diff --git a/swh/objstorage/tests/test_objstorage_http.py b/swh/objstorage/tests/test_objstorage_http.py
--- a/swh/objstorage/tests/test_objstorage_http.py
+++ b/swh/objstorage/tests/test_objstorage_http.py
@@ -108,3 +108,9 @@
         len(sto_front)
     with pytest.raises(exc.NonIterableObjStorage):
         iter(sto_front)
+
+
+def test_http_cannonical_url():
+    url = "http://127.0.0.1/content"
+    sto = get_objstorage(cls="http", url=url)
+    assert sto.root_path == url + "/"