t0090: disable GIT_TEST_SPLIT_INDEX for the test checking split index

diff --git a/t/t5310-pack-bitmaps.sh b/t/t5310-pack-bitmaps.sh
index 557bd0d0c09e370515acb7fc75391f0a7d62d73e..7bff7923f2a91165b5a0b5251351798519d63270 100755 (executable)
--- a/t/t5310-pack-bitmaps.sh
+++ b/t/t5310-pack-bitmaps.sh
@@ -335,7 +335,7 @@ test_expect_success 'truncated bitmap fails gracefully' '
        git rev-list --use-bitmap-index --count --all >expect &&
        bitmap=$(ls .git/objects/pack/*.bitmap) &&
        test_when_finished "rm -f $bitmap" &&
-       head -c 512 <$bitmap >$bitmap.tmp &&
+       test_copy_bytes 512 <$bitmap >$bitmap.tmp &&
        mv -f $bitmap.tmp $bitmap &&
        git rev-list --use-bitmap-index --count --all >actual 2>stderr &&
        test_cmp expect actual &&