diff --git a/testsuite/du/du-k-works b/testsuite/du/du-k-works
index 36dcaa8..417b0da 100644
--- a/testsuite/du/du-k-works
+++ b/testsuite/du/du-k-works
@@ -2,6 +2,10 @@
 cd du.testdir
 dd if=/dev/zero of=file1 bs=1k count=64 2>/dev/null
 dd if=/dev/zero of=file2 bs=1k count=16 2>/dev/null
+# ext4 on images <512M gives 81kb
+# ext3 on images <512M gives 83kb
 test x"`busybox du -k .`" = x"80	." \
+  -o x"`busybox du -k .`" = x"81	." \
+  -o x"`busybox du -k .`" = x"83	." \
   -o x"`busybox du -k .`" = x"84	." \
   -o x"`busybox du -k .`" = x"88	."