diff --git a/utils/registry/dom/test_schema.py b/utils/registry/dom/test_schema.py
index b0ceb0f6c..90b72ccec 100644
--- a/utils/registry/dom/test_schema.py
+++ b/utils/registry/dom/test_schema.py
@@ -258,6 +258,8 @@ class TestSchema(unittest.TestCase):
             schema = SchemaDOM()
             schema.parse(dom)
 
+            self.assertTrue(schema.valid)
+
             schemas[schema.ref] = schema
 
         files = []
@@ -267,6 +269,9 @@ class TestSchema(unittest.TestCase):
             dom = FileDOM(src=fname)
             dom.parse(text.splitlines())
 
+            self.assertTrue(dom.valid)
+            self.assertEqual(str(dom), text)
+
             files.append(dom)
 
             name = dom.src.split("/")[-1].replace("_", "/")