Test

Fixed PrivateAttr defaults ignored on database-loaded instances #3556

Job	Run time
test (windows-latest, 3.14, highest)	51s
test (ubuntu-latest, 3.14, highest)	30s
test (macos-latest, 3.11, highest)	27s
test (ubuntu-latest, 3.10, lowest-direct)	26s
test (ubuntu-latest, 3.13, highest)	27s
test (macos-latest, 3.13, highest)	26s
test (macos-latest, 3.14, highest)	34s
test (windows-latest, 3.12, lowest-direct)	1m 32s
coverage-combine	18s
alls-green	5s
	5m 36s

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