-log_must $ZFS umount $TEST_SEND_FS
-log_must $ZFS snap $TEST_SNAP
-log_must $ZFS send $TEST_SNAP > $TEST_STREAM
+log_must zfs snap $TEST_SNAP
+log_must zfs send $TEST_SNAP > $TEST_STREAM
+log_must rm -f /$TEST_SEND_FS/$TEST_FILE
+log_must touch /$TEST_SEND_FS/$TEST_FILEINCR
+log_must zfs snap $TEST_SNAPINCR
+log_must zfs send -i $TEST_SNAP $TEST_SNAPINCR > $TEST_STREAMINCR