simplify a little #4041

Job	Run time
build	2m 33s
test_when_cache_present (0, 8, 694)	20m 54s
test_when_cache_missing	0s
test_when_cache_present (1, 8, 694)	20m 47s
test_when_cache_present (2, 8, 694)	20m 16s
test_when_cache_present (3, 8, 694)	20m 2s
test_when_cache_present (4, 8, 694)	20m 17s
test_when_cache_present (5, 8, 694)	21m 28s
test_when_cache_present (6, 8, 694)	21m 55s
test_when_cache_present (7, 8, 694)	23m 56s
test_when_cache_present (8, 8, 694)	9m 12s
save_test_times_when_cache_missing	0s
save_test_times_when_cache_present	10s
	3h 1m 30s

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