update exception to contain detail
diff --git a/tests/test_x509_ext.py b/tests/test_x509_ext.py
index 5f175c4..c17beba 100644
--- a/tests/test_x509_ext.py
+++ b/tests/test_x509_ext.py
@@ -766,5 +766,7 @@
             x509.load_pem_x509_certificate,
             backend
         )
-        with pytest.raises(x509.UnsupportedGeneralNameType):
+        with pytest.raises(x509.UnsupportedGeneralNameType) as exc:
             cert.extensions
+
+        assert exc.value.type == "otherName"