Rename OpenSSLSerializationBackend
diff --git a/tests/conftest.py b/tests/conftest.py
index d55e6cf..86d5a03 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -18,7 +18,7 @@
 from cryptography.hazmat.backends import _available_backends
 from cryptography.hazmat.backends.interfaces import (
     CMACBackend, CipherBackend, DSABackend, HMACBackend, HashBackend,
-    PBKDF2HMACBackend, RSABackend
+    PBKDF2HMACBackend, RSABackend, TraditionalOpenSSLSerializationBackend
 )
 from .utils import check_backend_support, check_for_iface, select_backends
 
@@ -40,6 +40,11 @@
     check_for_iface("pbkdf2hmac", PBKDF2HMACBackend, item)
     check_for_iface("dsa", DSABackend, item)
     check_for_iface("rsa", RSABackend, item)
+    check_for_iface(
+        "traditional_openssl_serialization",
+        TraditionalOpenSSLSerializationBackend,
+        item
+    )
     check_backend_support(item)