diff --git a/tests/virnettlshelpers.c b/tests/virnettlshelpers.c
index 531d0b9075..b735c4e2f0 100644
--- a/tests/virnettlshelpers.c
+++ b/tests/virnettlshelpers.c
@@ -384,7 +384,7 @@ testTLSGenerateCert(struct testTLSCertReq *req,
      * If no 'ca' is set then we are self signing
      * the cert. This is done for the root CA certs
      */
-    if ((err = gnutls_x509_crt_sign(crt, ca ? ca : crt, privkey)) < 0) {
+    if ((err = gnutls_x509_crt_sign2(crt, ca ? ca : crt, privkey, GNUTLS_DIG_SHA256, 0)) < 0) {
         VIR_WARN("Failed to sign certificate %s", gnutls_strerror(err));
         abort();
     }