tests: Use fork instead of forkserver #174
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Make sure test can be successfully run on pyton 3.14.
According to
https://docs.python.org/dev/whatsnew/3.14.html#multiprocessing
The default start method (see Contexts and start methods) changed from fork to forkserver on platforms other than macOS & Windows where it was already spawn. If you require the threading incompatible fork start method you must explicitly request it using a context from multiprocessing.get_context() (preferred) or change the default via multiprocessing.set_start_method().
See also https://bugzilla.redhat.com/show_bug.cgi?id=2326934 for reference on the reported bug for the Fedora package.
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