System.clearProperty("app.service.api");
        System.clearProperty("config.app.module");
    }

    // Test invalid regex in custom properties
    @Test
    public void test_customProperties_invalidRegex() {
        List<String> cmdList = new ArrayList<>();

        try {
            execJob.testAddFessCustomSystemProperties(cmdList, "[invalid(regex");
            fail("Should handle invalid regex");