diff --git a/tests/02r5grow b/tests/02r5grow
index bb9bd6d..2da78ee 100644
--- a/tests/02r5grow
+++ b/tests/02r5grow
@@ -31,7 +31,7 @@ testdev $md0 3 $[mdsize1_l] 128
 
 mdadm --grow $md0 --size $[size/2]
 check nosync
-sh tests/testdev $md0 3 $[size/2] 128
+testdev $md0 3 $[size/2] 128
 
 mdadm -S $md0