diff --git a/test/shell/devicesfile-devname.sh b/test/shell/devicesfile-devname.sh
index a99fe3e9a..338637275 100644
--- a/test/shell/devicesfile-devname.sh
+++ b/test/shell/devicesfile-devname.sh
@@ -590,7 +590,7 @@ OPVID2=`pvs "$dev2" --noheading -o uuid | awk '{print $1}'`
 PVID1=`pvs "$dev1" --noheading -o uuid | tr -d - | awk '{print $1}'`
 PVID2=`pvs "$dev2" --noheading -o uuid | tr -d - | awk '{print $1}'`
 
-mdadm --create --metadata=1.0 "$mddev" --level 1 --chunk=64 --raid-devices=2 "$dev3" "$dev4"
+mdadm --create --metadata=1.0 "$mddev" --level 1 --raid-devices=2 "$dev3" "$dev4"
 wait_md_create "$mddev"
 
 sed -e "s|DEVNAME=$dev1|DEVNAME=$dev3|" "$ORIG" > tmp1.devices