diff --git a/test/regress_openssl.c b/test/regress_openssl.c
index 1bf0b50d..f74cae1c 100644
--- a/test/regress_openssl.c
+++ b/test/regress_openssl.c
@@ -103,7 +103,7 @@ ssl_getcert(EVP_PKEY *key)
 	now += 3600;
 	X509_time_adj(X509_getm_notAfter(x509), 0, &now);
 	X509_set_pubkey(x509, key);
-	tt_assert(0 != X509_sign(x509, key, EVP_sha1()));
+	tt_assert(0 != X509_sign(x509, key, EVP_sha256()));
 
 	return x509;
 end: