diff --git a/.github/workflows/integration-test-local.yml b/.github/workflows/integration-test-local.yml
index de25eea96..2948847d0 100644
--- a/.github/workflows/integration-test-local.yml
+++ b/.github/workflows/integration-test-local.yml
@@ -100,7 +100,7 @@ jobs:
         run: poetry run skyplane deprovision
       - name: Delete matching S3 buckets
         run: |
-          for pattern in "test-skyplane-" "skyplane-integration-us-east-1-" "integrationus-east-1-"; do
+          for pattern in "test-skyplane-" "skyplane-integration-" "integrationus-east-1-"; do
             aws s3api list-buckets --query "Buckets[?starts_with(Name, \`${pattern}\`) == \`true\`].Name" --output text | tr '\t' '\n' | while read bucket; do aws s3 rb "s3://$bucket" --force; done
           done
       - name: Cleanup GCP service account
diff --git a/.github/workflows/integration-test-multiple-sizes.yml b/.github/workflows/integration-test-multiple-sizes.yml
index 0fbc7bd65..4b9a72b18 100644
--- a/.github/workflows/integration-test-multiple-sizes.yml
+++ b/.github/workflows/integration-test-multiple-sizes.yml
@@ -104,7 +104,7 @@ jobs:
         run: poetry run skyplane deprovision
       - name: Delete matching S3 buckets
         run: |
-          for pattern in "test-skyplane-" "skyplane-integration-us-east-1-" "integrationus-east-1-"; do
+          for pattern in "test-skyplane-" "skyplane-integration-" "integrationus-east-1-"; do
             aws s3api list-buckets --query "Buckets[?starts_with(Name, \`${pattern}\`) == \`true\`].Name" --output text | tr '\t' '\n' | while read bucket; do aws s3 rb "s3://$bucket" --force; done
           done
       - name: Cleanup GCP service account
diff --git a/.github/workflows/integration-test.yml b/.github/workflows/integration-test.yml
index eb7b4822c..cfafe1f35 100644
--- a/.github/workflows/integration-test.yml
+++ b/.github/workflows/integration-test.yml
@@ -97,7 +97,7 @@ jobs:
         run: poetry run skyplane deprovision
       - name: Delete matching S3 buckets
         run: |
-          for pattern in "test-skyplane-" "skyplane-integration-us-east-1-" "integrationus-east-1-"; do
+          for pattern in "test-skyplane-" "skyplane-integration-" "integrationus-east-1-"; do
             aws s3api list-buckets --query "Buckets[?starts_with(Name, \`${pattern}\`) == \`true\`].Name" --output text | tr '\t' '\n' | while read bucket; do aws s3 rb "s3://$bucket" --force; done
           done
       - name: Cleanup GCP service account
diff --git a/skyplane/api/transfer_job.py b/skyplane/api/transfer_job.py
index 9d8fdeceb..02b92d439 100644
--- a/skyplane/api/transfer_job.py
+++ b/skyplane/api/transfer_job.py
@@ -25,12 +25,8 @@
 from skyplane import exceptions
 from skyplane.api.config import TransferConfig
 from skyplane.chunk import Chunk, ChunkRequest
-from skyplane.obj_store.azure_blob_interface import AzureBlobInterface, AzureBlobObject
-from skyplane.obj_store.gcs_interface import GCSObject
-from skyplane.obj_store.r2_interface import R2Object
 from skyplane.obj_store.storage_interface import StorageInterface
 from skyplane.obj_store.object_store_interface import ObjectStoreObject, ObjectStoreInterface
-from skyplane.obj_store.s3_interface import S3Object
 from skyplane.utils import logger
 from skyplane.utils.definitions import MB
 from skyplane.utils.fn import do_parallel
@@ -161,7 +157,9 @@ def _run_multipart_chunk_thread(
 
                     metadata = None
                     # Convert parts to base64 and store mime_type if destination interface is AzureBlobInterface
-                    if isinstance(dest_iface, AzureBlobInterface):
+                    if dest_iface.provider == "azure":
+                        from skyplane.obj_store.azure_blob_interface import AzureBlobInterface
+
                         block_ids = list(map(lambda part_num: AzureBlobInterface.id_to_base64_encoding(part_num, dest_object.key), parts))
                         metadata = (block_ids, mime_type)
 
@@ -294,12 +292,20 @@ def transfer_pair_generator(
                         raise e from None
 
                     if dest_provider == "aws":
+                        from skyplane.obj_store.s3_interface import S3Object
+
                         dest_obj = S3Object(provider=dest_provider, bucket=dst_iface.bucket(), key=dest_key)
                     elif dest_provider == "azure":
+                        from skyplane.obj_store.azure_blob_interface import AzureBlobObject
+
                         dest_obj = AzureBlobObject(provider=dest_provider, bucket=dst_iface.bucket(), key=dest_key)
                     elif dest_provider == "gcp":
+                        from skyplane.obj_store.gcs_interface import GCSObject
+
                         dest_obj = GCSObject(provider=dest_provider, bucket=dst_iface.bucket(), key=dest_key)
                     elif dest_provider == "cloudflare":
+                        from skyplane.obj_store.r2_interface import R2Object
+
                         dest_obj = R2Object(provider=dest_provider, bucket=dst_iface.bucket(), key=dest_key)
                     else:
                         raise ValueError(f"Invalid dest_region {dest_region}, unknown provider")
diff --git a/skyplane/obj_store/r2_interface.py b/skyplane/obj_store/r2_interface.py
index b29faea4a..bdb1c679d 100644
--- a/skyplane/obj_store/r2_interface.py
+++ b/skyplane/obj_store/r2_interface.py
@@ -33,7 +33,7 @@ def __init__(self, account_id: str, bucket_name: str):
                 endpoint_url=self.endpoint_url,
                 aws_access_key_id=self.config.cloudflare_access_key_id,
                 aws_secret_access_key=self.config.cloudflare_secret_access_key,
-                region_name="auto", # explicity set region, otherwise may be read from AWS boto3 env 
+                region_name="auto",  # explicity set region, otherwise may be read from AWS boto3 env
             )
         except Exception as e:
             raise ValueError("Error with connecting to {self.endpoint_url}: {e}")