repair tests for cmg=1 (#737) #19

Job	Run time
ci (tpb, ubuntu-22.04, --pb --threads --enable-libffi, test-some-fast)	39m 23s
ci (a6osx, macos-12)	17m 52s
ci (ta6osx, macos-12)	20m 19s
ci (i3le, ubuntu-22.04)	16m 32s
ci (ti3le, ubuntu-22.04)	19m 56s
ci (a6le, ubuntu-22.04)	15m 55s
ci (ta6le, ubuntu-22.04)	18m 17s
ci (ta6le, ubuntu-22.04, reboot, -m=ta6le --force, re.boot SCHEME="chezscheme", test-some-fast)	14m 42s
ci (i3nt, windows-2022, vs)	28m 58s
ci (ti3nt, windows-2022, vs)	35m 39s
ci (a6nt, windows-2022, vs)	28m 15s
ci (ta6nt, windows-2022, vs)	38m 54s
ci (ta6nt, windows-2022, gcc)	26m 25s
	5h 21m 7s

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