test_runner: fix passing `expectFailure` #2851

Job	Run time
Build slim tarball	1m 41s
x86_64-linux: with shared libraries	2h 3m 33s
aarch64-linux: with shared libraries	1h 30m 8s
aarch64-darwin: with shared libraries	4h 3m 49s
x86_64-darwin: with shared libraries	1h 14m 22s
	8h 53m 33s

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