What is the best way to show an in-line promotion on a resume?

If I was promoted from Job Title to Senior Job Title at the same company, what is the best way to show that on a resume?

It feels redundant to put both with responsibilities listed, as the responsibilities are largely the same across both roles, just at a higher level in the senior role.

But, it also feels like it would be a lie if I just put the senior title, as I was not a senior for my first year with the company.

Interested to know the best way to represent this!