@Test
void testInvalidToken() {

  VaultConfigSource vaultConfigSource =
      VaultConfigSource.builder()
          .config(c -> c.token("zzzzzz"))
          .config(c -> c.address("http://invalid.host.local:8200"))
          .addSecretsPath("secrets/unknown/path")
          .build();
  assertThrows(ConfigSourceNotAvailableException.class, vaultConfigSource::loadConfig);
}