diff --git a/swh/loader/svn/loader.py b/swh/loader/svn/loader.py
--- a/swh/loader/svn/loader.py
+++ b/swh/loader/svn/loader.py
@@ -232,13 +232,10 @@
         parents = swh_rev.parents
 
         assert self.svnrepo is not None
-        hash_data_per_revs = self.svnrepo.swh_hash_data_at_revision(revision_start)
-
-        rev = revision_start
-        commit, root_dir = list(hash_data_per_revs)[0]
+        commit, root_dir = self.svnrepo.swh_hash_data_at_revision(revision_start)
 
         dir_id = root_dir.hash
-        swh_revision = self.build_swh_revision(rev, commit, dir_id, parents)
+        swh_revision = self.build_swh_revision(revision_start, commit, dir_id, parents)
         swh_revision_id = swh_revision.id
         return swh_revision_id == revision_id
 
diff --git a/swh/loader/svn/svn.py b/swh/loader/svn/svn.py
--- a/swh/loader/svn/svn.py
+++ b/swh/loader/svn/svn.py
@@ -261,7 +261,7 @@
 
     def swh_hash_data_at_revision(
         self, revision: int
-    ) -> Iterator[Tuple[Dict, DirectoryFromDisk]]:
+    ) -> Tuple[Dict, DirectoryFromDisk]:
         """Compute the information at a given svn revision. This is expected to be used
         for checks only.
 
@@ -282,7 +282,7 @@
         # Clean export directory
         self.clean_fs(local_dirname)
 
-        yield commit, directory
+        return commit, directory
 
     def clean_fs(self, local_dirname: Optional[str] = None) -> None:
         """Clean up the local working copy.