diff --git a/tempest_lib/api_schema/response/compute/v2_1/servers.py b/tempest_lib/api_schema/response/compute/v2_1/servers.py
index 4c63a34..7db05fb 100644
--- a/tempest_lib/api_schema/response/compute/v2_1/servers.py
+++ b/tempest_lib/api_schema/response/compute/v2_1/servers.py
@@ -547,3 +547,7 @@ server_actions_delete_password = {
 
 server_actions_confirm_resize = copy.deepcopy(
     server_actions_delete_password)
+
+update_attached_volume = {
+    'status_code': [202]
+}
diff --git a/tempest_lib/services/compute/servers_client.py b/tempest_lib/services/compute/servers_client.py
index 5bbcf24..cdb992b 100644
--- a/tempest_lib/services/compute/servers_client.py
+++ b/tempest_lib/services/compute/servers_client.py
@@ -312,6 +312,15 @@ class ServersClient(rest_client.RestClient):
         self.validate_response(schema.attach_volume, resp, body)
         return rest_client.ResponseBody(resp, body)
 
+    def update_attached_volume(self, server_id, attachment_id, **kwargs):
+        """Swaps a volume attached to an instance for another volume"""
+        post_body = json.dumps({'volumeAttachment': kwargs})
+        resp, body = self.put('servers/%s/os-volume_attachments/%s' %
+                              (server_id, attachment_id),
+                              post_body)
+        self.validate_response(schema.update_attached_volume, resp, body)
+        return rest_client.ResponseBody(resp, body)
+
     def detach_volume(self, server_id, volume_id):  # noqa
         """Detaches a volume from a server instance."""
         resp, body = self.delete('servers/%s/os-volume_attachments/%s' %
diff --git a/tempest_lib/tests/services/compute/test_servers_client.py b/tempest_lib/tests/services/compute/test_servers_client.py
index 44cd7ce..d3a4e83 100644
--- a/tempest_lib/tests/services/compute/test_servers_client.py
+++ b/tempest_lib/tests/services/compute/test_servers_client.py
@@ -564,6 +564,17 @@ class TestServersClient(base.BaseComputeServiceTest):
             server_id=self.server_id
             )
 
+    def test_update_attached_volume(self):
+        self.check_service_client_function(
+            self.client.update_attached_volume,
+            'tempest_lib.common.rest_client.RestClient.put',
+            {},
+            status=202,
+            server_id=self.server_id,
+            attachment_id='fake-attachment-id',
+            volumeId='fake-volume-id'
+            )
+
     def test_detach_volume_with_str_body(self):
         self._test_detach_volume_server()