diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 3f5dea246..11833807a 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -92,13 +92,13 @@ jobs:
               include:
                 - python-version: pypy3.10
                   toxenv: 'py-amqp'
-                  experimental: true
+                  experimental: false
                 - python-version: pypy3.10
                   toxenv: 'py-redis'
-                  experimental: true
+                  experimental: false
                 - python-version: pypy3.10
                   toxenv: 'py-mongodb'
-                  experimental: true
+                  experimental: false
                 # - python-version: pypy3.10
                 #   toxenv: 'py-kafka'
                 #   experimental: true
diff --git a/requirements/extras/gcpubsub.txt b/requirements/extras/gcpubsub.txt
index 9d8de22b6..bd31b5d04 100644
--- a/requirements/extras/gcpubsub.txt
+++ b/requirements/extras/gcpubsub.txt
@@ -1,4 +1,4 @@
 google-cloud-pubsub>=2.18.4
 google-cloud-monitoring>=2.16.0
-grpcio==1.67.0
+grpcio==1.68.1
 protobuf==5.29.5
diff --git a/t/unit/transport/test_gcpubsub.py b/t/unit/transport/test_gcpubsub.py
index c617a329e..6ebcce543 100644
--- a/t/unit/transport/test_gcpubsub.py
+++ b/t/unit/transport/test_gcpubsub.py
@@ -285,12 +285,13 @@ def test_create_subscription(self, channel):
         channel.subscriber.create_subscription.assert_called_once()
 
     def test_create_subscription_protobuf_compat(self):
+        from datetime import timedelta
         request = {
             'name': 'projects/my_project/subscriptions/kombu-1111-2222',
             'topic': 'projects/jether-fox/topics/reply.celery.pidbox',
             'ack_deadline_seconds': 240,
-            'expiration_policy': {'ttl': '86400s'},
-            'message_retention_duration': '86400s',
+            'expiration_policy': {'ttl': timedelta(seconds=86400)},
+            'message_retention_duration': timedelta(seconds=86400),
             'filter': 'attributes.routing_key="1111-2222"',
         }
         Subscription(request)