diff --git a/pyas2lib/tests/test_advanced.py b/pyas2lib/tests/test_advanced.py
index 10f83d1..4e9650d 100644
--- a/pyas2lib/tests/test_advanced.py
+++ b/pyas2lib/tests/test_advanced.py
@@ -473,6 +473,7 @@ def setUp(self):
             verify_cert_ca=self.sb2bi_public_ca,
             encrypt_cert=self.sb2bi_public_key,
             encrypt_cert_ca=self.sb2bi_public_ca,
+            validate_certs=False
         )
         self.partner.load_verify_cert()
         self.partner.load_encrypt_cert()