input:
A [50.86891010043061, 59.211612840676366, 14.095573965283215, 53.92947021245732]
B [92.83868642109032, 92.74100718351963, 66.45347831348518, 7.343025635242084]

output:
'The winner is B after 1 attacks!' should equal 'The winner is A after 0 attacks!'

I think there's an error in your solution.

Random tests should have the correct describe/it structure.

Reference solution is wrong.

With float values the result depends on the order of operations.

The input should be (tuple, tuple) instead of (str, str, dict).

No fixed tests where the second fighter is the winner.