diff --git a/atproto.py b/atproto.py
index edff9fb..bf3050d 100644
--- a/atproto.py
+++ b/atproto.py
@@ -393,8 +393,8 @@ class ATProto(User, Protocol):
                 copy = base_obj.get_copy(to_cls)
                 assert copy
                 copy_did, coll, rkey = parse_at_uri(copy)
-                assert copy_did == did
-                assert coll == type
+                assert copy_did == did, (copy_did, did)
+                assert coll == type, (coll, type)
 
             logger.info(f'Storing ATProto {action} {type} {rkey}: {dag_json.encode(record).decode()}')
             repo.apply_writes([Write(action=action, collection=type, rkey=rkey,
diff --git a/ids.py b/ids.py
index bc6e3fd..7ff359e 100644
--- a/ids.py
+++ b/ids.py
@@ -66,7 +66,7 @@ def translate_user_id(*, id, from_proto, to_proto):
     Returns:
       str: the corresponding id in ``to_proto``
     """
-    assert id and from_proto and to_proto
+    assert id and from_proto and to_proto, (id, from_proto, to_proto)
     assert from_proto.owns_id(id) is not False or from_proto.LABEL == 'ui', \
         (id, from_proto.LABEL, to_proto.LABEL)
 
@@ -141,7 +141,7 @@ def translate_handle(*, handle, from_proto, to_proto, enhanced):
     Returns:
       str: the corresponding handle in ``to_proto``
     """
-    assert handle and from_proto and to_proto
+    assert handle and from_proto and to_proto, (handle, from_proto, to_proto)
     assert from_proto.owns_handle(handle) is not False or from_proto.LABEL == 'ui'
 
     if from_proto == to_proto:
@@ -188,7 +188,7 @@ def translate_object_id(*, id, from_proto, to_proto):
     Returns:
       str: the corresponding id in ``to_proto``
     """
-    assert id and from_proto and to_proto
+    assert id and from_proto and to_proto, (id, from_proto, to_proto)
     assert from_proto.owns_id(id) is not False or from_proto.LABEL == 'ui'
 
     # bsky.app profile URL to DID