skip test with openssl client because it will timeout with certain seed due to an openssl bug
@@ -9189,6 +9189,9 @@ run_test "DTLS fragmenting: 3d, openssl server, DTLS 1.2" \
-c "fragmenting handshake message" \
-C "error"
+## the test below will time out with certain seed.
+## The cause is an openssl bug (https://github.com/openssl/openssl/issues/18887)
+skip_next_test
requires_config_enabled MBEDTLS_SSL_PROTO_DTLS
requires_config_enabled MBEDTLS_RSA_C
requires_config_enabled MBEDTLS_ECDSA_C
