diff --git a/swh/deposit/client.py b/swh/deposit/client.py
--- a/swh/deposit/client.py
+++ b/swh/deposit/client.py
@@ -532,9 +532,12 @@
         return "put" if replace else "post"
 
 
-class UpdateMetadataOnDoneDepositClient(UpdateMetadataOnPartialDepositClient):
+class UpdateMetadataOnDoneDepositClient(CreateMetadataDepositClient):
     """Update metadata on "done" deposit. This requires the deposit swhid."""
 
+    def compute_url(self, collection, *args, deposit_id=None, **kwargs):
+        return f"/{collection}/{deposit_id}/atom/"
+
     def compute_headers(self, info: Dict[str, Any]) -> Dict[str, Any]:
         return {
             "CONTENT-TYPE": "application/atom+xml;type=entry",
diff --git a/swh/deposit/tests/data/https_deposit.test.updateswhid/1_test_123_metadata b/swh/deposit/tests/data/https_deposit.test.updateswhid/1_test_123_atom
rename from swh/deposit/tests/data/https_deposit.test.updateswhid/1_test_123_metadata
rename to swh/deposit/tests/data/https_deposit.test.updateswhid/1_test_123_atom