diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index 0972831..b6af4df 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -5359,6 +5359,7 @@
 #
 # here and below we just want to test that the we fragment in a way that
 # pleases other implementations, so we don't need the peer to fragment
+requires_gnutls
 requires_config_enabled MBEDTLS_SSL_PROTO_DTLS
 requires_config_enabled MBEDTLS_RSA_C
 requires_config_enabled MBEDTLS_ECDSA_C
@@ -5373,6 +5374,7 @@
             -c "fragmenting handshake message" \
             -C "error"
 
+requires_gnutls
 requires_config_enabled MBEDTLS_SSL_PROTO_DTLS
 requires_config_enabled MBEDTLS_RSA_C
 requires_config_enabled MBEDTLS_ECDSA_C