The correct spelling of the word "dost tests" is actually "dose tests." The word "dose" is pronounced as /doʊs/ in IPA phonetic transcription, which rhymes with "close" and "gross." The confusion in spelling may arise from the similar pronunciation of the words "dost" and "dose," but "dost" is not a commonly used word in modern English. It is important to pay attention to spelling and pronunciation of words to effectively communicate in both oral and written forms.