diff --git a/tests/xfs/242 b/tests/xfs/242
index 304e69f6..4e1a8b44 100755
--- a/tests/xfs/242
+++ b/tests/xfs/242
@@ -47,14 +47,7 @@ _supported_fs xfs
 _supported_os Linux
 _require_test
 
-_test_io_zero()
-{
-	$XFS_IO_PROG -c "zero help" 2>&1 | \
-			grep 'command "zero" not found' > /dev/null
-	echo $?
-}
-
-[ $(_test_io_zero) -eq 0 ] && _notrun "zero command not supported"
+_require_xfs_io_command "zero"
 
 testfile=$TEST_DIR/242.$$