diff --git a/requirements-swh.txt b/requirements-swh.txt
--- a/requirements-swh.txt
+++ b/requirements-swh.txt
@@ -1,4 +1,4 @@
 swh.storage >= 0.7.0
-swh.model >= 0.3
+swh.model >= 0.3.5
 swh.scheduler >= 0.0.39
 swh.loader.core >= 0.3.2
diff --git a/swh/loader/svn/ra.py b/swh/loader/svn/ra.py
--- a/swh/loader/svn/ra.py
+++ b/swh/loader/svn/ra.py
@@ -460,12 +460,13 @@
         directories: List[Directory] = []
         for obj in self.directory.iter_tree():
             obj = obj.to_model()
-            if isinstance(obj, Content):
+            obj_type = obj.object_type
+            if obj_type in ("content_file", "content"):
                 obj = obj.with_data()
                 contents.append(obj)
-            elif isinstance(obj, SkippedContent):
+            elif obj_type == "skipped_content":
                 skipped_contents.append(obj)
-            elif isinstance(obj, Directory):
+            elif obj_type == "directory":
                 directories.append(obj)
             else:
                 raise TypeError(f"Unexpected content type from disk: {obj}")