Tests

Refactor custom models #1694

Job	Run time
Python 3.9.x on ubuntu-latest test	36m 23s
Python 3.9.x on macos-latest test	24m 48s
Python 3.9.x on windows-latest test	31m 16s
Python 3.10.x on ubuntu-latest test	35m 6s
Python 3.10.x on macos-latest test	22m 39s
Python 3.10.x on windows-latest test	34m 34s
Python 3.11.x on ubuntu-latest test	32m 55s
Python 3.11.x on macos-latest test	23m 49s
Python 3.11.x on windows-latest test	30m 6s
Python 3.12.x on ubuntu-latest test	35m 47s
Python 3.12.x on macos-latest test	24m 34s
Python 3.12.x on windows-latest test	15m 54s
Python 3.13.x on ubuntu-latest test	24m 58s
Python 3.13.x on macos-latest test	23m 29s
Python 3.13.x on windows-latest test	29m 37s
	7h 5m 55s

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