diff --git a/tests/X509/test_x509_certificate.py b/tests/X509/test_x509_certificate.py
index 737217f..333eb83 100644
--- a/tests/X509/test_x509_certificate.py
+++ b/tests/X509/test_x509_certificate.py
@@ -17,6 +17,7 @@
 import unittest
 
 import mock
+from pyasn1.type import univ as asn1_univ
 
 import io
 import textwrap
@@ -303,3 +304,9 @@ class TestX509Cert(unittest.TestCase):
     def test_verify_unknown_key(self):
         with self.assertRaises(x509_errors.X509Error):
             self.cert.verify("abc")
+
+    def test_verify_signature_mismatch(self):
+        alg = asn1_univ.ObjectIdentifier('1.2.3.4')
+        self.cert._cert['signatureAlgorithm']['algorithm'] = alg
+        with self.assertRaises(x509_errors.X509Error):
+            self.cert.verify()