ExecJob result = execJob.lastaEnv(testEnv);
        assertEquals(testEnv, execJob.lastaEnv);
        assertSame(execJob, result);
    }

    // Test addSystemProperty method
    public void test_addSystemProperty() {
        List<String> cmdList = new ArrayList<>();

        // Test with system property that exists
        System.setProperty("test.property", "test.value");