They can test you whenever they choose too, but if your doing what your supposed to do, and no dirty test and you haven't miss any test. They will work with you.
It all depends on you. If you have no stalls (misses), no delutions (Drank a lot of water) an no other problems with po you will test weekly for six months, then 1 time a month, for about 6 months. Then on call after that for as long as your PO says.
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