Interaction with pytest fixtures

Several tests in in my code use fixtures, and from looking at the durations file generated by pytest-split it seems like the time for creating those fixtures gets assigned to the first test that calls for them. However, when the tests are split, it splits them in such a way that the fixture has to be created multiple times in different jobs. Is it possible to include the fixture creation time into account somehow, or to keep tests that share fixtures together where possible?