@Test
public void testGetKubernetesClientNullClientKey() throws Exception {

  var clusterCaCertificate = Resources.toString(Resources.getResource("ca.crt"), UTF_8);
  var clientCertificate = Resources.toString(Resources.getResource("client.crt"), UTF_8);
  exception.expect(NullPointerException.class);
  getKubernetesClient("", clusterCaCertificate, clientCertificate, null);
}