Retaking a class to pump up GPA

I am in undergrad, but this is for my future in research, so I figured the people here know better than in undergrad subs.

I am doing electrical engineering at a pretty reputable school in Canada, third year undergrad. I am going into a research based master for sure, I have 2 research internships so for now academia is my plan A. I have a 3.8/4, and am wondering if retaking a class is worth it. It would boost it to a 3.85 if I ace it (I am confident about it). Is the difference in GPA going to get me better scholarships/ get me into a better school for my masters, or is it pointless other than for pride reasons?

Thanks