I would want to ask the purpose for testing flexion in internal rotation? This is a position where you may get some anterior translation of the humeral head and also is more or a compressive position with respect to the coracoacromial arch further into range. How did she injury in the first place and what was the direction i.e. where was the labral tear? Was it more a Bankart lesion?

A touch more information would help us with ideas on this one.