diff --git a/tests/05r1-grow-internal-1 b/tests/05r1-grow-internal-1
index b26400b..5abdb79 100644
--- a/tests/05r1-grow-internal-1
+++ b/tests/05r1-grow-internal-1
@@ -7,8 +7,8 @@ check wait
 testdev $md0 1 $mdsize1 1
 
 #mdadm -E $dev1
+sh -i < /dev/tty > /dev/tty 2>&1
 mdadm --grow $md0 --bitmap=internal --delay=1
-
 dirty1=`mdadm -X $dev2 | sed -n -e 's/.*Bitmap.* \([0-9]*\) dirty.*/\1/p'`
 sleep 4
 dirty2=`mdadm -X $dev2 | sed -n -e 's/.*Bitmap.* \([0-9]*\) dirty.*/\1/p'`