1 files changed, 13 insertions, 0 deletions
diff --git a/tests/test_x509.py b/tests/test_x509.py
index df315cc3..ac910392 100644
--- a/tests/test_x509.py
+++ b/tests/test_x509.py
@@ -866,6 +866,19 @@ class TestCertificateSigningRequestBuilder(object):
         ).add_extension(
             x509.SubjectAlternativeName([x509.DNSName(u"cryptography.io")]),
             critical=False,
+        ).add_extension(
+            x509.KeyUsage(
+                digital_signature=True,
+                content_commitment=True,
+                key_encipherment=False,
+                data_encipherment=False,
+                key_agreement=False,
+                key_cert_sign=True,
+                crl_sign=False,
+                encipher_only=False,
+                decipher_only=False
+            ),
+            critical=False
         )
         with pytest.raises(NotImplementedError):
             builder.sign(private_key, hashes.SHA256(), backend)