diff --git a/tempest/api_schema/compute/aggregates.py b/tempest/api_schema/compute/aggregates.py
index a70b356..a3ab3c8 100644
--- a/tempest/api_schema/compute/aggregates.py
+++ b/tempest/api_schema/compute/aggregates.py
@@ -12,9 +12,11 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+import copy
+
 aggregate = {
     'type': 'object',
-    'properties:': {
+    'properties': {
         'availability_zone': {'type': ['string', 'null']},
         'created_at': {'type': 'string'},
         'deleted': {'type': 'boolean'},
@@ -56,3 +58,9 @@
 }
 
 aggregate_set_metadata = get_aggregate
+# The 'updated_at' attribute of 'update_aggregate' can't be null.
+update_aggregate = copy.deepcopy(get_aggregate)
+update_aggregate['response_body']['properties']['aggregate']['properties'][
+    'updated_at'] = {
+        'type': 'string'
+    }
diff --git a/tempest/services/compute/json/aggregates_client.py b/tempest/services/compute/json/aggregates_client.py
index fe67102..54d1252 100644
--- a/tempest/services/compute/json/aggregates_client.py
+++ b/tempest/services/compute/json/aggregates_client.py
@@ -61,6 +61,7 @@
         resp, body = self.put('os-aggregates/%s' % str(aggregate_id), put_body)
 
         body = json.loads(body)
+        self.validate_response(schema.update_aggregate, resp, body)
         return resp, body['aggregate']
 
     def delete_aggregate(self, aggregate_id):
diff --git a/tempest/services/compute/v3/json/aggregates_client.py b/tempest/services/compute/v3/json/aggregates_client.py
index 8d7440e..0fc6af9 100644
--- a/tempest/services/compute/v3/json/aggregates_client.py
+++ b/tempest/services/compute/v3/json/aggregates_client.py
@@ -61,6 +61,7 @@
         resp, body = self.put('os-aggregates/%s' % str(aggregate_id), put_body)
 
         body = json.loads(body)
+        self.validate_response(schema.update_aggregate, resp, body)
         return resp, body['aggregate']
 
     def delete_aggregate(self, aggregate_id):