Trying to make sure my tyranny is not slipping even a little. Is this good test???

If it is slipping it is not obvious. Drive normay, l shift smooth from what I can tell.

But is this a good test to see if it is slipping.

1. Drive it on the freeway. Take it to a area with a steep hill. So steep if you try to maintain speed by putting more and more gas you call cause the tyranny to down shift automatically.
2. Maintain the same speed by putting more gas (but not enough to cause it to down shift) and if the rpm stay consistent with your speed then you tyranny is not slipping.

In effect what I am doing is putting more load on the tranny to see if the rpm and speed remains consistent (slipping).

Would this be a good test????

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Silver Honda Accord, 2006
Silver G500, 2003
Silver SLK-320, 2002
Black ML-320, 2000
Bule Porsche 993 Targa , 1997
Silver Merkur XR4Ti, 1987