The other Frankie Pentangeli thread made me think of this line:

"Ten to one -- ten to one shot you said -- ten to one shot he would take the 5th -- and I lose."

Presumably, Frankie did not want to testify, so his comment would seem to imply that if Michael had taken the 5th, which apparently everyone thought he would do, he (Frankie) wouldn't have had to testify.

But it seems to me that he would have had to testify in order to support Willi Cicci's testimony whether Michael took the 5th or not.

To put it another way, suppose Michael had taken the 5th? Why would Frankie not have had to testify?