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-rw-r--r--tests/hazmat/primitives/test_ec.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/tests/hazmat/primitives/test_ec.py b/tests/hazmat/primitives/test_ec.py
index d2b570dd..7127071f 100644
--- a/tests/hazmat/primitives/test_ec.py
+++ b/tests/hazmat/primitives/test_ec.py
@@ -125,6 +125,9 @@ def test_derive_private_key_errors(backend):
with pytest.raises(TypeError):
ec.derive_private_key(10, 'five', backend)
+ with pytest.raises(ValueError):
+ ec.derive_private_key(-7, curve, backend)
+
def test_ec_numbers():
numbers = ec.EllipticCurvePrivateNumbers(