Upvote:5
The test providers need to be able to verify that you are who you say you are. Otherwise they cannot create a test certificate for you.
Hence they ask for a government issued ID, and in some countries the only option you have is a passport. What you should look for is reputable companies that list on their website what their privacy and data protection measures are.
If you want to avoid that do not use such a βtake at homeβ test. Many countries do not even accept those. Just go to a test centre.