diff --git a/python/ray/tests/test_cli.py b/python/ray/tests/test_cli.py
index 97286004c..2536be89d 100644
--- a/python/ray/tests/test_cli.py
+++ b/python/ray/tests/test_cli.py
@@ -92,7 +92,7 @@ def configure_aws():
 
     # moto (boto3 mock) only allows a hardcoded set of AMIs
     dlami = (
-        moto.ec2.ec2_backends["us-west-2"]
+        moto.ec2.models.ec2_backends["us-west-2"]["us-west-2"]
         .describe_images(filters={"name": "Deep Learning AMI Ubuntu*"})[0]
         .id
     )
diff --git a/python/requirements.txt b/python/requirements.txt
index 298a171ff..5b40c60e3 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -64,7 +64,7 @@ google-cloud-storage
 gym-minigrid==1.0.3
 kubernetes
 lxml
-moto[s3,server] < 4.0.0
+moto[s3,server] >= 4.0.0
 mypy
 networkx
 numba