Yes, there are tests that can be done at home to determine if someone has intestinal worms. One method is to visually inspect the anus of the person at night when they are asleep, as worms may be visible. Another method is to use transparent tape around the anus in the morning before using the bathroom, which can then be examined for worm eggs. If worms are found, it is important to consult a doctor for a proper diagnosis and treatment options that may be available over the counter. It is recommended to repeat the test a few times to increase accuracy. If you have any further questions, feel free to reach out for more information.