
+        resp, body = self.put(url, data)
+        self.expected_success(200, resp.status)
+        body = json.loads(body)
+        return rest_client.ResponseBody(resp, body)
+
+    def delete_resource_providers_inventories(self, rp_uuid):
+        """Delete resource providers inventories.
+
+        For full list of available parameters, please refer to the official
+        API reference:
+        https://docs.openstack.org/api-ref/placement/#delete-resource-provider-inventories
+        """
+        url = '/resource_providers/{}/inventories'.format(rp_uuid)
+        resp, body = self.delete(url)
+        self.expected_success(204, resp.status)
+        return rest_client.ResponseBody(resp, body)
diff --git a/tempest/tests/lib/services/placement/test_resource_providers_client.py b/tempest/tests/lib/services/placement/test_resource_providers_client.py
index 11aeaf2..485f584 100644
--- a/tempest/tests/lib/services/placement/test_resource_providers_client.py
+++ b/tempest/tests/lib/services/placement/test_resource_providers_client.py
@@ -48,6 +48,43 @@
     FAKE_RESOURCE_PROVIDER_AGGREGATES = {
         'aggregates': [FAKE_AGGREGATE_UUID]
     }
+    FAKE_RESOURCE_UPDATE_INVENTORIES_RESPONSE = {
+        "inventories": {
+            "MEMORY_MB": {
+                "allocation_ratio": 2.0,
+                "max_unit": 16,
+                "min_unit": 1,
+                "reserved": 0,
+                "step_size": 4,
+                "total": 128
+            },
+            "VCPU": {
+                "allocation_ratio": 10.0,
+                "max_unit": 2147483647,
+                "min_unit": 1,
+                "reserved": 2,
+                "step_size": 1,
+                "total": 64
+            }
+        },
+        "resource_provider_generation": 2
+    }
+    FAKE_RESOURCE_UPDATE_INVENTORIES_REQUEST = {
+        "inventories": {
+            "MEMORY_MB": {
+                "allocation_ratio": 2.0,
+                "max_unit": 16,
+                "step_size": 4,
+                "total": 128
+            },
+            "VCPU": {
+                "allocation_ratio": 10.0,
+                "reserved": 2,
+                "total": 64
+            }
+        },
+        "resource_provider_generation": 1
+    }
 
     def setUp(self):
         super(TestResourceProvidersClient, self).setUp()
@@ -102,6 +139,32 @@
     def test_list_resource_provider_inventories_with_bytes_body(self):
         self._test_list_resource_provider_inventories(bytes_body=True)
 
+    def _test_update_resource_providers_inventories(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.update_resource_providers_inventories,
+            'tempest.lib.common.rest_client.RestClient.put',
+            self.FAKE_RESOURCE_UPDATE_INVENTORIES_RESPONSE,
+            to_utf=bytes_body,
+            status=200,
+            rp_uuid=self.FAKE_RESOURCE_PROVIDER_UUID,
+            **self.FAKE_RESOURCE_UPDATE_INVENTORIES_REQUEST
+        )
+
+    def test_update_resource_providers_inventories_with_str_body(self):
+        self._test_update_resource_providers_inventories()
+
+    def test_update_resource_providers_inventories_with_bytes_body(self):
+        self._test_update_resource_providers_inventories(bytes_body=True)
+
+    def test_delete_resource_providers_inventories(self):
+        self.check_service_client_function(
+            self.client.delete_resource_providers_inventories,
+            'tempest.lib.common.rest_client.RestClient.delete',
+            {},
+            status=204,
+            rp_uuid=self.FAKE_RESOURCE_PROVIDER_UUID,
+        )
+
     def _test_list_resource_provider_aggregates(self, bytes_body=False):
         self.check_service_client_function(
             self.client.list_resource_provider_aggregates,