test

minor: avoid int64 -> uint conversion #427

Job	Run time
test (stable, macos-latest)	44s
test (oldstable, windows-latest)	40s
test (stable, windows-latest)	50s
test (oldstable, ubuntu-latest)	13s
test (stable, ubuntu-latest)	26s
test (oldstable, macos-latest)	18s
	3m 11s

Provide feedback