It won't block the test, but you only need to run 2-300mg test a week with the primo. You can run it higher, but don't need to.
You're primo is fine, be sure to track your bp, hematocrit, etc. Should be minimal change with real primo and low dose test, if big change it might be EQ or fake.
Be sure to run the primo for a good 16 weeks at very least, best 20-24 weeks.