// Should not throw
        assertDoesNotThrow(creds::refresh);
    }

    @Test
    @DisplayName("refresh throws CIFSException when configured to fail")
    void refresh_failure_throws_cifs() {
        TestCredentials creds = new TestCredentials("Z", false, false, new Subject(), true);
        CIFSException ex = assertThrows(CIFSException.class, creds::refresh);