diff --git a/shared/datastore/src/get.py b/shared/datastore/src/get.py
index dfd9206..6c4cc69 100644
--- a/shared/datastore/src/get.py
+++ b/shared/datastore/src/get.py
@@ -14,9 +14,10 @@ def get(
 ) -> BytesIO:
     """Get buffer from bucket in MinIO."""
     assert isinstance(client, Minio)
-    assert isinstance(object_name, str)
     assert isinstance(bucket_name, str)
     assert len(bucket_name) > 0
+    assert isinstance(object_name, str)
+    assert len(object_name) > 0
     try:
         # make request
         response = client.get_object(