The du-k-works test seems to assume that du -k on a directory with two files totaling 80 kilobytes should report either 80k or 88k. In some cases however, both busybox' du -k and coreutils' du -k reports a size of 84k which causes the test to fail. I can reproduce this with the latest git HEAD, make defconfig, make, make test on ext3 and ext4 filesystems. Build output of 1.9.3 attached.
Created attachment 3980 [details] Patch if this is intended behaviour The attached patch can be applied if du reports the right size. I think it does, given that it agrees with coreutils but I'm not the right guy to make that call.