diff --git a/gcloud/pubsub/_gax.py b/gcloud/pubsub/_gax.py
index ea2b6dcfc6c7..fb6e5d9a19d4 100644
--- a/gcloud/pubsub/_gax.py
+++ b/gcloud/pubsub/_gax.py
@@ -422,11 +422,11 @@ def _subscription_pb_to_mapping(sub_pb):
     mapping = {
         'name': sub_pb.name,
         'topic': sub_pb.topic,
-        'ack_deadline': sub_pb.ack_deadline,
+        'ackDeadlineSeconds': sub_pb.ack_deadline_seconds,
     }
     if sub_pb.push_config.push_endpoint != '':
-        mapping['push_config'] = {
-            'push_endpoint': sub_pb.push_config.push_endpoint,
+        mapping['pushConfig'] = {
+            'pushEndpoint': sub_pb.push_config.push_endpoint,
         }
     return mapping
 
diff --git a/gcloud/pubsub/test__gax.py b/gcloud/pubsub/test__gax.py
index c544a583e679..30194480ecf3 100644
--- a/gcloud/pubsub/test__gax.py
+++ b/gcloud/pubsub/test__gax.py
@@ -303,9 +303,9 @@ def test_list_subscriptions_no_paging(self):
         self.assertIsInstance(subscription, dict)
         self.assertEqual(subscription['name'], self.SUB_PATH)
         self.assertEqual(subscription['topic'], self.TOPIC_PATH)
-        self.assertEqual(subscription['push_config'],
-                         {'push_endpoint': self.PUSH_ENDPOINT})
-        self.assertEqual(subscription['ack_deadline'], 0)
+        self.assertEqual(subscription['pushConfig'],
+                         {'pushEndpoint': self.PUSH_ENDPOINT})
+        self.assertEqual(subscription['ackDeadlineSeconds'], 0)
         self.assertEqual(next_token, None)
 
         name, options = gax_api._list_subscriptions_called_with
@@ -322,7 +322,7 @@ def test_subscription_create(self):
         expected = {
             'name': self.SUB_PATH,
             'topic': self.TOPIC_PATH,
-            'ack_deadline': 0,
+            'ackDeadlineSeconds': 0,
         }
         self.assertEqual(resource, expected)
         name, topic, push_config, ack_deadline, options = (
@@ -368,7 +368,8 @@ def test_subscription_create_error(self):
         self.assertEqual(options, None)
 
     def test_subscription_get_hit(self):
-        sub_pb = _SubscriptionPB(self.SUB_PATH, self.TOPIC_PATH, '', 0)
+        sub_pb = _SubscriptionPB(
+            self.SUB_PATH, self.TOPIC_PATH, self.PUSH_ENDPOINT, 0)
         gax_api = _GAXSubscriberAPI(_get_subscription_response=sub_pb)
         api = self._makeOne(gax_api)
 
@@ -377,7 +378,10 @@ def test_subscription_get_hit(self):
         expected = {
             'name': self.SUB_PATH,
             'topic': self.TOPIC_PATH,
-            'ack_deadline': 0,
+            'ackDeadlineSeconds': 0,
+            'pushConfig': {
+                'pushEndpoint': self.PUSH_ENDPOINT,
+            },
         }
         self.assertEqual(resource, expected)
         sub_path, options = gax_api._get_subscription_called_with
@@ -851,11 +855,11 @@ def __init__(self, received_messages):
 
 class _SubscriptionPB(object):
 
-    def __init__(self, name, topic, push_endpoint, ack_deadline):
+    def __init__(self, name, topic, push_endpoint, ack_deadline_seconds):
         self.name = name
         self.topic = topic
         self.push_config = _PushConfigPB(push_endpoint)
-        self.ack_deadline = ack_deadline
+        self.ack_deadline_seconds = ack_deadline_seconds
 
 
 class _ListSubscriptionsResponsePB(object):