diff --git a/infra/deploy/test_verify_corpus.py b/infra/deploy/test_verify_corpus.py
index deff0c3..4033192 100644
--- a/infra/deploy/test_verify_corpus.py
+++ b/infra/deploy/test_verify_corpus.py
@@ -285,6 +285,15 @@ class CorpusInventoryTests(unittest.TestCase):
             {item["kind"] for item in result["finding_examples"]},
         )
 
+    def test_rejects_unsupported_normalizer_version(self):
+        normalized, _ = self._nonempty_corpus(normalizer_version="9.9.9")
+        result = verify_corpus(self.raw, normalized, self.base / "artifacts")
+        self.assertEqual(result["status"], "failed")
+        self.assertIn(
+            "normalizer_version_mismatch",
+            {item["kind"] for item in result["finding_examples"]},
+        )
+
     def test_raw_normalized_source_mismatch_is_reported(self):
         normalized, _ = self._nonempty_corpus()
         manifest = sqlite3.connect(normalized / "manifest.sqlite3")