diff --git a/testsuite/dd/dd-count-bytes b/testsuite/dd/dd-count-bytes
new file mode 100644
index 0000000..0730cba
--- /dev/null
+++ b/testsuite/dd/dd-count-bytes
@@ -0,0 +1 @@
+test "$(echo I WANT | busybox dd count=3 iflag=count_bytes 2>/dev/null)" = "I W"