1 files changed, 6 insertions, 0 deletions
diff --git a/tests/hazmat/backends/test_openssl.py b/tests/hazmat/backends/test_openssl.py
index 8fd0d711..85331595 100644
--- a/tests/hazmat/backends/test_openssl.py
+++ b/tests/hazmat/backends/test_openssl.py
@@ -551,6 +551,12 @@ class TestOpenSSLEllipticCurve(object):
         with raises_unsupported_algorithm(_Reasons.UNSUPPORTED_ELLIPTIC_CURVE):
             _sn_to_elliptic_curve(backend, b"fake")
 
+    def test_elliptic_curve_exchange_algorithm_supported(self, monkeypatch):
+        monkeypatch.setattr(backend, "_lib", DummyLibrary())
+        assert not backend.elliptic_curve_exchange_algorithm_supported(
+            ec.ECDH(), ec.SECP256R1()
+        )
+
 
 @pytest.mark.requires_backend_interface(interface=RSABackend)
 class TestRSAPEMSerialization(object):