sigh, missed one TLSv1 (#4392)

diff --git a/tests/hazmat/bindings/test_openssl.py b/tests/hazmat/bindings/test_openssl.py
index c0dbc9b..f317f07 100644
--- a/tests/hazmat/bindings/test_openssl.py
+++ b/tests/hazmat/bindings/test_openssl.py
@@ -65,7 +65,8 @@
         # Test that we're properly handling 32-bit unsigned on all platforms.
         b = Binding()
         assert b.lib.SSL_OP_ALL > 0
-        ctx = b.lib.SSL_CTX_new(b.lib.TLSv1_method())
+        ctx = b.lib.SSL_CTX_new(b.lib.SSLv23_method())
+        assert ctx != b.ffi.NULL
         ctx = b.ffi.gc(ctx, b.lib.SSL_CTX_free)
         ssl = b.lib.SSL_new(ctx)
         ssl = b.ffi.gc(ssl, b.lib.SSL_free)