another try at warning suppression #1217

Job	Run time
tests-Windows-CLI (mingw64, x86_64, 3.8)	4m 35s
tests-Windows-CLI (ucrt64, ucrt-x86_64, 3.8)	4m 32s
canceller	4s
tests-Unix-CLI (ubuntu-20.04, 7, 3.8)	57s
tests-Unix-GUI (ubuntu-20.04, 5.9.5, 7)	58s
tests-Unix-CLI (ubuntu-20.04, 11, 3.9)	1m 27s
tests-Unix-GUI (ubuntu-20.04, 5.15.2, 11)	1m 8s
tests-Windows-GUI (mingw64, x86_64)	2m 32s
tests-Unix-CLI (macos-12, 3.8)	5m 33s
tests-windows-latest-pacman (mingw64, x86_64)	1m 46s
tests-Unix-GUI (ubuntu-22.04, 5.15.2, 12)	49s
tests-Windows-GUI (ucrt64, ucrt-x86_64)	2m 35s
tests-Unix-CLI (macos-13, 3.9)	5m 29s
tests-windows-latest-pacman (ucrt64, ucrt-x86_64)	1m 44s
tests-Unix-GUI (ubuntu-22.04, 6.7.2, 12)	51s
tests-Unix-GUI (macos-12, 5.9.5)	5m 32s
tests-Unix-GUI (macos-13, 5.15.2)	5m 28s
tests-Unix-GUI (macos-13, 6.7.2)	4m 57s
	50m 57s

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