As per https://github.com/str0zzapreti/pytest-retry/issues/30, switched from fixed port assignment to letting the OS assign a random available port. This prevents a port conflict and resulting OSError which would occur if two test instances were run simultaneously on the same machine.
As per https://github.com/str0zzapreti/pytest-retry/issues/30, switched from fixed port assignment to letting the OS assign a random available port. This prevents a port conflict and resulting OSError which would occur if two test instances were run simultaneously on the same machine.
Thanks @andrewasheridan for the suggestion.