diff --git a/test.sh b/test.sh
index f3e86c5..bb4e8f9 100755
--- a/test.sh
+++ b/test.sh
@@ -3,7 +3,7 @@ set -u
 set -x
 set -e 
 
-dd if=/dev/urandom of=data.send bs=1024 count=1
+dd if=/dev/urandom of=data.send bs=1024 count=8
 python send.py
 python recv.py
 python errors.py data.* #python show.py tx.int16 rx.int16
\ No newline at end of file