diff --git a/icechunk-python/python/icechunk/__init__.py b/icechunk-python/python/icechunk/__init__.py
index f5621bf5..863d9d96 100644
--- a/icechunk-python/python/icechunk/__init__.py
+++ b/icechunk-python/python/icechunk/__init__.py
@@ -14,6 +14,7 @@
     ConflictType,
     Credentials,
     Diff,
+    GcsBearerCredential,
     GcsCredentials,
     GcsStaticCredentials,
     GCSummary,
@@ -95,6 +96,7 @@
     "Credentials",
     "Diff",
     "GCSummary",
+    "GcsBearerCredential",
     "GcsCredentials",
     "GcsStaticCredentials",
     "IcechunkError",
diff --git a/icechunk-python/python/icechunk/repository.py b/icechunk-python/python/icechunk/repository.py
index ceecb7d7..dcafce86 100644
--- a/icechunk-python/python/icechunk/repository.py
+++ b/icechunk-python/python/icechunk/repository.py
@@ -340,7 +340,7 @@ def delete_branch(self, branch: str) -> None:
         """
         self._repository.delete_branch(branch)
 
-    def delete_tag(self, branch: str) -> None:
+    def delete_tag(self, tag: str) -> None:
         """
         Delete a tag.
 
@@ -353,7 +353,7 @@ def delete_tag(self, branch: str) -> None:
         -------
         None
         """
-        self._repository.delete_tag(branch)
+        self._repository.delete_tag(tag)
 
     def create_tag(self, tag: str, snapshot_id: str) -> None:
         """
diff --git a/icechunk-python/python/icechunk/storage.py b/icechunk-python/python/icechunk/storage.py
index 2abc8a73..70e87ee3 100644
--- a/icechunk-python/python/icechunk/storage.py
+++ b/icechunk-python/python/icechunk/storage.py
@@ -2,6 +2,7 @@
 from datetime import datetime
 
 from icechunk._icechunk_python import (
+    GcsBearerCredential,
     ObjectStoreConfig,
     S3Options,
     S3StaticCredentials,
@@ -222,6 +223,7 @@ def gcs_storage(
     bearer_token: str | None = None,
     from_env: bool | None = None,
     config: dict[str, str] | None = None,
+    get_credentials: Callable[[], GcsBearerCredential] | None = None,
 ) -> Storage:
     """Create a Storage instance that saves data in Google Cloud Storage object store.
 
@@ -235,6 +237,8 @@ def gcs_storage(
         Fetch credentials from the operative system environment
     bearer_token: str | None
         The bearer token to use for the object store
+    get_credentials: Callable[[], GcsBearerCredential] | None
+        Use this function to get and refresh object store credentials
     """
     credentials = gcs_credentials(
         service_account_file=service_account_file,
@@ -242,6 +246,7 @@ def gcs_storage(
         application_credentials=application_credentials,
         bearer_token=bearer_token,
         from_env=from_env,
+        get_credentials=get_credentials,
     )
     return Storage.new_gcs(
         bucket=bucket,
diff --git a/icechunk-python/python/icechunk/store.py b/icechunk-python/python/icechunk/store.py
index 8dfb52fb..538fd464 100644
--- a/icechunk-python/python/icechunk/store.py
+++ b/icechunk-python/python/icechunk/store.py
@@ -289,7 +289,7 @@ async def delete_dir(self, prefix: str) -> None:
 
         Parameters
         ----------
-        key : str
+        prefix : str
         """
         return await self._store.delete_dir(prefix)
 
diff --git a/icechunk-python/tests/test_credentials.py b/icechunk-python/tests/test_credentials.py
index d575afef..e598d7d5 100644
--- a/icechunk-python/tests/test_credentials.py
+++ b/icechunk-python/tests/test_credentials.py
@@ -113,7 +113,7 @@ def __call__(self) -> S3StaticCredentials:
         )
 
 
-def test_refreshable_credentials_refresh(tmp_path: Path) -> None:
+def test_s3_refreshable_credentials_refresh(tmp_path: Path) -> None:
     path = tmp_path / "calls.txt"
     creds_obj = ExpirableCredentials(path)