Refs #1947 -- add support for IAN to the OpenSSL backend
diff --git a/tests/test_x509_ext.py b/tests/test_x509_ext.py
index 6a23479..62d9f83 100644
--- a/tests/test_x509_ext.py
+++ b/tests/test_x509_ext.py
@@ -1258,6 +1258,23 @@
         assert san != object()
 
 
+@pytest.mark.requires_backend_interface(interface=RSABackend)
+@pytest.mark.requires_backend_interface(interface=X509Backend)
+class TestRSAIssuerAlternativeNameExtension(object):
+    def test_uri(self, backend):
+        cert = _load_cert(
+            os.path.join("x509", "custom", "ian_uri.pem"),
+            x509.load_pem_x509_certificate,
+            backend,
+        )
+        ext = cert.extensions.get_extension_for_oid(
+            x509.OID_ISSUER_ALTERNATIVE_NAME
+        )
+        assert list(ext.value) == [
+            x509.UniformResourceIdentifier(u"http://path.to.root/root.crt"),
+        ]
+
+
 class TestSubjectAlternativeName(object):
     def test_get_values_for_type(self):
         san = x509.SubjectAlternativeName(