Config option for storage filename

[jayvdb]

I would like to store the cache file in a different directory, a directory which contains various files to be cached across test runs

[kstrauser]

Is there precedence for that in other tooling, like pytest-cov?

[jayvdb]

coverage uses os.environ.get('COVERAGE_FILE') or config data_file for its override of .coverage

But this isnt a high priority for me