'
 
 test_expect_success 'verify blob:limit=1m' '
-       cat </dev/null >expected &&
        git -C r2 rev-list HEAD --quiet --objects --filter-print-omitted --filter=blob:limit=1m \
                | awk -f print_1.awk \
                | sed "s/~//" \
                | sort >observed &&
-       test_cmp observed expected
+       test_must_be_empty observed
 '
 
 # Test sparse:path=<path> filter.