id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
31979	Make new setup_databases() argument time_keeper optional	Jon Dufresne	Jon Dufresne	"The argument was added in commit 61a0ba43cfd4ff66f51a9d73dcd8ed6f6a6d9915 as work on ticket #31811.

`setup_databases()` is used by 3rd party tools. As well, the signature is documented: https://docs.djangoproject.com/en/3.1/topics/testing/advanced/#django.test.utils.setup_databases

For backwards compatibility, make the new argument optional. If not provided, a `NullTimeKeeper` can be instantiated so no other None-checks will be required deeper in the stack.
"	Cleanup/optimization	closed	Testing framework	dev	Normal	fixed		Ahmad A. Hussein	Accepted	1	0	0	0	0	0